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Digital Electronics

Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 1 and 3
 1 and 4
 0 and 3
 0 and 4

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

 50H
 48H
 08H
 42H

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Digital Electronics
If clock time period is 1ms, what is its frequency

None of these
 1 kHz
 1 MHz
 1 mHz

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Digital Electronics
Which of the following is known as a mod-2 adder?

 NOR gate
 X-OR gate
 X-NOR gate
 NAND gate

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Digital Electronics
A gate is enabled when its enable input is at logic 0. The gate is

 NAND
 NOR
 AND
 none of these

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Digital Electronics
X + X.Y = ?

 1
 0
 Y
 X

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