Question

What are the different method by which virus can infect other  programs ?

Answer 1

Infection Methods:
(a) Append: In this method viral code appends itself to the unaffected program.
(b) Replace: In this method viral code replaces original executable program completely or partially.
(c) Insert: In this method the viral code is inserted in the body of an executable code to carry out some funny actions.
(d) Delete: In this case viral code deletes some codes from executable program.
(e) Redirect: In this case the normal control flow of a program is changed to execute some other code.