RBSE Solutions Class 9 Information Technology Chapter 2 Input Output and Storage Device

Textbook Questions Solved

I. Multiple Choice Questions

 

Question 1. Numeric key pad is used for:
(a) Text processing
(b) Graphics Works
(c) Banking works
(d) All of the options
Answer: (c) Banking works
In simple words: The numeric keypad on a keyboard is mainly used for quickly typing numbers, which is very helpful for tasks like banking, accounting, or entering data that involves many numbers. It helps in fast data entry.

🎯 Exam Tip: Remember that while a numeric keypad can be used for other tasks, its primary design and most efficient use is for numerical data entry.

 

Question 2. Mouse is a:
(a) input device
(b) output device
(c) storage device
(d) None of the options
Answer: (a) input device
In simple words: A mouse is a device that helps you control what you see on the computer screen. You move it with your hand to tell the computer what to do, which makes it an input device. It translates physical movement into digital signals.

🎯 Exam Tip: Clearly understand the difference between input (sending data to the computer) and output (receiving data from the computer) devices.

 

Question 3. Speed of type metric:
(a) 20 bar per second
(b) 10 bar per second
(c) 5 bar per second
(d) 1 bar per second
Answer: (c) 5 bar per second
In simple words: This question talks about how fast something can be typed. The answer, 5 bar per second, refers to a specific unit of measurement for typing speed, like how many characters can be processed in a very short time.

🎯 Exam Tip: Pay attention to specific units of measurement used in technology questions, as they are crucial for accurate answers.

 

Question 5. Which of the following technique of printing is equillient to type writer ?
(a) Type metric printing
(b) Impact printing
(c) Non-impact printing
(d) laser printing
Answer: (b) Impact printing
In simple words: Impact printing is like a typewriter because it uses a physical force to press an inked ribbon onto the paper, leaving a mark. This is different from printers that use heat or ink sprays.

🎯 Exam Tip: Remember that impact printers make contact with the paper, which is their key similarity to traditional typewriters.

 

Question 6. Drum printer is a type of
(a) character printer
(b) Line Printer
(c) Page printer
(d) Graphics Printer
Answer: (a) character printer
In simple words: A drum printer is a type of impact printer that prints one line at a time by using a spinning drum with characters on it. It falls under the category of character printers because it forms characters directly.

🎯 Exam Tip: Know the different categories of printers (character, line, page) and their examples, as this helps classify specific printer types.

 

Question 7. Which one is a primary storage medium?
(a) Hard disk
(b) memory
(c) CD ROM
(d) Magnetic tape
Answer: (b) memory
In simple words: Primary storage, like RAM (Random Access Memory), is the main place where a computer temporarily keeps data it is actively using. This makes it a primary storage medium, unlike slower, permanent storage like hard disks or CDs.

🎯 Exam Tip: Differentiate between primary storage (fast, volatile, used by CPU directly) and secondary storage (slower, non-volatile, for long-term data saving).

 

Question 9. What is storage capacity of Micro floppy:
(a) 1.2 MB
(b) 650 MB
(c) 1.44 MB
(d) 2.8 MB
Answer: (c) 1.44 MB
In simple words: A Micro floppy disk, which was a common type of small storage disk, could typically hold 1.44 megabytes of data. This was a standard size for these portable disks.

🎯 Exam Tip: Remember the standard storage capacities for older media types like floppy disks, as these are common knowledge in computer basics.

Very Short Answer Type Questions

 

Question 1. Which device is used for read and write on disk?
Answer: A read/write head is the device used to read and write data on a disk, like in a hard drive or floppy disk. This tiny part moves across the disk surface to access information. It converts magnetic signals into electrical data and vice-versa.
In simple words: A read/write head helps computers get information from a disk and also put new information onto it.

🎯 Exam Tip: When explaining components like a read/write head, mention both its reading and writing functions to show complete understanding.

 

Question 2. Tiny -dots on monitor is known as:
Answer: The tiny dots on a monitor screen are known as pixels. These small picture elements combine to form all the images and text you see. Each pixel can show a different color, allowing for detailed images.
In simple words: The tiny dots that make up everything you see on a computer screen are called pixels.

🎯 Exam Tip: Understand that resolution is determined by the number of pixels on a screen, with more pixels leading to a clearer image.

 

Question 3. Dot matrix printer is an example of:
Answer: A dot matrix printer is an example of an impact printer. These printers create characters by striking pins against an ink ribbon, which then makes dots on the paper. This physical contact is key to how they work.
In simple words: A dot matrix printer is a kind of printer that works by hitting an ink ribbon onto paper to make letters, just like an old typewriter.

🎯 Exam Tip: When asked for an example, always provide the specific type (e.g., impact printer) and a brief description of its working principle.

 

Question 4. Hole in between floppy disk is known as:
Answer: The hole in the center of a floppy disk is known as the index hole or spindle hole. This hole is used by the floppy disk drive to spin the disk and align it correctly. It ensures the drive can accurately locate tracks and sectors.
In simple words: The hole in the middle of a floppy disk is called the index hole; it helps the computer spin the disk the right way.

🎯 Exam Tip: For parts of older technologies, recall their specific names and simple functions, as these often appear in basic computer knowledge questions.

 

Question 6. What is the significance of a monitor?
Answer: A computer monitor is very important because it is an output device that shows you everything on the computer screen. It displays the user interface and all the information you ask the computer to show. Without a monitor, you wouldn't be able to see what you are doing on the computer. It provides visual feedback for all operations.
In simple words: A monitor is important because it shows us what the computer is doing, like pictures and words, so we can see and understand.

🎯 Exam Tip: Focus on the monitor's role as a visual output device that makes user interaction with a computer possible when discussing its significance.

 

Question 7. Give the names of any two input and output devices.
Answer: Two input devices are keyboard and mouse. Two output devices are monitor and printers. Input devices send information to the computer, while output devices show or give out information from the computer. Each type plays a vital role in computer interaction.
In simple words: Keyboard and mouse are input devices. Monitor and printer are output devices.

🎯 Exam Tip: Always give clear and distinct examples for both input and output categories to ensure a complete answer.

 

Question 8. Which technique is used for laser printer?
Answer: Laser printers use a technique called Laser Beam or Electrophotography. This method uses a laser to draw an image on a special drum, which then picks up toner (powdered ink) and transfers it to the paper using heat. This technology allows for very fast and high-quality printing. It's similar to how a photocopy machine works.
In simple words: Laser printers use a special laser beam to draw on a drum, which then puts the ink powder onto the paper to print.

🎯 Exam Tip: Mentioning the core components like the laser beam, drum, and toner will demonstrate a good understanding of laser printer technology.

