Class 6 (A-F)

              Chapter 5 : Computer Virus

              Answers To Text Questions

A. Think and Tell

Q1 What are the symptoms of computer virus ?

Ans 1. Symptoms of a virus include : computer lockups, screen distortions data loss, unusual messages and reduced computer performance.

Q2 What is an Antivirus program?

Ans 2. AntiVirus programs check the files on our computer for viruses and also to remove the virus.

Q3 What is the full form of VIRUS ?

Ans 3. VIRUS stands for Vital Information Resources Under Seize

B. Very Short Answer Questions

Q1 What is a computer antivirus ?

Ans 1. A computer virus is a program that may cause harm to the computer.

Q2 Write the name of any three antivirus programs .

Ans 2. Norton, McAfee, Kaspersky

C. Short Answer Questions

Q1 What is a boot sector virus?

Ans 1. The boot sector is the area of a hard disk that stores valuable information. Boot sector viruses affects this area and cause damages.

Q2 Write short notes on: WORMS  and TROJANS .

Ans 2. Worms : A worm is a malicious program that duplicates itself. They eventually fill up the disks space with copies of itself and thereby makes a computer system to work very slow.

Trojans are viruses that at first appear to be friendly but they are very malicious programs which steal information from our computer. Even some computer games can be Trojan viruses.

Q3 Why it is necessary to scan an external device before using it ? Describe the process of scanning it.

Ans 3. It is necessary to Scan an external device before using it because it may contain virus and  get attached to the computeï.

Steps to scan an external device :

Step-1 : Attach an external device to the computer.

Step-2 : Click Full Scan option from the popup screen.

D. Long Answer Questions

Q1 Write the steps to scan your computer using Kaspersky Anti Virus program.

Ans l. Steps to scan your computer using Kaspersky AntiVirus

Step-l : Double-click the Kaspersky Internet Security icon from system tray on the  taskbar.

Step 2 :Click the Scan option,

Step-3: Click the Full Scan option to scan all the drives of your computer.

Step-4: After the scan is finished.

Step-5:Click the Close button to exit.

Q2 What  precautions you should take to protect your computer from a virus?

Ans. 1 We should not use a CD or pen drive received from another person unless we are certain that the disk does not contain a virus.

2 We should not download programs or other information from non-reputed sources on the Internet.

3 We should be careful of files we receive, attached to E-mail messages,

4.We should open onîy `those files sent by the people we h'ust.

5. We should install an AntiVirus program on our computer.

  Norton, McAfee etc.

6. AntiVirus software needs to be updated regularìy, so that it can detect new viruses.