Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q301: What is the canonical form of the Boolean expression A.B + B.C?
- A: (A.B.C) + (A.B.C)
- B: A.B.C + A.B.C
- C: A + B + C
- D: A.B.C + A.B.C
View Answer
D
Q302: How is a non-standard SOP expression converted into a standard SOP form?
- A: Using Karnaugh maps
- B: Applying Boolean laws
- C: Using truth tables
- D: By adding missing variables
View Answer
B
Q303: Which Boolean law is applied to simplify A + A.B?
- A: Distributive Law
- B: Complement Law
- C: Absorption Law
- D: Demorgan's Theorem
View Answer
C
Q304: In the expression (A + B + C), what is the value of F when A=0, B=1, C=1?
- A: zero
- B: 1
- C: Undefined
- D: 0.5
View Answer
B
Q305: How do you represent the Boolean expression F = (A + B + C) in a truth table?
- A: By marking outputs as 1 for each sum term
- B: By marking outputs as 0 for each product term
- C: By using Karnaugh maps
- D: By applying Demorgan’s theorem
View Answer
A
Q306: What is the result of the Boolean expression (A + B + C)(A + B + D) when A=0, B=1, C=0, D=1?
- A: zero
- B: 1
- C: Undefined
- D: 0.5
View Answer
A
Q307: What is the purpose of converting a Boolean expression to its canonical form?
- A: To simplify the expression
- B: To create a function table
- C: To implement the logic circuit
- D: To verify correctness
View Answer
C
Q308: What does a Karnaugh Map help to simplify in Boolean algebra?
- A: Logic gates
- B: Boolean expressions
- C: Arithmetic operations
- D: Digital circuits
View Answer
B
Q309: How many cells are there in a 3-variable Karnaugh Map?
- A: 4
- B: 8
- C: 16
- D: 32
View Answer
B
Q310: In the column-based 3-variable Karnaugh Map, what do the binary values 00, 01, 11, and 10 represent?
- A: Values of variable C
- B: Values of variable A and B
- C: Values of variable B and C
- D: Values of variable A, B, and C
View Answer
B