NIELIT 2017 July Scientist B (CS) - Section B: 17

Question

The digital multiplexer is basically a combination logic circuit to perform the operation

• A. AND-AND
• B. OR-OR
• C. AND-OR
• D. OR-AND

Answer 1

Mux is basically a data selector, which internally uses AND OR logic. Below is a 1 x 4 mux. $S_{1}$ and $S_{0}$ are select lines. $I_{0-3}$ are input 

 

So C is correct.

Image Source: https://www.tutorialspoint.com/digital_circuits/digital_circuits_multiplexers.htm

Answer 2

implementation of 4x1 multiplexer...

Option C is right