COMPUTER FUNDAMENTALS

Detailed explanation-1: -A virus is a type of malware that, when executed, self-replicates by modifying other computer programs and inserting their own code. When this replication succeeds, the affected areas are then said to be infected. Virus writers use social engineering and exploit vulnerabilities to infect systems and spread the virus.

Detailed explanation-2: -A virus is a computer program that replicates itself by modifying system or application software and then traveling from computer to computer, via disks or a network. Most viruses are harmless, but some viruses can erase files on your hard drive, slow down your computer, or do other kinds of damage.

Detailed explanation-3: -A computer virus is a malware program that, when executed, replicates by inserting copies of itself (possibly modified) into other computer programs, data files, or the boot sector of the hard drive; when this replication succeeds, the affected areas are then said to be “infected".

Detailed explanation-4: -A computer virus is malicious code that replicates by copying itself to another program, computer boot sector or document and changes how a computer works.

Detailed explanation-5: -A worm is a standalone program that replicates itself to infect other computers without requiring action from anyone. Since they can spread fast, worms are often used to execute a payload-a piece of code created to damage a system.