 

Question 9. What is the significance of a projector?
Answer: A projector is significant because it can display images and videos from a computer onto a large screen or wall. It is often used for showing presentations, charts, graphics, and even movies to a group of people. This makes it very useful for teaching, meetings, and entertainment. Projectors allow for large-scale viewing of digital content.
In simple words: A projector is important because it makes pictures and videos from a computer appear very large on a screen or wall for many people to see.

🎯 Exam Tip: Highlight the projector's ability to enlarge and share visual content with an audience as its primary importance.

III. Short Answer Type Questions

 

Question 1. What is the difference between soft copy and hard copy of a documentation?
Answer: A hard copy is a physical printout of a document, something you can touch, like a paper sheet. On the other hand, a soft copy is digital information saved on a computer, a CD/DVD, or any other storage device, which you can see on a screen but not touch. Soft copies are easy to share and modify, while hard copies are permanent records. This distinction is crucial for understanding document management.
In simple words: A hard copy is a printed paper, but a soft copy is a file on a computer or disk that you see on a screen.

🎯 Exam Tip: Clearly define both terms and emphasize their key difference: physical tangibility versus digital format.

 

Question 3. Differentiate between impact and non-impact printers.
Answer:
Impact printer: An impact printer makes text and images by hitting tiny pins on a print head against an ink ribbon, which then touches the paper. It makes a physical contact to print. An example is a Dot-matrix printer.
Non-impact printer: A non-impact printer prints text and graphics on paper without physically touching the paper. Instead, it uses methods like spraying ink or using lasers. Examples are Inkjet and Laser printers. These printers are generally quieter than impact printers.
In simple words: Impact printers hit the paper to print, like a dot-matrix printer. Non-impact printers spray ink or use lasers without touching the paper, like inkjet printers.

🎯 Exam Tip: When differentiating, always provide a clear definition and an example for each type to demonstrate a complete understanding.

 

Question 4. What are the uses of mouse?
Answer: A computer mouse is used to move a cursor (a small arrow or pointer) on the screen. It helps you control what the computer does by figuring out how your hand moves and in which direction. There are mainly two types of mice: ball-type mice that use a rolling rubber ball, and optical mice that use light bounced off the desk. This allows users to click, select, drag, and perform many actions easily. It is an essential tool for navigating graphical user interfaces.
In simple words: A mouse helps you move the pointer on the computer screen to choose things, click buttons, or draw.

🎯 Exam Tip: List the primary actions a mouse performs (move cursor, click, select, drag) to fully answer questions about its uses.

 

Question 5. How does joystick and light pen work?
Answer:
Joystick: A joystick is a control device shaped like a stick that moves around a pivot point. It is mostly used for playing computer games and also in special assistive technology. When you move the stick, it sends signals to the computer about its position, which controls actions in a game, like moving a character. It simulates a pilot's control stick in airplanes.
Light pen: A light pen is a pen-shaped device with a light sensor at its tip. You use it by touching it directly to a computer screen. When it touches the screen, it senses the light from that point and sends a signal to the computer. This allows users to draw or select items on the screen with good accuracy, much like a touch screen. This direct interaction is useful for design work.
In simple words: A joystick is a stick you move to control games on a computer. A light pen is like a special pen you touch to the screen to draw or choose things.

🎯 Exam Tip: For each device, explain its physical mechanism (e.g., pivot for joystick, light sensor for light pen) and its primary function (e.g., game control, direct screen interaction).

 

Question 6. Give the name of types of plotter.
Answer: The main types of plotters are Drum Plotters and Flatbed Plotters. Drum plotters use a drum to move the paper, while flatbed plotters hold the paper flat on a table. Both types use pens to draw continuous lines, making them suitable for large-scale and precise graphics. There are also electrostatic plotters which use charged paper and toner. Each type has specific applications based on size and precision needs.
In simple words: Two main types of plotters are drum plotters and flatbed plotters, which draw big pictures using pens.

🎯 Exam Tip: When listing types of devices, briefly mention a key characteristic or the working principle of each type to provide a more complete answer.

IV. Long Answer Type Questions

 

Question 1. How Does a Dot Matrix Printer Work? Explain it with diagram.
Answer: A dot matrix printer creates text and images on paper by using a printhead that has many small metal pins. These pins hit an inked ribbon, which then makes tiny dots on the paper to form letters and pictures. Unlike typewriters, these printers can make different shapes and fonts because they use many small dots instead of fixed characters. However, printouts often look a bit "dotted" and the printers can be noisy. The quality depends on how many pins the printhead has, usually from 9 to 24 pins, with more pins making clearer prints. This physical impact method is what makes them unique. (A diagram would typically show the printhead with pins, ribbon, and paper to illustrate the impact process).
In simple words: A dot matrix printer works by using tiny pins to hit an ink ribbon, which then puts small dots on the paper to create words and pictures. The number of pins makes the print clear.

🎯 Exam Tip: To fully explain how a dot matrix printer works, mention the key components (printhead, pins, ribbon), the printing mechanism (impact), and the resulting print quality (dotted appearance).

 

Question 2. How many types of monitors? Explain with diagram
Answer: Monitors, also called visual display units, are electronic screens that show information from a computer. They act as a window for users to interact with the computer. Monitors come in various designs, but they are mainly divided into three types based on the technology they use:
1. **CRT (Cathode Ray Tube) Monitors:** These are older, bulky monitors with a vacuum tube inside. An electron gun shoots a beam of electrons at a fluorescent screen, which creates the image. CRTs are reliable and can produce good picture quality, but they take up a lot of space. The electrons hit phosphor dots on the screen to light them up.
2. **LCD (Liquid Crystal Display) Monitors:** These are thinner, flat-panel monitors that use liquid crystals. A layer of liquid crystals is placed between two transparent plates with filters. Light passes through these crystals, which can be made to twist or untwist to block or allow light, creating the image. LCDs are popular for being thin and clear, and they are energy-efficient.
3. **LED (Light-Emitting Diodes) Monitors:** These are the newest flat-panel monitors. They are similar to LCDs but use light-emitting diodes (LEDs) for backlighting instead of the older cold cathode fluorescent lamps (CCFLs). This makes LED monitors even thinner, more power-efficient, and capable of producing better contrast and brightness. They are considered environmentally friendly. (A diagram would typically show the internal structure of each monitor type, highlighting the screen, backlight, and electron gun for CRT).
In simple words: Monitors show computer information on a screen. There are three main types: CRT (old, big tube), LCD (thin, uses liquid crystals), and LED (thinnest, uses small lights for better picture and less power).

🎯 Exam Tip: When explaining monitor types, describe the core technology (e.g., electron beam, liquid crystals, LED backlighting) and a key characteristic (e.g., bulky, thin, power-efficient) for each.

