Digital Electronics Lab

1. Logic Gates are the building blocks of all circuits in a computer.

• a) True

• b) False

• C)None of these

2) A __________ gate gives the output as 1 only if all the inputs signals are 1.

• a) AND

• b) OR

• c) EXOR

• d) NOR

3) The boolean expression of an OR gate is _______

• a) A.B

• b) A’B+AB’

• c) A+B

• d) A’B’

4) Which of the following gate will give a 0 when both of its inputs are 1?

• a) AND

• b) OR

• c) NAND

• d) EXOR

5) The Boolean expression for a 3-input AND gate is ________.

• A )X = AB

• B) X = ABC

• C) X = A + B + C

• D) X = AB + C

6) Which among the below stated boolean expressions do not obey De-Morgan's theorem ?

• a) X+Y = X . Y

• b) X.Y = X + Y

• c) X.Y = X.Y

• d) None of the above

7. The number of min terms for an expression comprising of 3 variables?

• a) 8

• b) 3

• c) 0

• d) 1

8. The logical sum of two or more logical product terms is called __________

• a) SOP

• b) POS

• c) OR operation

• d) NAND operation

9. The expression Y=(A+B)(B+C)(C+A) shows the _________ operation.

• a) AND

• b) POS

• c) SOP

• d) NAND

10. A Karnaugh map (K-map) is an abstract form of ____________ diagram organized as a matrix of squares.

• a) Venn Diagram

• b) Cycle Diagram

• c) Block diagram

• d) Triangular Diagram