Download Aptitude Crack
img not found img not found

Combinational Logic Analysis

Q1: A 4-variable AND-OR circuit produces a 0 at its Y output. Which combination of inputs is correct?

A A = 0, B = 0, C = 1, D = 1

B A = 1, B = 1, C = 0, D = 0

C A = 1, B = 1, C = 1, D = 1

D A = 1, B = 0, C = 1, D = 0

ANS:D - A = 1, B = 0, C = 1, D = 0

A AND with B.
C AND with D.
Output of first AND gate AB is OR with output of second AND gate is CD.

So, output of OR gate is,
Y= AB+CD.

So, A=1, B=0, C=1, D=0.
AB=0, CD=0.

So Output Y=0.
Option D is the write Answer.



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.