What is a computer virus and types of virus in tutorial point?
Answers
A computer virus is actually a malicious software program or "malware" that, when infecting your system, replicates itself by modifying other computer programs and inserting its own code. Infected computer programs may include data files, or even the "boot" sector of the hard drive.
Answer:
what is virus?
virus is nothing but a piece of coding that enters your computer without your knowledge and infects it
types of virus :
1.boot sector virus : it harms the boot sector of the computer. removable media will be spreaded by this virus. i.e. hard discs will be infected.
2.direct action virus : this type of virus directly attacks the computer.
3.resident virus : this type of virus gets installed in computer and it is hard to identify this type of virus.
4.multipartite virus: this virus spreads in multiple ways as the name describes. it infects the boot sector and executable files (.bat , .com)
5.polymorphic virus: it is a type of viru which automatically changes it's code when it passes to a different machine.
6.overwrite virus: this type of virus will destroy the original code by overwriting the code.
7.spacefiller virus: it affects the system by changing the functionality of it. it can rewrite some particular codes.
so why is virus named as vital information under siege:
virus is namede vital information under siege because the vital information is getting seized by the computer.
cant we escape from these viruses:
we can escape these by installing antivirus in our computers such as avg antivirus and quickheal. these will protect your computer by acting as a firewall.