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

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VSSC (ISRO) Technician B (Electronic Mechanic) Previous Year Paper (Held on 25 Sept 2016)
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  1. XOR
  2. NAND
  3. NOR
  4. AND

Answer (Detailed Solution Below)

Option 1 : XOR
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Detailed Solution

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Concept:

The most suitable gate to check whether the number of 1’s in a digit word is even or odd is an XOR gate.

Explanation:

The truth table of an XOR gate is as shown:

A

B

XOR (O/P)

0

0

0

0

1

1

1

0

1

1

1

0

 

If the number of 1’s is even, the output of the XOR gate = 0.

If the number of 1’s is odd, the output of the XOR gate = 1.

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