ISRO Computer Science (CSE) 2008 - Question 22

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How many 2-input multiplexers are required to construct a 2^10-input multiplexer?

  • A. 1023
  • B. 31
  • C. 10
  • D. 127

Answer: A. 1023

Explanation: To build an N-input MUX using 2-input MUXes, we need N-1 MUXes. 2^10 - 1 = 1024 - 1 = 1023.

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