When using an insertion sort, each list element is examined one at a time and moved down if the tested element should be inserted before them.

Which of the following is not computer software?

A. a USB memory stick B. the operating system C. a C++ compiler D. a spreadsheet

What type of malicious program cannot stand on its own and can replicate itself through an executable program attached to an e-mail?

A. shell B. virus C. keylogger D. rootkit