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26. The following are basic types of record access methods
sequential and random
direct and immediate
sequential and indexed
on-line and real-time
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27. Auxiliary storage is
Secondary storage
Primary storage
Processing device
None of these
28. A method of using a communication channel in which signals can be transmitted between a source and a destination in both directions simultaneously is called
Full Duplex
Half-duplex
Quarter duplex
29. A data transmission medium made of tiny threads of glass or plastic that can transmit huge amount of information at the speed of light is
Fiber optic cable
Copper cable
Twisted wire cable
30. A semiconductor memory which allows the eraser of the information stored in it so that new information can be stored in it is referred as
EPROM
ROM
RAM
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