A logic gate has four inputs. Its possible input combinations will be:

Correct answer: B. 16

  • A. 4
  • B. 16
  • C. 32
  • D. 64

Explanation

This can be calculated using the formula 2n, where n is the number of possible inputs. The number of inputs is 4. Each input will take 0 OR 1 as values Therefore 24 = 16 possible combinations of inputs are there as

This question appeared on the NUMS 2015 paper, which you can sit online with every answer explained.

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About PN Junction

A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.

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