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Digital Electronics

Digital Electronics
The most suitable gate to check whether the number of 1s in a digital word is even or odd is

 NAND
 X-OR
 AND, OR, and NOT
 NOR

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Digital Electronics
Which of the following shows the correct attachment of even parity bit to the data 00001001?

 000010011
 000001001
 100001001
 000010010

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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?

 AND
 OR
 X-NOR
 X-OR

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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
The devices commonly used for making digital circuits are

 mechanical switches
 relays
 semiconductor devices
 contact switches

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Digital Electronics
What is the Boolean expression for a two-input AND gate ?

 A.B
 A - B
 A + B
 A & B

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