SLC computer Comptuer virus

1. Computer virus is a computer program that can copy itself and infect a computer  without permission or knowledge of user.
2. A boot sector virus is one that infects the first sector, i.e. the boot sector, of a floppy disk or hard drive.
3. Macro virus is a type of computer virus that is encoded as a macro embedded in a document.
4. Polymorphic virus is a type of virus that changes its virus signature(i.e., its binary pattern) every time it replicates and infects a new file in order to keep from being detected by an antivirus program.
5. Stealth virus is a file virus that uses special techniques to hide its presence from users and virus scanners?
6. Antivirus program is a program designed to detect and remove viruses from the computer system?