 

Question 3. Explain hard disk structure and working with diagram.
Answer:
**Hard Disk Structure:** A hard disk is made of several rigid, circular plates called platters, stacked on top of each other. Each platter has a smooth, magnetic surface. Each surface of a platter is divided into many concentric rings called tracks. These tracks are further broken down into smaller sections called sectors. A sector is the smallest unit that can store data, typically 512 bytes. All tracks that are at the same distance from the center across all platters form a 'cylinder'. A spindle motor rotates these platters at high speeds.
**Working:** When the computer needs to read or write data, read/write heads move across the platters. These heads float very close to the surface of the spinning platters without touching them. Data is stored magnetically as tiny positive or negative charges on the platters. When the head passes over a track, it can sense these magnetic changes (reading) or create new ones (writing). This continuous spinning and precise movement of the heads allow for quick access to vast amounts of data. (A diagram would typically show stacked platters, a spindle, read/write heads on actuator arms, and labels for tracks and sectors).
In simple words: A hard disk has spinning plates called platters, which have tracks and sectors where data is saved. Small heads move over these plates to read and write information quickly.

🎯 Exam Tip: For structure and working questions, clearly define key components like platters, tracks, and sectors, then explain how these components interact to store and retrieve data.

 

Question 4. What is CD-ROM? Explain its uses.
Answer:
**What is CD-ROM?** CD-ROM stands for Compact Disc Read-Only Memory. It is a type of optical disc that can store a large amount of digital data, including text, graphics, and even hi-fi stereo sound. Once data is written to a CD-ROM, it cannot be changed or erased; you can only read from it. A standard CD-ROM is 120 mm (about 4.75 inches) in diameter and 1.2 mm thick. It's made of polycarbonate plastic with reflective metal layers and a protective lacquer.
**Uses:** CD-ROMs were widely used for:
1. **Software Distribution:** They were commonly used to distribute computer software, operating systems, and large applications.
2. **Multimedia Storage:** Due to their capacity, they stored games, encyclopedias, and educational content that included text, images, and audio.
3. **Data Backup:** Although read-only, they were sometimes used for archiving data that didn't need to be updated.
4. **Music and Video:** While initially for music, CD-ROMs could also store video clips and other multimedia files.
CD-ROM drives in computers can read both data CD-ROMs and audio CDs.
In simple words: A CD-ROM is a disc that stores digital information like words, pictures, and music. Once information is put on it, you can only read it, not change it. It was used to give out computer programs and store many kinds of media.

🎯 Exam Tip: Define the acronym (CD-ROM) and clearly state its "read-only" characteristic. Then list diverse applications to show its versatility in data distribution.

 

Question 5. Explain types of printers and also explain their working.
Answer: A printer is an electronic machine that takes text and pictures from a computer and puts them onto paper. Printers connect to computers to get data and print it out. There are many kinds of printers with different features, from printing simple black and white words to colorful graphic images.
Printers are broadly divided into two main categories:
1. **Impact Printers:** These printers work by physically hitting a print head against an inked ribbon, which then presses onto the paper to create a mark. They make noise because of the impact. Examples include:
* **Dot Matrix Printers:** Use tiny pins to strike the ribbon, forming characters from small dots. They are good for printing multiple copies with carbon paper.
* **Daisy Wheel Printers:** Use a wheel with characters embossed on its petals. A hammer strikes a petal against an ink ribbon to print a character. They produce high-quality text but cannot print graphics.
2. **Non-Impact Printers:** These printers create text and images without any physical contact between the printing element and the paper. They are generally quieter and faster, and produce higher quality output. Examples include:
* **Inkjet Printers:** They work by spraying tiny drops of liquid ink onto the paper through small nozzles. Different colors of ink can be used to produce full-color images. They are popular for home and small office use due to their good quality and reasonable cost.
* **Laser Printers:** These printers use photocopy technology. A laser beam draws an image on a photosensitive drum, which then attracts dry powdered ink called toner. This toner is transferred to the paper and fused with heat to create the final print. Laser printers are known for their high speed and excellent quality, especially for text, and are widely used in offices.
In simple words: Printers turn computer files into paper copies. There are two main kinds: Impact printers, like dot matrix, hit the paper with ink. Non-impact printers, like inkjet and laser, spray ink or use light and powder without touching the paper.

🎯 Exam Tip: When explaining printer types, always clearly define the core working principle (impact vs. non-impact) and provide specific examples with a brief description of how each works.

 

Question 15. Which of the following category is not included in Micro computers?
(a) Tablet PC
(b) Laptop computer
(c) Super computer
(d) Handheld devices
Answer: (c) Super computer
In simple words: Super computers are very powerful and large, designed for complex tasks, and are not considered microcomputers. Microcomputers are smaller, single-user devices like laptops or tablets.

🎯 Exam Tip: Remember that microcomputers are designed for individual users, while supercomputers are built for massive computations for many users or complex scientific problems.

 

Question 16. This memory requires less power and has a great speed. It is majorly used in Intel Pentium 4 systems.
(a) DRAM
(b) SRAM
(c) DDR
(d) SDRAM
Answer: (c) DDR
In simple words: DDR (Double Data Rate) memory uses less power and works at high speeds. It was commonly found in older computer systems, helping them run fast.

🎯 Exam Tip: Keep in mind that DDR, SDRAM, and DRAM are all types of RAM, but they differ in speed, power consumption, and how data is transferred.

 

Question 17. Data is stored in computers in the form of
(a) Characters
(b) Numbers
(c) Binary digits
(d) All of the options
Answer: (c) Binary digits
In simple words: All data inside a computer is stored using binary digits, which are just zeros and ones. Even characters and numbers are converted into these binary digits for the computer to understand and process them.

🎯 Exam Tip: Always remember that the fundamental language of computers is binary, representing all information as a series of 0s and 1s.

 

Question 19. Arrange the units of memory in ascending order.
(a) Bit, Byte, Megabyte, Kilobyte
(b) Bit, Byte, Kilobyte, Megabyte
(c) Bit, Kilobyte, Byte, Terabyte
(d) None of the options
Answer: (b) Bit, Byte, Kilobyte, Megabyte
In simple words: From smallest to largest, memory units go: Bit, then Byte, followed by Kilobyte, and finally Megabyte. Each unit is a multiple of the one before it, showing how data size increases.

🎯 Exam Tip: Memorize the common hierarchy of memory units (bit, byte, KB, MB, GB, TB) and their relationships to ensure correct ordering.

