GATE | GATE CS 2010 | Question 65

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

CSE_201009
(A) (P(XOR)Q(XOR)R)’
(B) P(XOR)Q(XOR)R
(C) (P+Q+R)’
(D) P+Q+R


Answer: (B)

Explanation: For 4 to 1 mux truth table

SEL                  INPUT                 O/P

Q P R R’ R’ R F
0 0 X X X 1 1
0 1 X X 1 X 1
1 0 X 1 X X 1
1 1 1 X X X 1

p’q’r+p’qr’+pq’r’+pqr

pXORqXORr

Quiz of this Question



My Personal Notes arrow_drop_up

Recommended Posts:



0 Average Difficulty : 0/5.0
No votes yet.






User Actions