CBSE Class 3 Computer Know Your Computer Worksheet

Q.2. Write the LOGO command for the following:

a. Move the turtle forward by 40 steps
Answer: FD 40
In simple words: Use the FD command followed by the number of steps to move forward.

Exam Tip: Always put a space between the command acronym and the number.

Q.2. b. Move the turtle backward by 20 steps
Answer: BK 20
In simple words: Use the BK command to move the turtle backward.

Exam Tip: BK stands for Back.

Q.2. c. Rotate the head of the turtle towards right direction by 90 steps
Answer: RT 90
In simple words: Use RT to turn the turtle to the right.

Exam Tip: RT measures angles in degrees, referred to here as steps/degrees.

Q.2. d. Rotate the head of the turtle towards left Direction by 45 steps
Answer: LT 45
In simple words: Use LT to turn the turtle to the left.

Exam Tip: LT stands for Left Turn.

Q.2. e. Hide the turtle
Answer: HT
In simple words: HT makes the turtle invisible on the screen.

Exam Tip: HT stands for Hide Turtle.

Q.2. f. Make visible the hidden turtle
Answer: ST
In simple words: ST brings the turtle back into view.

Exam Tip: ST stands for Show Turtle.

Q.2. g. Lift the turtle's pen from screen
Answer: PU
In simple words: PU stops the turtle from drawing when it moves.

Exam Tip: PU stands for Pen Up.

Q.2. h. Put the turtle's pen down on the screen
Answer: PD
In simple words: PD allows the turtle to draw lines again as it moves.

Exam Tip: PD stands for Pen Down.

Q.2. i. To erase everything from the graphic area
Answer: CS
In simple words: CS clears the drawing and brings the turtle home.

Exam Tip: CS stands for Clear Screen.

Q.2. j. To bring the turtle to the middle of the screen
Answer: HOME
In simple words: HOME sends the turtle back to its starting position in the center.

Exam Tip: HOME also resets the turtle's heading.

Q.3. Give their full form:

a. LOGO : Answer: Language of Graphics Oriented
In simple words: LOGO is a computer programming language used for graphics and drawings.

Exam Tip: Learn the exact expansion of acronyms.

Q.3. b. FD : Answer: Forward
In simple words: Moves the turtle ahead.

Exam Tip: Short forms are called primitives.

Q.3. c. BK : Answer: Back
In simple words: Moves the turtle backward.

Exam Tip: Always check spelling for full forms.

Q.3. d. RT : Answer: Right Turn
In simple words: Turns the turtle to the right.
Exam Tip: Do not confuse RT with LT.

Q.3. e. LT : Answer: Left Turn
In simple words: Turns the turtle to the left.

Exam Tip: LT rotates the turtle counter-clockwise.

Q.3. f. HT : Answer: Hide Turtle
In simple words: Makes the turtle invisible.

Exam Tip: HT hides the cursor triangle.

Q.3. g. CS : Answer: Clear Screen
In simple words: Clears the graphics window.

Exam Tip: CS clears drawings instantly.

Q.3. h. PU : Answer: Pen Up
In simple words: Lifts the pen so no lines are drawn.

Exam Tip: PU stops drawing.

Q.3. i. PD : Answer: Pen Down
In simple words: Puts the pen down to resume drawing.

Exam Tip: PD starts drawing again.

Q.3. j. ST : Answer: Show Turtle
In simple words: Makes the turtle visible again.

Exam Tip: Opposite of HT.

Q.4. Match the following (Do not draw lines to match, put numbers in the boxes given)
1. BK      [ 5 ] Exit LOGO (Note: BYE exits LOGO; matching corresponds to correct pairs)
2. LT      [ 6 ] turns the turtle to the left
3. CS      [ 2 ] clears the figures
4. PU      [ 7 ] lifts the turtle's pen
5. FD      [ 4 ] moves the turtle forward
6. HOME   [ 3 ] brings turtle to the centre of the screen
7. BYE     [ 1 ] Exit LOGO
Answer: 1-5, 2-6, 3-2, 4-7, 5-4, 6-3, 7-1 (re-indexed based on standard option pairing: BK moves back, LT turns left, CS clears figures, PU lifts pen, FD moves forward, HOME brings to centre, BYE exits).
In simple words: Match each LOGO command to its correct action.

Exam Tip: Read both columns carefully before writing corresponding numbers.

Q.5. Fill ups

1. The LOGO screen is divided into two parts _________________________________ and _________________________________.
Answer: Main Screen, Commander Window
In simple words: The screen has a drawing area and a command area.

Exam Tip: Remember the two key components of MSWLogo.

Q.5. 2. The small triangle in the middle of the main screen is called the LOGO _______________________.
Answer: Turtle
In simple words: The pointer that draws on the screen is known as the turtle.

Exam Tip: The turtle has a head and a tail.

Q.5. 3. The middle of the LOGO screen is the ______________________ of the turtle.
Answer: Home
In simple words: The center position is called Home.

Exam Tip: HOME command sends the turtle back to this spot.

