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Digital Electronics

Digital Electronics
The output of a gate is LOW when at least one of its inputs is HIGH. This is true for

 OR
 NOR
 AND
 NAND

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Digital Electronics
An OR gate has 6 inputs. The number of input words in its truth table are

64
128
32
6

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Digital Electronics
The maximum positive and negative numbers which can be represented in two’s complement form using n bits are respectively,

 +2n-1,-2n-1
 +2n-1,-(2n-1+1)
 +(2n-1-1),-2n-1
 +(2n-1-1),-(2n-1-1)

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Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 cyclic code
 binary code
 2421 code
 8421 code

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Digital Electronics
A digital circuit that can store on bit is a

 gate
 XOR gate
 registor
 flip-flop

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Digital Electronics
How many NOR gates are required to obtain AND operation?

 3
 2
 4
 1

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