Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Chapter: 0
Q41:
The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?
A. A > B = 1, A < B = 0, A < B = 1
B. A > B = 0, A < B = 1, A = B = 0
C. A > B = 1, A < B = 0, A = B = 0
D. A > B = 0, A < B = 1, A = B = 1
Correct Answer:
C
Chapter: 0
Q42:
The function to be performed by the processor is selected by set of inputs known as ________
A. Function Select Inputs
B. MicroOperation selectors
C. OPCODE Selectors
D. None of given option
Correct Answer:
C
Chapter: 0
Q43:
For a 3-to-8 decoder how many 2-to-4 decoders will be required?
A. 2
B. 1
C. 3
D. 4
Correct Answer:
B
Chapter: 0
Q44:
GAL is an acronym for ________.
A. Giant Array Logic
B. General Array Logic
C. Generic Array Logic
D. Generic Analysis Logic
Correct Answer:
C
Chapter: 0
Q45:
A.(B.C) = (A.B).C is an expression of __________
A. Demorgan’s Law
B. Distributive Law
C. Commutative Law
D. Associative Law
Correct Answer:
D
Chapter: 0
Q46:
2's complement of any binary number can be calculated by
A. adding 1's complement twice
B. adding 1 to 1's complement
C. subtracting 1 from 1's complement
D. calculating 1's complement and inverting Most significant bit
Correct Answer:
B
Chapter: 0
Q47:
The OLMC of the GAL16V8 is _______ to the OLMC of the GAL22V10
A. Similar
B. Different
C. Similar with some enhancements
D. Depends on the type of PALs input size
Correct Answer:
C
Chapter: 0
Q48:
All the ABEL equations must end with ________
A. “ . “ (a dot)
B. “ $ “ (a dollar symbol)
C. “ ; “ (a semicolon)
D. “ endl “ (keyword “endl”)
Correct Answer:
C
Chapter: 0
Q49:
Which one is true:
A. Power consumption of TTL is higher than of CMOS
B. Power consumption of CMOS is higher than of TTL
C. Both TTL and CMOS have same power consumption
D. Power consumption of both CMOS and TTL depends on no. of gates in the circuit.
Correct Answer:
A
Chapter: 0
Q50:
According to Demorgan’s theorem: _________
A. A.B.C
B. A + B + C
C. (A + B) . (A + C)
D. (A.B) . C
Correct Answer:
C
Chapter: 0
Q51:
The AND Gate performs a logical __________ function
A. Addition
B. Subtraction
C. Multiplication
D. Division
Correct Answer:
C
Chapter: 0
Q52:
NOR gate is formed by connecting _________
A. OR Gate and then NOT Gate
B. NOT Gate and then OR Gate
C. AND Gate and then OR Gate
D. OR Gate and then AND Gate
Correct Answer:
A
Chapter: 0
Q53:
When the control line in a tri-state buffer is high, the buffer operates like a ________ gate
A. AND
B. OR
C. NOT
D. XOR
Correct Answer:
C
Chapter: 0
Q54:
The GAL22V10 has ____ inputs
A. 22
B. 10
C. 44
D. 20
Correct Answer:
B
Chapter: 0
Q55:
The ABEL symbol for “OR” operation is
A. !
B. &
C. #
D. $
Correct Answer:
C
Chapter: 0
Q56:
The function to be performed by the processor is selected by a set of inputs known as ________
A. Function Select Inputs
B. MicroOperation selectors
C. OPCODE Selectors
D. None of given option
Correct Answer:
A
Chapter: 1
Q57:
The binary value “1010110” is equivalent to decimal __________
A. 86
B. 87
C. 88
D. 89
Correct Answer:
B
Chapter: 1
Q58:
Tri-State Buffer is basically a/an _________ gate.
A. AND
B. OR
C. NOT
D. XOR
Correct Answer:
C
Chapter: 1
Q59:
Caveman number system is Base ______ number system
A. 2
B. 5
C. 10
D. 16
Correct Answer:
B
Chapter: 1
Q60:
The basic building block for a logical circuit is _______
A. A Flip-Flop
B. A Logical Gate
C. An Adder
D. None of given options
Correct Answer:
B