Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Chapter: 10
Q321:
How does grouping of don’t care conditions affect the final expression in Karnaugh Map?
A. It does not affect the final expression
B. It always makes the expression more complex
C. It can simplify the final expression
D. It is not necessary to consider don’t cares
Correct Answer:
C
Chapter: 10
Q322:
What is the first step in simplifying a Boolean expression using a Karnaugh Map?
A. Grouping cells
B. Mapping the expression
C. Determining the minterms
D. Filling in the K-map
Correct Answer:
B
Chapter: 10
Q323:
When simplifying a Boolean expression with a 4-variable Karnaugh Map, what does a group of 16 cells yield?
A. Value of 0
B. Value of 1
C. Product term of 1 variable
D. Product term of 2 variables
Correct Answer:
B
Chapter: 11
Q324:
What is placed in the cells corresponding to maxterms in a K-Map for a Standard POS expression?
A. 1
B. zero
C. Both 0 and 1
D. None of the above
Correct Answer:
B
Chapter: 11
Q325:
How many cells are filled with 0s in the K-Map for the expression (A + B + C).(A + B + C).(A + B + C).(A + B + C) when the maxterms are 1, 2, 5, and 7?
A. 2
B. 3
C. 4
D. 5
Correct Answer:
C
Chapter: 11
Q326:
What does a group of 1 cell represent in a 3-variable K-map?
A. A sum term of one variable
B. A sum term of two variables
C. A sum term of three variables
D. A group of 8 cells yielding 0
Correct Answer:
A
Chapter: 11
Q327:
What does a group of 4 cells represent in a 4-variable K-map?
A. A sum term of one variable
B. A sum term of two variables
C. A sum term of three variables
D. A sum term of four variables
Correct Answer:
D
Chapter: 11
Q328:
In the K-map simplification of a POS expression, how is a group of 0s used?
A. They are grouped to form product terms
B. They are grouped to form sum terms
C. They are ignored
D. They are replaced with 1s
Correct Answer:
B
Chapter: 11
Q329:
For a 3-variable K-map, how many cells yield a value of 0 for the expression if all maxterms are filled?
A. 2
B. 4
C. 6
D. 8
Correct Answer:
D
Chapter: 11
Q330:
In the K-map for a POS expression, how many groups are formed if there are 8 maxterms?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
C
Chapter: 11
Q331:
In a 4-variable K-map, how many variables does a group of 2 cells represent?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
B
Chapter: 11
Q332:
What is the simplified POS expression for the maxterms 0 and 4 using a 3-variable K-map?
A. (A + B + C)
B. (A + C)
C. (B + C)
D. (A + B)
Correct Answer:
B
Chapter: 11
Q333:
For a 5-variable Karnaugh map, how many groups of 16 cells can be formed?
A. 1
B. 2
C. 4
D. 8
Correct Answer:
B
Chapter: 11
Q334:
In a 5-variable K-map, what is the term for a group of 4 cells that spans two 4-variable maps?
A. BDE
B. ABCDE
C. BCD
D. ABE
Correct Answer:
A
Chapter: 11
Q335:
For a BCD to 7-Segment Decoder, how many different segments are controlled by the circuit?
A. 5
B. 6
C. 7
D. 8
Correct Answer:
C
Chapter: 11
Q336:
What does the 4-bit BCD input to a 7-Segment Decoder determine?
A. The decimal number to be displayed
B. The binary number to be displayed
C. The hex number to be displayed
D. The output power level
Correct Answer:
A
Chapter: 11
Q337:
How many function tables are required for a 7-Segment Display with a 4-bit input?
A. 4
B. 5
C. 6
D. 7
Correct Answer:
D
Chapter: 12
Q338:
What does a comparator circuit do?
A. Compares two numbers and outputs a signal
B. Adds two numbers and outputs the sum
C. Subtracts two numbers and outputs the difference
D. Multiplies two numbers and outputs the product
Correct Answer:
A
Chapter: 12
Q339:
Which of the following input combinations will set the output A>B to 1 for a 2-bit comparator?
A. 00 01
B. 01 10
C. 10 00
D. 01 11
Correct Answer:
C
Chapter: 12
Q340:
How many outputs does a 2-bit comparator circuit have?
A. 2
B. 3
C. 4
D. 5
Correct Answer:
B