GATE Bits 47 48 Combinational Circuits || Lesson 111.3 || Digital Electronics || Learning Monkey ||

Here we will try to understand GATE Bits 47 48 Combinational Circuits.

The Boolean expression for the output ‘f’ of the multiplexer shown below is

(A) (P(XOR)Q(XOR)R)’
(B) P(XOR)Q(XOR)R
(C) (P+Q+R)’
(D) P+Q+R

GATE 2010

Consider the following combinational function block involving four Boolean variables x, y, a, b where x, a, b are inputs and y is the output.

f (x, y, a, b)
{
if (x is 1) y = a;
else y = b;
}

Which one of the following digital logic blocks is the most suitable for implementing this function?
(A) Full adder
(B) Priority encoder
(C) Multiplexer
(D) Flip-flop

GATE 2014

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