Multiple choice

Without any additional circuitry, an 8 : 1 MUX can be used to obtain

  1. some but not all Boolean functions of 3 variables

  2. all function of 3 variables but none of 4 variables

  3. all functions of 3 variables and some but not all of 4 variables

  4. all functions of 4 variables
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A $2^n.1$ MUX can implement all logic functions of (n+1) variable without and y additional circuitry. Here n = 3. Thus a 8:1 MUX can implement all logic functions of 4 variable.

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