Question

E. Answer the following:
1.
What is a computer virus? Name its types.​

Answer 1

Computer Virus:-

• A computer virus is a set of programs that disrupts the normal functioning of a computer.

• A virus infects or destroys data.

• It enters inta a computer without the permission or knowledge of the user.

• VIRUS - Vital Information Resources Under Seize.

Types of Virus:-

• Viruses can be classified into 2 major categories:-

• Boot viruses:-

• These viruses infect the boot records or master boot records. They change the location of the boot record that is responsible for the loading the Operating System in the memory by copying it elsewhere. Boot virus become active at the time of booting the machine.

• Ex:- Disk killer, Stone virus, etc.

• Program file viruses:-

• These viruses infect the executable files or programs such as those with extension like .com, .exe, .ovl, .drv, .sys, etc. These programs get loaded in the memory during execution. The virus becomes active in memory by replicating itself and infecting files on the disk.

• Ex:- Sunday, Cascade, etc.

Know more:-

• Causitive agents:-

• Computer worms
• Trojans
• Malware
• Spyware
• Spam

• Protection:-

• Antivirus software
• Cyber crime

Answer 2

$\bf \huge \underline { Answer :-}$

A computer virus is a program or a set of progress that disrupts the normal functioning of a computer.

$\bf \large\underline { Types \: of \: Virus :-}$

• Boot sector virus
• Program file virus
• Multipartite virus
• Macro virus