COMPUTER FUNDAMENTALS

Detailed explanation-1: -Typically, computer viruses spread through malicious online downloads, infected email attachments, or by plugging in infected hardware like an external flash drive (USB stick). Computer viruses can spread through almost any method of file sharing, as long as the virus can avoid detection by antivirus programs.

Detailed explanation-2: -Program or file viruses are software programs that attach themselves to executable programs. Once the infected program is run, the virus is transferred to your system’s memory and may replicate itself further. It may spread to all the files on a hard drive or to files of a specific type.

Detailed explanation-3: -It can infect multiple parts of a system including memory, files, and boot sector which makes it difficult to contain.

Detailed explanation-4: -A computer virus is a kind of malicious computer program, which when executed, replicates itself and inserts its own code. When the replication is done, this code infects the other files and program present on your system.

Detailed explanation-5: -How viruses travel through the body. Once a virus gets into a host’s body, it travels along the surfaces of cells until its proteins begin to bind with receptors on the cells. The virus and the cells then fuse, allowing the DNA or RNA inside the virus to enter the cells, where it begins to reproduce.