________ is a program that performs desired task but also executes some unexpected task.

Keep practicing — related questions

• A........ . is a self-contained program that makes complete copies of itself.
• ______________ is a self replicating program that is self contained and does not require a host program.
• __________ is a software agent that acts on behalf of a user.
• Virus combined with a useful software is called as____________
• Which of the following replicates itself by attaching to other programs?
• A computer virus is ____.
• ____ program may be written to steal user passwords.
• _______ is a set of computer programs used in a computer to perform tasks.