In a priority queue, items waiting in the queue the longest are always popped next.

An algorithm is

a. The inputs and outputs of a program b. The part of the computer that does the processing c. A finite set of steps to solve a problem d. A complete computer program

A __________ interface displays a prompt to allow the user to type a command which is then executed.

a. graphical menu b. graphical user c. command line d. command prompt