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21 . The ..... program compresses large files into a smaller file
A. WinZip B. WinShrink
C. WinStyle D. None of above

22 . Which of the following is an example of a real time operating System?
A. Process Control B. Windows XP
C. MS DOS D. Lynx

23 . What does AM mean?
A. Anno median B. Amplitude modulation
C. Angelo marconi D. Amperes

24 . Voltage is sometimes referred to as EMF, or Electromotive...?
A. Factor B.
C. Force D.

25 . Which of the following operating system does not implement the multitasking truly?
A. MS DOS B. Windows XP
C. Windows NT D. Windows 98