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Digital Electronics

Digital Electronics
A half adder is a ________ circuit.

 Sequential
 None
 Both A and B
 Combinational

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Digital Electronics
(11011) 2 in BCD 8421 code is

 00011011
 01101100
 11011001
 00100111

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Digital Electronics
Consider the following multiplication: (10w1z) × (15)10 = (y01011001)2 Which one of the following gives appropriate values of w,y and z?

 w = 1,y = 1,z = 1
 w = 0,y = 1,z = 1
 w = 0,y = 0,z = 1
 w = 1,y = 1,z = 0

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Digital Electronics
What is the difference between xor gate and exor gate.

 xor gives two outputs while exor gives one
 xor gives one output while exor gives two
 xor and exor are complement of each other
 both are same

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Digital Electronics
The fast logic family is

  ECL.
  DRL.
  TTL.
  TRL.

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Digital Electronics
In signed magnitude representation, the binary equivalent of 22.5625 is (the bit before comma represents the sign)

 0,10110.1011
 1,10101.1001
 0,10110.1001
 1,10110.1001

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