1. The main criterion in the design of a digital circuit is reduction of ?

cost

size

weight

volume

Answer: size

Explanation:


2. The binary number designations of the rows and columns of the K-map are in ?

binary code

BCD code

Gray code

XS-3 code

Answer: Gray code

Explanation:


3. An 8-square eliminates ?

2 variables

3 variables

4 variables

8 variables

Answer: 3 variables

Explanation:

A group of 8 cells is called an octet, it will eliminate 3 variables in a given expression. (2POWER 3 = 8)


4. The simplified logic expression for y= A’B+ AB’+ AB is ?

AB

(A + B )’

A+B

A’+B’

Answer: A+B

Explanation:


5. If A and B are Boolean variables, then what is (A + B). (A + B’) equal to ?

B

A

A + B

AB

Answer: A

Explanation:


6. Which of the following Boolean algebra rules is correct ?

A. A’ = 1

A+ AB= A + B

A+ A’B = A + B

A(A + B)= B

Answer: A+ A’B = A + B

Explanation:


7. If the Boolean expression P’Q+QR+ PR is minimized, the expression becomes ?

P’Q+QR

P’Q+ PR

QR+ PR

PQ+QR+ PR

Answer: P’Q+ PR

Explanation:


8. What is the simplified form of the Boolean expression T= (X+Y)(X+Y’)(X’+Y) ?

X’Y’

X’Y

XY

XY’

Answer: XY

Explanation:


9. The Boolean expression X’YZ’+X’Y’Z XYZ’ + XY’Z+XYZ can be simplified to ?

XZ’+X’Z+YZ

XZ+Y’Z+YZ’

X’Y + YZ+XZ

(XY)’+YZ’+X’Z

Answer: XZ+Y’Z+YZ’

Explanation:


10. The reduced form of the Boolean expression A[B+C(AB+ AC’)] is ?

AB

AB’

AB

AB+ BC’

Answer: AB

Explanation: