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Digital Electronics

Digital Electronics
Which of the following is 1’s complement representation of +57

 01000110
 00111001
 00000001
 11000110

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Digital Electronics
A gate is inhibited when its inhibit input is at logic 1. The gate is

 AND
 none of these
 OR
 NAND

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Digital Electronics
Complement of XNOR and NOR is ________ and ________ respectively.

 OR, NOR
 XOR, NOR
 NOR, XNOR
 XOR, OR

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to negative logic system.

 5 V and 0 V
 1 V and 5 V
 –1.5 V and – 0.5 V
 0 V and 5 V

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Digital Electronics
When will be the output of an exclusive-OR gate is HIGH ?

 The inputs are different
 All inputs are HIGH
 All inputs are LOW
 The inputs are equal

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Digital Electronics
A half adder has

 2 inputs and 1 outputs
 2 inputs and 2 output
 1 input and 2 outputs
 1 input and 1 output

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