57. All memory units are expressed as powers of ?
A.2
B.5
C.10
D.20
58. What is meaning of OMR ?
A.Optical Mark Reader
B.Optical Message Reader
C.Optical Message Render
D.Optical Mark Render
59. What can be considered as basic building blocks of a digital circuit ?
A.Logic Gate
B.Diode
C.Semi Conductor
D.CMOS
60. Which type of software are device drivers
A.Application software
B.System software
C.Utility software
D.These are type of hardware
61. Which function key is used to check spellings ?
A.F2
B.F5
C.F7
D.F11
62. Which of following allows two or more users to work on same time ?
A.Multiprocessing
B.Multithreading
C.Multiprocessing
D.Multi-capable
63. Which of following is not a valid bus in computer system ?
A.Data Bus
B.Memory Bus
C.Address Bus
D.System Bus
Page 9 of 15