Class 6 Chapter 12 Computer Virus

 Class 6 Chapter 12 Computer Virus

Q. 1. What are computer viruses? Mention any two examples of computer viruses.

 Ans: Computer virus is a self-replicating small program, which disturbs the normal functioning of the computer. I Love You, C-Brain, Time bomb, Aids, etc are examples of computer viruses. 

 Q.2. Mention any four sources of virus transfer. 

 Ans: The major sources of virus transfer are :

 1. Internet and email

 2. Pirated Software 

 3. Virus-infected games 

 4. Social sites. 

 Q.3. List any four symptoms that appear when your computer is affected by the virus.

 Ans: Some common symptoms that appear when your computer is affected by a virus are:

 a) Viruses slow down the computer processing. 

 b) Viruses reduce the memory of computers. 

 c) Viruses change the size of computer files. 

 d) Virus alter and hang the computer 

 e) Viruses may restart or shut down computer automatically. 

 Q.4. List any four preventive measures from viruses.

 Ans: Preventive measures from viruses are: 

 a) Install latest and updated antivirus

 b) Scan your computer with antivirus regularly.

 c) Not to use pirated software. 

 d) Not to use a virus-infected external disk. 

 e) Not to allow other people to use the computer without permission 

 f) Use password in the computer. 

 Q.5. What is antivirus? List any four antivirus software.

 Ans: Antivirus is a computer program, which is used to scan, locate and remove viruses from the computer system. Example of antivirus are: Norton Antivirus, Avira, Nod 32, AVG (Anti Virus Guard) etc.