91.
There are historical evidences to prove that abacus was first used in

92.
A class of random access memory that requires periodic servicing in order for the contents to remain valid is

93.
Computer can not do anything without a

94.
The ability of a computer system to remain operational despite various failures is

95.
Which of the following memories must be refreshed many times per second?

96.
The third generation of computers covers the period:

97.
An electronic logic gate whose output is logic 0 only when all inputs are logic 1 is

98.
Which of the following is the expansion of EBCDIC

99.
A vertically aligned set of tracks on a disk pack is known as

100.
Which is an electronic device that can store temporarily a single bit of data.