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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 4
 0 and 3

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Digital Electronics
Which of the following logic circuits is the fastest ?

 TTL.
 RTL.
 DTL.
 All have same speed.

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Digital Electronics
Odd parity of a bit stream can be tested using ________ gate.

 NOR
 OR
 AND
 XOR

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Digital Electronics
A three-state buffer has the following output states

 Both A and B
 Set, Reset, Halt
 1, 0, float
 High, Low, Float

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Digital Electronics
The main equation for a D flip flop is

 Q=D
 Q=0
 Q=D'
 Q=1

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 OR
 NOT
 NAND
 AND

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