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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
What is the radix of octal number system ?

 2
 16
 10
 8

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Digital Electronics
The momentary change in the output/state of the flip-flops is known as

 trigger
 tri-state
 unstable state
 inverter

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Digital Electronics
What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively?

 X-OR
 X-NOR
 AND
 OR

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Digital Electronics
Minimization of logical expressions while designing digital systems helps in reducing

 space requirements
 power requirements
All of these
 cost

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Digital Electronics
Maximum number in decimal that can be represented by 4 bits (binary) is

 7
 16
 4
 15

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