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Digital Electronics

Digital Electronics
Which one of the following is 2’s complement of -68?

 11000100
 01111100
 10111100
 00111100

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Digital Electronics
The complement of a function A is

 0
 1
 A
 Ā

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Digital Electronics
An 8 × 4 ROM contains a decoder of size

 8 × 8
 3 × 8
 8 × 4
 3 × 4

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Digital Electronics
In LSI, the number of gate circuits per chip is

 100 to 9,999
 1000 to 10,000
 < 10,000
 100 to 999

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

 AND
 OR
 none of these
 NAND

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Digital Electronics
Which of the following is a digital device

 Light switch
 Regulator of a fan
 Resistance of a material
 Microphone

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