CBSE Class 4 Computer Science Windows Accessories Notes

CBSE Class 4 Windows Accessories. Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts will help the student to understand the chapter and score better marks in the examinations. 

 UNIT-6

WINDOWS ACCESSORIES

Microsoft Windows Operating System provides various useful tools or software that can be used as and when we required. In order to access these tools goto

6.1 CALCULATOR : The calculator is very handy tools that will help you to do simple arithmetic calculations by using Simple Calculator and in order to do certain other mathematical computations you can use the Scientific calculator , that can be accessed by selecting Scientific option under View menu

6.2 ONSCREEN KEYBOARD : Sometimes it happen that your keyboard is not working, in such case you can use On-Screen keyboard to enter simple text by just clicking the particular keys using the mouse. The on-screen keyboard can be found under Ease of Access under Accessories section

6.3 MAGNIFIER : You can magnify the content of the screen by using Magnifier tool that can be accessed under Ease of Access of Accessories

6.4 GAMES : We all love to play computer game, for that we need to either install it or directly play from the CD or DVD. Microsoft in his various Operating Systems gives us the ways to play some popular PC games that are pre-installed with the operating system like Chess, Playing Cards etc. You can access these games by going under the Accessories.

6.5 VIRUS & ANTI-VIRUS : As we all know a computer virus can do a lot of harm to our computer system. It can corrupt our files and folders, it can corrupt the operating system and can also make some hardware components un-available to the user, that force use to format our computer system.

A computer virus is a program designed to harm or cause harm on an infected computer. Its spreads through e-mail attachments, portable devices, websites containing malicious/harmful scripts and file downloads. A computer virus attaches itself to the host files and always activate whenever you open the infected files. The virus can replicate itself and then infect the other files on your computer causing more damage. Some types of a virus are : File Infector viruses, Boot Infector viruses, Macro viruses, Polymorphic viruses etc.

In order to prevent our computer from getting infected with a computer virus, we need to install Anti-Virus software. Anti-Virus prevents our system from virus and also it can repair our files and folders if they are already infected. But in order to make an anti-virus effectively work, we need to update it regularly. Some of the anti-virus software available in the market are QuickHeal, Norton, Kaspersky, AVG, McAfee, K7 etc. Some antivirus software for Home or Educational purposes are also available on internet for freely downloadable such as Avast, Avira, Panda etc.

EXERCISE

Q 1. What is virus ?

Q 2. Write the different categories of viruses.

Q 3. Why we need Anti-virus?

Q 4. What is the use of Magnifier? How it can help to people having vision problem?

Q 5. Write the name of at least two games that you play on PC. Also write 2-2 points about those games.

LAB WORK

Q 1. Evaluate the following using Calculator and compare the result

a) 12+4-65/2*9

b) 4-65/2*9+12

c) 12-65/2*9+4

Q 2. Write a paragraph about your village using only on-screen keyboard.

Q 3. Write Roll no and name of your ten good friends using on-screen keyboard only

Please click the link below to download CBSE Class 4 Windows Accessories.