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Digital Electronics

Digital Electronics
It is desired to have a 64 × 8 ROM. The ROMs available are of 16 × 4 size. The number of ROMs required will be

 2
 4
 6
 8

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Digital Electronics
Which of the following gates is known as a coincidence detector?

 X-OR gate
 NAND gate
 AND gate
 X-NOR gate

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Digital Electronics
A multiplexer is a

 1-to-1 device
 N-to-N device
 N-to-1 device
 1-to-N device

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Digital Electronics
The base of the number system for the addition operation 24 + 14 = 41 to be true is

 5
 6
 8
 7

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Digital Electronics
To get an excess-3 code from BCD code

 0110 is added
 0011 is added
 0011 is subtracted
 0110 is subtracted

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Digital Electronics
The output of a NAND gate is low

 only when at least one input is high
 only when at least one input is low
 only when all the inputs are high
 only when all the inputs are low

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