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Digital Electronics

Digital Electronics
To add two m-bit numbers, the required number of half adder is

 2m
 2m+1
 2m-1
 2m-1

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Digital Electronics
A multiplexer is a

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

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Digital Electronics
The NAND gate can function as a NOT gate if

 inputs are left open
 one input is set to 1
 all inputs are connected together
 one input is set to 0

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Digital Electronics
If J = K (J and K are shorted) in a JK flip-flop, what circuit is made

 Shorted JK flip-flop
 K flip-flop
 SR flip-flop
 T flip-flop

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Digital Electronics
Which of the following operations is commutative but not associative?

 X-OR
 NAND
 OR
 AND

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Digital Electronics
The output of a gate is LOW if and only if all its inputs are HIGH. It is true for

 NOR
 AND
 NAND
 X-NOR

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