Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Chapter: 0
Q21:
(A+B).(A+C) = ___________
A. B+C
B. A+BC
C. AB+C
D. AC+B
Correct Answer:
B
Chapter: 0
Q22:
A.(B + C) = A.B + A.C is the expression of _________________
A. Demorgan’s Law
B. Commutative Law
C. Distributive Law
D. Associative Law
Correct Answer:
C
Chapter: 0
Q23:
In ANSI/IEEE Standard 754 “Mantissa” is represented by 32-bits___ bits
A. 8-bits
B. 16-bits
C. 32-bits
D. 64-bits
Correct Answer:
C
Chapter: 0
Q24:
Caveman number system is Base 5____ number system
A. 2
B. 5
C. 10
D. 16
Correct Answer:
B
Chapter: 0
Q25:
A SOP expression is equal to 1 ______________
A. All the variables in domain of expression are present
B. At least one variable in domain of expression is present.
C. When one or more product terms in the expression are equal to 0.
D. When one or more product terms in the expression are equal to 1.
Correct Answer:
B
Chapter: 0
Q26:
High level Noise Margins (VNH) of CMOS 5 volt series circuits is _____________
A. 0.3 V
B. 0.5 V
C. 0.9 V
D. 3.3 V
Correct Answer:
C
Chapter: 0
Q27:
If we multiply “723” and “34” by representing them in floating point notation i.e. by first, converting them in floating point representation and then multiplying them, the value of mantissa of result will be ________
A. 24.582
B. 2.4582
C. 24582
D. 0.24582
Correct Answer:
B
Chapter: 0
Q28:
If an active-HIGH S-R latch has a 0 on the S input and a 1 on the R input and then the R input goes to 0, the latch will be ________.
A. SET
B. RESET
C. Clear
D. Invalid
Correct Answer:
A
Chapter: 0
Q29:
3.3 v CMOS series is characterized by __________ and _________ as compared to the 5 v CMOS series.
A. Low switching speeds, high power dissipation
B. Fast switching speeds, high power dissipation
C. Fast switching speeds, very low power dissipation
D. Low switching speeds, very low power dissipation
Correct Answer:
C
Chapter: 0
Q30:
The _______ Encoder is used as a keypad encoder.
A. 2-to-8 encoder
B. 4-to-16 encoder
C. BCD-to-Decimal
D. Decimal-to-BCD Priority
Correct Answer:
B
Chapter: 0
Q31:
How many data select lines are required for selecting eight inputs?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
C
Chapter: 0
Q32:
The diagram above shows the general implementation of ________ form
A. boolean
B. arbitrary
C. POS
D. SOP
Correct Answer:
D
Chapter: 0
Q33:
The Quad Multiplexer has _____ outputs
A. 4
B. 8
C. 12
D. 16
Correct Answer:
A
Chapter: 0
Q34:
Demultiplexer has
A. Single input and single outputs
B. Multiple inputs and multiple outputs
C. Single input and multiple outputs
D. Multiple inputs and single output
Correct Answer:
C
Chapter: 0
Q35:
The expression _________ is an example of Commutative Law for Multiplication.
A. AB+C = A+BC
B. A(B+C) = B(A+C)
C. AB=BA
D. A+B=B+A
Correct Answer:
C
Chapter: 0
Q36:
"Sum-of-Weights" method is used __________
A. to convert from one number system to other
B. to encode data
C. to decode data
D. to convert from serial to parallel data
Correct Answer:
A
Chapter: 0
Q37:
The maximum number that can be represented using unsigned octal system is _______
A. 1
B. 7
C. 9
D. 16
Correct Answer:
B
Chapter: 0
Q38:
If we add “723” and “134” by representing them in floating point notation i.e. by first, converting them in floating point representation and then adding them, the value of exponent of result will be ________
A. zero
B. 1
C. 2
D. 3
Correct Answer:
C
Chapter: 0
Q39:
The range of Excess-8 code is from ______ to ______
A. +7 to -8
B. +8 to -7
C. +9 to -8
D. -9 to +8
Correct Answer:
B
Chapter: 0
Q40:
A non-standard POS is converted into a standard POS by using the rule _____
A. 0 A A =
B. A+B = B+A
C. A = B
D. B A = A
Correct Answer:
A