 

Question 20. What does MIPS stand for?
(a) Mental Input Processing System
(b) Millions of Instructions Per Second
(c) Most Intelligent Processing System
(d) None of the options
Answer: (b) Millions of Instructions Per Second
In simple words: MIPS means Millions of Instructions Per Second. It is a way to measure how fast a computer's processor can work by counting how many instructions it completes in one second.

🎯 Exam Tip: MIPS is a performance metric for CPUs, indicating how many basic operations they can execute per second, giving an idea of processor speed.

 

Question 21. Which of the following is/are units of memory?
(a) Metre
(b) Kilobyte
(c) Tbyte
(d) All the above
Answer: (b) Kilobyte
In simple words: A Kilobyte is a way to measure computer memory, commonly used to describe the size of files or storage space.

🎯 Exam Tip: Be careful with units; metre measures length, while kilobyte and terabyte (Tbyte) measure digital storage capacity.

 

Question 22. What kind of hardware is used in the input phase of a computer-based information system?
(a) Input devices like keyboard, mouse, or scanner
(b) Output devices like monitor or printer
(c) Storage devices like hard drive
(d) Processing devices like CPU
Answer: (a) Input devices like keyboard, mouse, or scanner
In simple words: In a computer system, hardware used during the input phase includes devices like keyboards, mice, and scanners. These tools allow users to feed raw data and commands into the computer.

🎯 Exam Tip: Input devices are crucial for getting information into the computer, acting as the primary point of interaction between user and machine.

 

Question 23. Which type of mouse uses Light-Emitting Diode (led) to detect the movement of cursor on the screen?
(a) Optical
(b) Mechanical
(c) Laser
(d) All of them
Answer: (a) Optical
In simple words: An optical mouse uses a Light-Emitting Diode (LED) and a small camera to detect movement. It tracks how the surface underneath changes to move the cursor on the screen.

🎯 Exam Tip: Optical mice are popular for their precision and lack of moving parts compared to older mechanical mice, making them less prone to dust issues.

 

Question 24. Dot matrix is a type of.
(a) Tape
(b) Printer
(c) Disk
(d) Bus
Answer: (b) Printer
In simple words: A dot matrix is a type of printer. These printers create images and text by striking small pins against an ink ribbon, forming patterns of dots on the paper.

🎯 Exam Tip: Dot matrix printers are known for being impact printers, often used for printing multi-part forms due to their ability to create carbon copies.

 

Question 25. A group of 8 bits is called
(a) Byte
(b) Word
(c) Record
(d) File
Answer: (a) Byte
In simple words: A collection of 8 bits is known as a Byte, which is a fundamental unit of digital information in computing. Bytes are used to represent characters, numbers, and other data in computers.

🎯 Exam Tip: Understand the difference between a bit (the smallest unit, 0 or 1) and a byte (a group of 8 bits), as this is fundamental to computer memory.

 

Question 26. The data stored in-is lost when the computer power is turned off.
(a) Hard disk
(b) ROM
(c) CD
(d) RAM
Answer: (d) RAM
In simple words: Data stored in RAM (Random Access Memory) is lost when the computer is turned off. RAM is a type of temporary memory where the computer keeps information it is actively using, so it needs constant power.

🎯 Exam Tip: Distinguish between volatile memory (like RAM, which needs power to retain data) and non-volatile memory (like ROM or hard drives, which retain data even without power).

 

Question 28. ALU stands for
(a) Any Logical Unit
(b) Arithmetic Logic Unit
(c) Abraham Lincoln University
(d) Academy of Life Underwriting
Answer: (b) Arithmetic Logic Unit
In simple words: ALU means Arithmetic Logic Unit. This part of the computer's central processing unit (CPU) is responsible for performing all arithmetic operations, like addition and subtraction, and logical operations, such as comparisons.

🎯 Exam Tip: The ALU is a core component of the CPU, handling the fundamental calculations and comparisons that enable a computer to process information.

 

Question 29. ____ printer uses a beam of laser for printing.
(a) Dot matrix
(b) Inkjet
(c) Laser
(d) Drum
Answer: (c) Laser
In simple words: A laser printer uses a laser beam to create images and text on paper. The laser draws the image onto a drum, which then attracts toner powder, and this powder is transferred to the paper.

🎯 Exam Tip: Laser printers are known for their high speed and quality, especially for text, making them common in offices and professional environments.

 

Question 30. Mouse performs two of the most common actions, one is click and the second is
(a) Double click
(b) Dragging
(c) Moving
(d) Selecting
Answer: (a) Double click
In simple words: The two most common actions performed by a mouse are clicking and double-clicking. These actions are fundamental for interacting with items on a computer screen.

🎯 Exam Tip: While a mouse can also drag, move, and select, clicking and double-clicking are the most frequent actions for opening files or activating functions.

 

Question 32. OCR stands for
(a) Optical Character Reader
(b) Only Character Reader
(c) Optical Character Recognition
(d) Operational Character Reader
Answer: (a) Optical Character Reader
In simple words: OCR stands for Optical Character Reader. This technology allows computers to read and understand text from images or scanned documents.

🎯 Exam Tip: OCR is a powerful tool for converting scanned paper documents into editable digital text, saving time and effort in data entry.

 

Question 33. Which among the following is a type of printer?
(a) Disk
(b) Bus
(c) Plotter
(d) Dot matrix
Answer: (d) Dot matrix
In simple words: Out of the choices, a Dot matrix is a kind of printer that uses tiny dots to form words and images on paper.

🎯 Exam Tip: Remember that plotters are also printing devices, but they specialize in large-format graphics rather than typical text documents like dot matrix printers.

 

Question 34. Which of the following is not an input device?
(a) Keyboard
(b) Mouse
(c) Joystick
(d) Plotter
Answer: (d) Plotter
In simple words: A plotter is an output device, not an input device. It is used to print high-quality graphics and large drawings. Keyboards, mice, and joysticks are all used to input information into a computer.

🎯 Exam Tip: Clearly differentiate between input devices (which send data to the computer) and output devices (which receive data from the computer and display or print it).

 

Question 35. ____ stores data that is required by the CPU.
(a) RAM
(b) ROM
(c) Hard Disk
(d) Cache
Answer: (a) RAM
In simple words: RAM (Random Access Memory) stores data that the CPU needs to access quickly and frequently. It acts as a temporary workspace for the CPU.

🎯 Exam Tip: RAM is crucial for multitasking; the more RAM a computer has, the more programs and data it can handle at once without slowing down.

 

Question 36. A computer stores data internally in the form of ____ numbers.
(a) Binary
(b) Data
(c) MICR
(d) ASCII
Answer: (d) ASCII
In simple words: A computer stores data internally in the form of ASCII (American Standard Code for Information Interchange) numbers. This system assigns a unique number to each character, which the computer then translates into binary for internal processing.

