Question

State any four methods by which a virus can affect other programs.

Answer 1

Following are the four methods by which a virus can infect other programs:

1. Append: In this method, the virus code attaches itself to programs that were previously uninfected.
2. Replace: In this method, the virus code partially or completely substitutes the original executable program to perform unwanted actions.
3. Insert: Here, the virus code is embedded within the executable program to carry out undesirable or harmful operations.
4. Delete: In this case, the virus code removes certain portions of the executable program.