21. Which type of system puts the user into direct conversation with the computer through a keyboard?

A. Real time processing
B. Interactive computer
C. Batch processing
D. Time sharing
E. None of the above

22. The term referring to evacuating the content of some part of the machine is known as

A. Dump
B. Enhancement
C. Down
D. Compiler
E. None of the above

23. A single packet on a data link is known as

A. Path
B. Frame
C. Block
D. Group
E. None of the above

24. The process of communicating with a file from a terminal is

A. Interactive
B. Interrogation
C. Heuristic
D. All of the above
E. None of the above

25. A common boundary between two systems is called

A. Interdiction
B. Interface
C. Surface
D. None of the above