🎯 Exam Tip: Remember that while computers fundamentally use binary, ASCII is a standard way to represent text characters as numbers before they are converted into binary for storage and processing.

 

Question 37. One kilobyte is equal to ____ bytes.
(a) 1024
(b) 10024
(c) 500
(d) 8
Answer: (a) 1024
In simple words: One kilobyte is equal to 1024 bytes. This number is based on powers of 2 ( \( 2^{10} \) ), which is typical in computer memory measurements.

🎯 Exam Tip: In computing, units of measurement like kilobytes and megabytes are typically based on powers of 2 (1024), not powers of 10 (1000).

 

Question 38. The ____ is one of the most vulnerable devices in a computer.
(a) Keyboard
(b) Hard disk
(c) Speaker
(d) Monitor
Answer: (b) Hard disk
In simple words: The hard disk is one of the most vulnerable devices in a computer because it contains all the important data and has moving parts that can fail physically. Losing a hard disk usually means losing all your saved information.

🎯 Exam Tip: Always back up important data from your hard disk regularly, as it is a mechanical device susceptible to failure and data loss.

 

Question 39. Printer that does not establish any mechanical contact between the print head and paper is known as
(a) Non-impact
(b) Impact
(c) Dot-matrix
(d) Daisy wheel
Answer: (a) Non-impact
In simple words: A printer that does not make any physical contact between its print head and the paper is known as a non-impact printer. These printers use technologies like inkjet or laser to form characters without striking the paper.

🎯 Exam Tip: Non-impact printers are typically quieter and produce higher quality graphics than impact printers, which physically strike the paper.

 

Question 41. You can perform arithmetic operations in a computer by
(a) Monitor
(b) ALU
(c) Control unit
(d) RAM
Answer: (b) ALU
In simple words: You can perform arithmetic operations in a computer using the ALU (Arithmetic Logic Unit). The ALU is a key component of the CPU specifically designed to handle all mathematical calculations and logical comparisons.

🎯 Exam Tip: The ALU is a crucial part of the CPU, responsible for all the calculations and logical comparisons a computer makes during processing.

 

Question 42. Which two symbols are used by the binary system?
(a) 0,1
(b) 1,5
(c) 0,0
(d) 1,1
Answer: (a) 0,1
In simple words: The binary system uses only two symbols: 0 and 1. This base-2 number system is the foundation for all digital data representation in computers.

🎯 Exam Tip: All computer data, from text to images, is ultimately represented and processed using combinations of these two binary digits.

 

Question 43. Which of the following are not examples of nonimpact printer?
(a) Daisy wheel
(b) Laser
(c) Dot Matrix
(d) Plotter
Answer: (b) Laser
In simple words: A laser printer is a type of non-impact printer, meaning it does not physically strike the paper to create text or images. Instead, it uses a laser beam and toner powder to print, resulting in high-quality output.

🎯 Exam Tip: Remember that laser printers, along with inkjet printers, fall under the category of non-impact printers due to their printing mechanism.

 

Question 45. Who is the inventor of Q WERTY keyboard?
(a) John
(b) T. Edison
(c) John McCain
(d) Christopher Sholes
Answer: (d) Christopher Sholes
In simple words: The inventor of the QWERTY keyboard layout is Christopher Latham Sholes. He developed this arrangement for typewriters in the 1870s to prevent jams by separating common letter pairs.

🎯 Exam Tip: The QWERTY layout, despite its age, remains the most common keyboard design due to its historical adoption with typewriters.

 

Question 46. .........was created by Ralph H. Baer in 1967.
(a) Monitor
(b) Keyboard
(c) Mouse
(d) Joystick
Answer: (d) Joystick
In simple words: The first home video game console, known as the "Brown Box", was created by Ralph H. Baer in 1967. This console was primarily operated using joysticks for gameplay.

🎯 Exam Tip: Ralph H. Baer is often called the "Father of Video Games" for his pioneering work in creating the first home video game console.

 

Question 47. Which of the following is not an I/O device?
(a) Printer
(b) CPU
(c) Plotter
(d) Scanner
Answer: (b) CPU
In simple words: The CPU (Central Processing Unit) is not an I/O (Input/Output) device; it is the "brain" of the computer that processes information. Printers and plotters are output devices, while scanners are input devices.

🎯 Exam Tip: Differentiate clearly: I/O devices handle data flow in/out of the computer, while the CPU performs internal processing.

 

Question 48. Which of the following is not a pointing device?
(a) Keyboard
(b) Mouse
(c) Joystick
(d) Light Pen
Answer: (a) Keyboard
In simple words: A keyboard is not a pointing device; it is primarily an input device for typing text and commands. Mouse, joystick, and light pen are all examples of pointing devices used to control the cursor or select items on a screen.

🎯 Exam Tip: Pointing devices allow you to move a cursor or select items visually on a screen, which is different from typing text via a keyboard.

 

Question 49. Which of the following is not a storage device?
(a) CD ROM
(b) DVD
(c) Plotter
(d) Flash drive
Answer: (c) Plotter
In simple words: A plotter is not a storage device; it is an output device used for printing large-format graphics and designs. CD-ROMs, DVDs, and flash drives are all types of devices used to store data.

🎯 Exam Tip: Storage devices save data for later use, while output devices (like plotters) present processed data to the user.

 

Question 50. Out of the following, whom do you think is the most probable user of a Light Pen?
(a) Computer Programmer
(b) Graphic Designer
(c) Journalist
(d) Scientist
Answer: (b) Graphic Designer
In simple words: A graphic designer is the most probable user of a light pen. Light pens allow for precise drawing and selection directly on a screen, which is very useful for design work and computer-aided design (CAD).

🎯 Exam Tip: Light pens offer direct interaction with the screen, making them suitable for tasks requiring detailed drawing or sketching in digital environments.

 

Question 51. Name the type of mouse which uses laser technology to detect the motion of the ball.
(a) Optical mouse
(b) Mechanical mouse
(c) Opto Mechanical mouse
(d) All of these
Answer: (a) Optical mouse
In simple words: An optical mouse uses laser technology to detect its movement on a surface, which then translates into cursor motion on the screen. Unlike older mechanical mice, optical mice do not use a physical ball.

🎯 Exam Tip: Optical and laser mice track movement digitally, offering greater precision and fewer maintenance issues than ball-based mechanical mice.

 

Question 52. Which is a vector based graphical printing device?
(a) Printers
(b) Plotters
(c) Scanners
(d) Digital Cameras
Answer: (b) Plotters
In simple words: A plotter is a vector-based graphical printing device. Unlike regular printers that use pixels, plotters draw continuous lines and curves, making them ideal for high-precision architectural and engineering drawings.

