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Digital Electronics

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

 10111100
 11000100
 01111100
 00111100

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Digital Electronics
In an SR latch built from NOR gates, which condition is not allowed

 S=0, R=1
 S=1, R=0
 S=1, R=1
 S=0, R=0

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Digital Electronics
AND operation of (79)10 & (-56)10 is

 48H
 50H
 08H
 42H

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Digital Electronics
Which of the following gates cannot be used as an inverter?

 NOR
 AND
 X-NOR
 NAND

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

 8 × 4
 3 × 8
 3 × 4
 8 × 8

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Digital Electronics
1’s complement of 17 is

 10111.
 10001.
  01110.
 11100.

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