Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Chapter: 7
Q261:
What is the propagation delay time for a TTL gate changing from high to low?
A. 3 ns
B. 9 ns
C. 10 ns
D. 15 ns
Correct Answer:
B
Chapter: 7
Q262:
What is the maximum number of inputs that can be connected to a TTL gate's output in its series?
A. 10
B. 20
C. 40
D. 50
Correct Answer:
B
Chapter: 7
Q263:
What is the unit load for a TTL gate?
A. 10 μA
B. 100 μA
C. 1 mA
D. 10 mA
Correct Answer:
A
Chapter: 7
Q264:
What is the fan-out of a CMOS gate dependent on?
A. Frequency of operation
B. Power dissipation
C. Propagation delay
D. Voltage levels
Correct Answer:
A
Chapter: 7
Q265:
What is the speed-power product (SPP) a measure of?
A. Performance of a logic circuit
B. Propagation delay
C. Power dissipation
D. Noise margin
Correct Answer:
A
Chapter: 7
Q266:
What is the maximum clock rate for a 74HC series CMOS gate?
A. 50 MHz
B. 100 MHz
C. 150 MHz
D. 170 MHz
Correct Answer:
D
Chapter: 7
Q267:
What is the typical static power dissipation for a 74LV CMOS gate?
A. 0.0016 mW
B. 0.0055 mW
C. 0.0008 mW
D. 0.00275 mW
Correct Answer:
A
Chapter: 8
Q268:
What is the Boolean expression for an AND gate?
A. A + B
B. A.B
C. A + B + C
D. A.B.C
Correct Answer:
B
Chapter: 8
Q269:
Which of the following is the complement of the Boolean variable X?
A. X
B. X
C. X
D. X
Correct Answer:
A
Chapter: 8
Q270:
What does a sum term in Boolean algebra represent?
A. The product of literals
B. The sum of literals
C. The difference of literals
D. The negation of literals
Correct Answer:
B
Chapter: 8
Q271:
What is the result of the Boolean operation A.B + A.B.C?
A. A.B
B. A.B + A.C
C. A.B + C
D. A.B.C
Correct Answer:
A
Chapter: 8
Q272:
According to the Commutative Law, what is the result of A + B?
A. A + B
B. B + A
C. A.B
D. A.B.C
Correct Answer:
B
Chapter: 8
Q273:
What does the Associative Law state for Boolean Addition?
A. A + (B + C) = (A + B) + C
B. A + (B.C) = (A + B)C
C. A.B + B.C = (A + B).C
D. A.B + C = A + B.C
Correct Answer:
A
Chapter: 8
Q274:
What is the result of applying the Distributive Law A.(B + C)?
A. A.B + A.C
B. A + B.C
C. A.B + C
D. A.B.C
Correct Answer:
A
Chapter: 8
Q275:
(A + B)(A + B + C)(A + C) is an example of ______________
A. Product of sum form
B. Sum of product form
C. Demorgans law
D. Associative law
Correct Answer:
A
Chapter: 8
Q276:
What does the rule A + A = A in Boolean Algebra signify?
A. Idempotent Law
B. Complement Law
C. Distributive Law
D. Associative Law
Correct Answer:
A
Chapter: 8
Q277:
What is the complement of the Boolean expression A.B?
A. A + B
B. A.B
C. A + B
D. A.B
Correct Answer:
A
Chapter: 8
Q278:
What is the result of the Boolean operation (A + B) (A + C)?
A. A + B.C
B. A.B + A.C
C. A + B.C
D. A + B.C + A.C
Correct Answer:
A
Chapter: 8
Q279:
Which law states that A.(B.C) = (A.B).C?
A. Commutative Law
B. Associative Law
C. Distributive Law
D. DeMorgan’s Theorem
Correct Answer:
B
Chapter: 8
Q280:
What is the result of A + A.B in Boolean Algebra?
A. A + B
B. A.B
C. A
D. A.B + A.C
Correct Answer:
A