🎯 Exam Tip: Plotters are specifically designed for large, detailed drawings that require smooth lines and precise scaling, which is a strength of vector graphics.

 

Question 54. The diameter of the standard CD is
(a) 70 mm
(b) 80 mm
(c) 120 mm
(d) 180 mm
Answer: (c) 120 mm
In simple words: The standard diameter of a compact disc (CD) is 120 millimeters (approximately 4.7 inches). This size allows CDs to store a large amount of digital data, such as music or computer files.

🎯 Exam Tip: Know the common physical specifications of storage media, as these details often appear in basic computer knowledge questions.

 

Question 55. The speed of a Dot Matrix printer is measured in
(a) dpi
(b) cps
(c) bits
(d) All of these
Answer: (a) dpi
In simple words: The speed of a Dot Matrix printer, in terms of output quality, is often associated with DPI (dots per inch). While often associated with resolution, a higher DPI can also relate to the speed at which detailed images are produced.

🎯 Exam Tip: While CPS (characters per second) is the primary speed metric for dot matrix printers, DPI (dots per inch) is crucial for understanding the clarity and detail of their printed output.

 

Question 56. Dot-Matrix printer is a type of.
(a) Impact printer
(b) Non Impact printer
(c) Manual printer
(d) Matrix printer
Answer: (a) Impact printer
In simple words: A Dot-Matrix printer is a type of impact printer. These printers create text and images by physically striking a set of pins against an ink ribbon, which then transfers ink onto the paper.

🎯 Exam Tip: Impact printers use physical force to transfer ink, making them distinct from non-impact printers like inkjet or laser printers.

 

Question 58. A laser printer uses
(a) Heat sensitive paper
(b) Spray ink
(c) Photocopy technology
(d) None of these
Answer: (c) Photocopy technology
In simple words: A laser printer uses photocopy technology to print. This involves using a laser to create an electrostatic image on a drum, which then attracts toner powder, and finally transfers and fuses it to the paper with heat.

🎯 Exam Tip: Understanding the underlying technology of printers helps explain their quality, speed, and cost, with laser printers excelling in speed and crisp text output.

 

Question 59. Which of the following is used as an internal memory?
(a) CD ROM
(b) PROM
(c) Hard disk
(d) Memory stick
Answer: (b) PROM
In simple words: PROM (Programmable Read-Only Memory) is used as a type of internal memory in computers. It is a non-volatile memory that can be programmed once by the user.

🎯 Exam Tip: PROM is a form of ROM where the user can write data once, making it suitable for storing permanent programs or data that should not be changed.

 

Question 60. M1CR stands for
(a) Magnetic Ink Character Reader
(b) Magnetic Inch Character Reader
(c) Magnetic Ink Code Reader
(d) None of these
Answer: (a) Magnetic Ink Character Reader
In simple words: MICR stands for Magnetic Ink Character Reader. This technology is used primarily in banking to read special characters printed with magnetic ink on documents like checks, helping to process them quickly and accurately.

🎯 Exam Tip: MICR technology is crucial for efficient and secure processing of checks and other financial documents in the banking industry.

 

Question 61. The keyboard does not consist of.
(a) Numeric Keypad
(b) Function Keys
(c) Control Keys
(d) Mouse
Answer: (d) Mouse
In simple words: A keyboard does not consist of a mouse. While a keyboard includes elements like a numeric keypad, function keys, and control keys, a mouse is a separate input device used for pointing.

🎯 Exam Tip: Keyboards and mice are both essential input devices, but they perform different primary functions and are distinct components.

 

Question 62. Identify the picture.
(a) Barcode
(b) MICR code
(c) Memory Stick
(d) None of the above
Answer: (a) Barcode
In simple words: The picture shows a barcode. Barcodes are optical machine-readable representations of data, typically found on products, that contain information about the item.

🎯 Exam Tip: Barcodes are widely used for inventory management and point-of-sale systems, allowing quick and accurate identification of products.

 

Question 63. Which of these secondary devices has the maximum data storage capacity?
(a) Memory Stick
(b) Floppy
(c) CDROM
(d) Blu-ray
Answer: (d) Blu-ray
In simple words: Among the given secondary storage devices, a Blu-ray disc has the maximum data storage capacity. Blu-ray discs can store significantly more data than memory sticks, floppy disks, or CD-ROMs, often up to 50 GB or more for dual-layer discs.

🎯 Exam Tip: Blu-ray discs offer the highest storage capacity among optical media, making them suitable for high-definition video and large data backups.

 

Question 64. This code is generally observed at the bottom of all bank cheque. 'What is it called?
(a) Magnetic Code
(b) Magnetic Code Reader
(c) Bar Code
(d) None of the above
Answer: (a) Magnetic Code
In simple words: The code found at the bottom of bank checks is called a Magnetic Code, or more specifically, MICR (Magnetic Ink Character Recognition) code. It is printed with special magnetic ink that allows machines to read it quickly for bank processing.

🎯 Exam Tip: MICR codes on checks are essential for automating the processing of financial documents, ensuring speed and reducing errors in banking operations.

II. Very Short Answer Type Questions

 

Question 1. What do you mean by input devices?
Answer: Input devices are hardware components that allow users to send data, commands, and information into a computer system. They act as a bridge between the user and the computer, translating human actions into machine-readable signals. Common examples include keyboards, mice, and scanners.
In simple words: Input devices are tools like keyboards and mice that let you put information and commands into a computer.

🎯 Exam Tip: When defining input devices, always mention their primary function: to feed data or instructions into a computer for processing.

 

Question 3. What do you mean by Control Unit?
Answer: The Control Unit (CU) is a part of the computer's Central Processing Unit (CPU) that manages and coordinates all the operations within the computer system. It interprets instructions, directs the flow of data, and tells other components what to do and when to do it. The CU ensures that all parts of the computer work together smoothly.
In simple words: The Control Unit is like the brain's manager; it guides and controls all the computer's actions by telling other parts what to do.

🎯 Exam Tip: Emphasize that the Control Unit's main role is to manage and coordinate operations, making it the "traffic cop" of the CPU.

 

Question 4. What is the function of Arithmetic and Logic Unit?
Answer: The Arithmetic Logic Unit (ALU) performs all mathematical calculations, such as addition, subtraction, multiplication, and division. It also handles logical operations, like comparing numbers or data to determine if one is greater than, less than, or equal to another. These operations are crucial for decision-making within the computer.
In simple words: The ALU does all the math and comparing tasks inside the computer, helping it make decisions by processing numbers.

🎯 Exam Tip: Clearly state both arithmetic (calculations) and logic (comparisons) as the two main functions of the ALU.

 

Question 5. Define keyboard.
Answer: A keyboard is an essential input device that allows users to enter text, numbers, and symbols into a computer. It has keys arranged similarly to a typewriter, and often includes a numeric keypad for quick number entry and special function keys for specific commands. Keyboards are the primary tool for text-based data entry.
In simple words: A keyboard is an input device, much like a typewriter, used to type letters, numbers, and symbols into a computer.

🎯 Exam Tip: When defining hardware, always mention its category (input/output) and its primary function for users.

 

Question 6. What is scanner? How many types of scanner are available in the market?
Answer: A scanner is a device that captures images from paper documents, photographs, or physical objects and converts them into digital files that a computer can understand. It helps to digitize physical content. Common types of scanners available in the market include handheld scanners, flatbed scanners, and drum scanners, each suited for different scanning needs.
In simple words: A scanner turns pictures or papers into digital files for the computer. You can find handheld, flatbed, and drum scanners.

🎯 Exam Tip: Name at least two common types of scanners and briefly explain their purpose to score full marks.

 

Question 7. What is a CPU?
Answer: The CPU, or Central Processing Unit, is often called the "brain" of the computer because it performs most of the processing and controls all computer operations. It executes instructions, processes data, and manages all other components of the computer system. Without a CPU, a computer cannot function.
In simple words: The CPU is like the computer's brain; it does all the main work and manages how the computer runs.

🎯 Exam Tip: Always describe the CPU as the "brain" of the computer and mention its primary role in processing data and executing instructions.

 

Question 1. Which output device is used to produce graphical plots on paper or polyester films? Explain its functioning.
Answer: A plotter is an output device specifically designed to produce high-quality graphical plots, charts, and drawings on large sheets of paper or polyester films. Plotters function by using pens or other drawing tools to draw continuous lines based on vector data received from the computer. This precision makes them ideal for detailed architectural and engineering designs, as well as maps and blueprints.
In simple words: Plotters are special printers that draw detailed pictures and designs on large paper or film. They use pens to make accurate lines for things like building plans.

🎯 Exam Tip: Highlight "vector-based" and "continuous lines" when explaining plotters, as these distinguish them from pixel-based printers.

 

Question 2. Write the characteristics of Non-Impact printers.
Answer: Non-impact printers create images and text on paper without any physical contact between the print head and the paper. They are generally much quieter in operation compared to impact printers. These printers often produce higher print quality, suitable for detailed graphics and sharp text, and can typically print in color. Technologies used include inkjet and laser.
In simple words: Non-impact printers don't touch the paper to print. They are quiet, make good quality prints, and can print in color.

🎯 Exam Tip: Focus on "no physical contact," "quieter," and "higher quality/color capability" as key characteristics of non-impact printers.

 

Question 3. What is a microphone? Describe its usage.
Answer: A microphone is an input device that converts sound waves into electrical signals, which can then be recorded or processed by a computer. Microphones are commonly used for recording voice, participating in video calls and online meetings, using speech recognition software for voice commands, and adding narration to presentations or videos. Most laptops have built-in microphones, while desktop computers may require external ones. This allows for communication and audio input into digital systems.
In simple words: A microphone is a tool that takes your voice or sounds and turns them into computer signals. People use it for recording, talking in video calls, or telling the computer what to do.

🎯 Exam Tip: Define the microphone as an input device for sound and list at least three common uses, such as recording, communication, and voice commands.

 

Question 4. What is a monitor? How many types of monitor are available in the market?
Answer: A monitor, also known as a visual display unit, is an output device that shows the user interface and all the information processed by the computer on its screen. It allows users to see and interact with the computer's output. Monitors are classified based on the display technology they use. The two main types commonly available in the market are Cathode Ray Tube (CRT) monitors, which are older and bulkier, and Liquid Crystal Display (LCD) monitors, which are thinner and more modern.
In simple words: A monitor is a screen that shows you what your computer is doing. The two main kinds are old CRT screens and newer LCD screens.

🎯 Exam Tip: When explaining monitors, state its function as an output device and clearly list the main types (CRT and LCD) distinguishing them by their technology.

 

Question 6. What is a light pen?
Answer: A light pen is a pointing device shaped like a pen. It has a special sensor inside. When you point the pen at a computer screen, it detects light from that spot. This creates a signal that goes to the computer, telling it where you are pointing. This allows users to interact with the screen directly, similar to drawing on paper. Light pens are often used in design work, like for computer-aided design (CAD) applications.
In simple words: A light pen is a pen-shaped tool used to point at things or draw on a computer screen, sending signals to the computer about where you are touching.

🎯 Exam Tip: When explaining input devices, always describe both what the device is and how it functions, mentioning common uses.

 

Question 7. Name two distinct categories of printers.
Answer: There are two main kinds of printers: Impact printers and Non-impact printers.

• **Impact printers:** These printers touch the paper directly with a print head. Examples include line printers, drum printers, and dot-matrix printers.
• **Non-impact printers:** These printers do not touch the paper to print. They were made to be faster and quieter than older impact printers. The printing method directly affects the speed and quality of the output. Inkjet and laser printers are examples of non-impact printers.

In simple words: The two main types of printers are impact printers (which touch the paper) and non-impact printers (which do not touch the paper).

🎯 Exam Tip: Clearly define the core difference between impact and non-impact printers and provide at least two examples for each type.

 

Question 8. What is an input device? Explain the input device that is used to convert handwritten text into machine readable format.
Answer: An input device lets you put data or information into a computer so it can be processed. A mouse is one example of an input device. The device that turns text from a printed page into something a computer can understand is called an Optical Character Reader (OCR). This technology is very helpful for digitizing old documents and making them editable. OCR uses light to scan characters and turns them into a digital format. This digital text can then be edited in programs like a word processor.
In simple words: An input device puts information into a computer. An Optical Character Reader (OCR) is an input device that reads printed text and turns it into digital text for the computer.

🎯 Exam Tip: For definitions, start with a clear, concise statement and then elaborate on its function and benefits.

 

Question 9. Which input device is used to play video games in a more interesting way? Explain why?
Answer: The input device used to play video games in a more engaging way is a joystick. It makes gaming more interesting because it gives players a feeling of controlling objects directly, like flying a plane. Joysticks provide a tactile and intuitive control experience, especially for simulation games. With a joystick, you can move game characters or vehicles in different directions, which feels more natural than using a keyboard.
In simple words: A joystick makes video games more fun because it lets you control things in the game more directly, like a real steering wheel or flight stick.

🎯 Exam Tip: When asked to explain 'why' a device is useful, focus on its specific features that enhance the user experience for that purpose.