Q.5. 4. The LOGO commands are also called LOGO ____________________
Answer: Primitives
In simple words: Built-in commands in LOGO are called primitives.

Exam Tip: Learn the term 'Primitives'.

Q.5. 5. __________________ means the way in which the commands are written.
Answer: Syntax
In simple words: Syntax refers to the grammatical rules for writing commands.

Exam Tip: Incorrect syntax results in an error message in LOGO.

TOPIC – KNOW YOUR COMPUTER
 

Name the following :

Question. Converts hard copy into soft copy- ___________

Answer : Scanner

Question. It helps to listen music – ____________

Answer : Speakers

Question. 2 Input device - __________, ___________

Answer : mouse , scanner

Question. 2 Output device - _________, ___________

Answer : monitor, speakers 

Rearrange the Jumble words :

Question. MNOTIOR - ___________

Answer : MONITOR 

Question. SACNENR - ___________

Answer : SCANNER 

Question. HRADAWER - ___________

Answer : HARDWARE 

Question. MUOSE - ___________

Answer : MOUSE

Question. KYEOBARD – ___________

Answer : KEYBOARD

Question. JYOTSCIK - ___________

Answer : JOYSTICK 

Missing letters :

Question. S _ E _ K _R S

Answer : P, A, E 

Question. S _ F T _ A _ E

Answer : O, W, R

Question. F _O_ P Y

Answer : L, P

Question. P _I _ T _ R

Answer : R, N, E 

Question. P E _ D R _V E

Answer : N, I

Question. D _T _

Answer : A, A

Fill in the blanks :

Question. Printer makes a _________ copy of the processed information on paper.

Answer : Permanent

Question. _______is used to play games on computer.

Answer : Joystick

Question. ________ is known as VDU.

Answer : Monitor 

Question. __________ is a pointing device .

Answer : Mouse 

Question. Hardware equipment include ______and ___________.

Answer : CPU and Keyboard 

Q.1. Write the LOGO command for the following:

a. Move the turtle forward by 40 steps _________________________

b. Move the turtle backward by 20 steps _________________________

c. Rotate the head of the turtle towards right direction by 90 steps _________________________

d. Rotate the head of the turtle towards left Direction by 45 steps _________________________

e. Hide the turtle _________________________

f. Make visible the hidden turtle _________________________

g. Lift the turtle’s pen from screen _________________________

h. Put the turtle’s pen down on the screen _________________________

i. To erase everything from the graphic area _________________________

j. To bring the turtle to the middle of the screen _________________________

1 -Fill in the blanks :--

a- A group of instructions given to the computer to make it work are called software .

b- Two basic parts of the computer are hardware and software.

c- We can listen to sound using speakers and head phones.

d- Hardware devices can be classified as input devices , output devices, Storage devices and processing unit.

e- Input (Data + Instructions) + Processing = Output ( information)

2- Draw hardware devices used to :---

A- Input data :--

 

Write the full form of the following abbreviations :

Question. PD

Answer : Pen Drive.

Question. UPS

Answer : Uninterrupted Power Supply.

Question. DVD

Answer : Digital Versatile Disc.

Question. VDU

Answer : Visual Display Unit.

Question. USB

Answer : Universal Serial Bus.

True/False :

Question. A joystick is used to listen to music.

Answer : False

Question. A Keyboard has 105 keys.

Answer : True

Question. A scanner is used to play games on computer.

Answer : False

Question. A mouse usually has two buttons.

Answer : True

Question. Monitor is an input device.

Answer : False

Very Short Answer Type Questions :

Question. What is computer?
Answer : A computer is a device which runs on electricity and is used to process the data.

Question. What is the function of CPU?
Answer : CPU is called the brain of the computer. It performs calculations and comparisons.

Question. What is the difference between Scanner and Printer?
Answer :

Question. Name two components of a computer.
Answer : 1. Hardware
2. Software

1. Fill the correct word in the blanks.

Booting, Mouse pointer, Start, Windows, Operating system

a. _________ is the most common operating system.

b. _________ is a small arrow on the computer screen, which moves when you move your mouse.

c. ______________ controls overall working of the computer.

d. The _________ button is found on the extreme left corner of the taskbar.

e. _________ is the process in which operating system is loaded into computer’s memory.

2. Unscramble the scrambled words:

a. ESOUM __________

b. NSDOWIW ___________

c. INGARTEPO MESYTS_________

d. RTSATER __________

e. KEDSOPT _________

3. State whether the following sentences are True or False:

a. Linux is one of the most popular operating system software. ______

b. The mouse pointer is a small arrow on the computer screen. ______

c. Booting means that the computer shuts down and starts up again immediately. _______

d. Icon is a long colourful bar located at the bottom of the desktop. _______

e. The notification area does not include the volume bar. _______

A- Fill in the blanks:----
1- Tired 6- hospitals
2- Records 7-four
3- LCD 8-printer
4- Ticket reservation 9-multi tasking
5- Machine 10-control unit

B- Write True or False:-
1- False 6-False
2- False 7-False
3- False 8-False
4- False 9-False
5- False 10-False