 

Question 10. Define the different types of scanners.
Answer: There are three main kinds of scanners: Drum Scanners, Flatbed Scanners, and Handheld Scanners.

• **Drum Scanner:** These scanners use a spinning glass drum to scan items. They are very accurate and are mainly used by the publishing industry to get high-quality images for books.
• **Flatbed Scanner:** With a flatbed scanner, you place the item face down on a glass surface. A light scans the item, and special technology captures the image. These scanners are common in homes and offices.
• **Handheld Scanner:** This is a small device you move by hand over the item you want to scan. Each type of scanner offers different levels of precision and convenience for various scanning needs. It can be tricky to use because you need to hold it steady to avoid blurry images. They are often used in places like libraries or stores.

In simple words: Scanners are devices that turn paper documents into digital images. The three main types are drum scanners (for high quality), flatbed scanners (common for home and office), and handheld scanners (small, moved by hand).

🎯 Exam Tip: When listing and defining types, use clear headings for each type and provide a brief description and common application.

 

Question 11. Which technology is used in a Laser printer? What are its basic features?
Answer: Laser printers use a technology similar to photocopiers. They use a laser beam and a special dry ink powder called toner. This creates high-quality prints, including text and graphics. Their speed and precision make them essential for business and educational environments. Laser printers are best for printing a lot of pages quickly and with good quality. They have a very high resolution, usually from 600 to 1200 dots per inch (dpi).
In simple words: Laser printers use photocopier technology with a laser and dry ink powder (toner) to print very fast and with high quality, especially good for large print jobs.

🎯 Exam Tip: When discussing printer technologies, highlight the mechanism (e.g., laser beam, toner) and key performance indicators like speed and resolution.

 

Question 12. Write the applications of an LCD monitor.
Answer: LCD monitors are used in many places today. They are found in desktop computers, laptops, and televisions because they are thin and light. Their energy efficiency and compact design make them suitable for both portable and stationary devices. People also use them in smartphones, tablets, and even in car dashboards. They are good for showing clear images and videos.
In simple words: LCD monitors are used in many devices like computers, laptops, TVs, phones, and tablets because they are thin, light, and show clear pictures.

🎯 Exam Tip: When listing applications, think about different environments where the device is commonly found and its key benefits in those settings.

 

Question 13. Name the device that is used to manipulate information on a computer screen by directly touching it.
Answer: The device used to control information on a computer screen by touching it directly is a light pen. This direct interaction can make tasks like drawing or selecting items more intuitive for users.
In simple words: A light pen lets you control things on a computer screen by touching it directly.

🎯 Exam Tip: For naming questions, provide the specific term and briefly mention its primary function.

 

Question 14. Name the technique that is used to convert scanned image files into editable documents.
Answer: The method used to change scanned images of text into documents that you can edit is called OCR. This technology allows printed documents to be digitally converted and easily searched or modified. OCR stands for Optical Character Recognition.
In simple words: The process of turning scanned pictures of text into editable documents is called OCR, which means Optical Character Recognition.

🎯 Exam Tip: Remember that OCR is the key term for converting scanned text into editable digital format.

 

Question 15. What is MICR?
Answer: MICR stands for Magnetic Ink Character Recognition. It is a special way that banks read numbers printed with magnetic ink on cheques. This method helps prevent fraud and speeds up banking operations by making the characters machine-readable. This helps to process cheques quickly and safely.
In simple words: MICR (Magnetic Ink Character Recognition) is a banking technology that reads numbers printed with special magnetic ink on cheques, making them fast and secure to process.

🎯 Exam Tip: For acronyms, always state the full form and explain the primary use case, especially in specialized fields like banking.

 

Question 16. Give two advantages of laser and inkjet printers.
Answer: Here are two benefits for each type of printer:

• **Laser Printer:** 1. They print very fast, typically around 10-15 pages every minute. 2. It generally costs very little to operate them over a long period.
• **Inkjet Printer:** 1. They can print with very clear and fine details, offering higher resolution. 2. They are great for homes or small offices because they are often compact in size.

Both types offer distinct advantages depending on whether speed and volume or detailed color output are prioritized.
In simple words: Laser printers print fast and are cheap to run. Inkjet printers give higher quality prints and are small, good for home use.

🎯 Exam Tip: When comparing devices, clearly list specific advantages for each to show a comprehensive understanding.

 

Question 17. Look at your school computer and list 3 input and 3 output devices. Now, provide one line definition of each device.
Answer: Here are three input devices and three output devices commonly found with a computer, along with their definitions:

Input Devices:

• **Keyboard:** This device is used to type letters, numbers, and symbols into the computer.
• **Mouse:** This is a basic input device that helps control the pointer on the computer screen.
• **Scanner:** This device transfers text, drawings, and photos from paper into a computer.

Output Devices:

• **Monitor:** This output device shows the computer's screen and the information the user asked for.
• **Printer:** This device prints processed data, such as images and text, onto paper.
• **Speaker:** This output device takes sound signals from the computer and turns them into audible sound.

These devices are crucial for both giving instructions to the computer and receiving results from it.
In simple words: Input devices like keyboards, mice, and scanners help put information into the computer, while output devices like monitors, printers, and speakers help get information out.

🎯 Exam Tip: Choose common devices for your list and provide a very concise, one-sentence function for each.

 

Question 18. Identify the following devices:
(a) Keyboard
(b) Mouse
(c) Joystick
(d) Handheld Scanner
Answer: (a) Keyboard
In simple words: The picture shows a keyboard, which is a device for typing letters and numbers into a computer.

🎯 Exam Tip: Carefully observe images in identification questions and match them to the correct technical term.

 

Question 19. Which of the following statements is not correct?
(a) The device that lets you enter data or instructions in a computer is known as an input device.
(b) The name QWERTY comes from the first six letters of the top-left alphabet rowr of the keyboard.
(c) A mouse can perform four types of actions: click, select, drag, and double click.
(d) A barcode reader is an output device that is used to print the code on products.
Answer: (d) A barcode reader is an output device that is used to print the code on products.
In simple words: The incorrect statement is about the barcode reader. It is an input device that *reads* codes, not an output device that *prints* them.

🎯 Exam Tip: For 'not correct' questions, read each statement carefully and identify the one that contains a factual error or misrepresents a concept.

 

Question 21. What is the difference between RAM and ROM?
Answer: The difference between RAM and ROM are:

Understanding the difference between these two memory types is crucial for knowing how a computer stores and uses information.
In simple words: RAM is fast, temporary memory for active programs, while ROM is slower, permanent memory that holds startup instructions for the computer.

🎯 Exam Tip: For comparison questions, use clear, distinct points in a tabular format to highlight differences effectively, covering aspects like volatility, read/write capability, and purpose.