IncludeHelp_logo
Skip Navigation Links
×

Multiple-Choice Questions

Web Technologies MCQs

Computer Science Subjects MCQs

Databases MCQs

Programming MCQs

Testing Software MCQs

Digital Marketing Subjects MCQs

Cloud Computing Softwares MCQs

AI/ML Subjects MCQs

Engineering Subjects MCQs

Office Related Programs MCQs

Management MCQs

More

Home » MCQs

Digital Circuits Multiple-Choice Questions (MCQs)

Digital circuits is a field of electronics involving the study of digital signals and the engineering of devices that use or produce them.

Digital Circuits MCQs: This section contains multiple-choice questions and answers on the various topics of Digital Circuits. Practice these MCQs to test and enhance your skills on Digital Circuits.

List of Digital Circuits MCQs

1. What is the base of the decimal number system?

  1. 2
  2. 8
  3. 10
  4. 16

Answer: C) 10

Explanation:

The base of the decimal number system is 10.

Discuss this Question

2. What is the range of the decimal number system?

  1. 1-10
  2. 0-10
  3. 0-9

Answer: C) 0-9

Explanation:

The range of the decimal number system is 10.

Discuss this Question

3. Integer part is the part that lies to the ____ of the decimal point in the Decimal number system.

  1. Right
  2. Left

Answer: B) Left

Explanation:

The integer part is the part that lies to the left of the decimal point in the Decimal number system.

Discuss this Question

4. The ____ component is the part of the number to the right of the decimal point.

  1. Fractional
  2. Integer

Answer: A) Fractional

Explanation:

The Fractional component is the part of the number to the right of the decimal point.

Discuss this Question

5. What of the following is the correct representation of a decimal number system?

  1. 192.146 = (1 × 102) + (9 × 101) + (2 × 100) + (1 × 10-1) + (4 × 10-2) + (6 × 10-3)
  2. 192.146 = (1 × 103) + (9 × 102) + (2 × 101) + (1 × 10-1) + (4 × 10-2) + (6 × 10-3)
  3. 192.146 = (1 × 101) + (9 × 102) + (2 × 103) + (1 × 10-1) + (4 × 10-2) + (6 × 10-3)
  4. None

Answer: A) 192.146 = (1 × 102) + (9 × 101) + (2 × 100) + (1 × 10-1) + (4 × 10-2) + (6 × 10-3)

Explanation:

192.146 = (1 × 102) + (9 × 101) + (2 × 100) + (1 × 10-1) + (4 × 10-2) + (6 × 10-3) is the correct answer.

Discuss this Question

6. What is the base number of the binary number system?

  1. 2
  2. 4
  3. 6
  4. 8

Answer: A) 2

Explanation:

The base of the binary number system is 2.

Discuss this Question

7. What is the range of numbers used in a binary number system?

  1. 0-2
  2. 0-1
  3. 1-2
  4. None

Answer: B) 0-1

Explanation:

O and 1 numbers are used in the binary number system.

Discuss this Question

8. What is the base of the Octal number system?

  1. 2
  2. 4
  3. 8
  4. 16
  5. 10

Answer: C) 8

Explanation:

The base of the Octal number system is 8.

Discuss this Question

9. What range of numbers are used in the octal number system?

  1. 0-8
  2. 1-9
  3. 0-9
  4. 0-7

Answer: D) 0-7

Explanation:

From 0 to 7 numbers are used in the octal number system.

Discuss this Question

10. What is the base of the hexadecimal number system?

  1. 10
  2. 16
  3. 20
  4. 18

Answer: B) 16

Explanation:

The base of the hexadecimal number system is = 6.

Discuss this Question

11. What is the range of the hexadecimal number system?

  1. 0 to 10 and A to F
  2. 0 to 9 and A to F
  3. 1-10 and A to E
  4. 0-9 and A to E

Answer: B) 0 to 9 and A to F

Explanation:

The range of the hexadecimal number system is: 0 to 9 and A to F.

Discuss this Question

12. All unsigned numbers are ____.

  1. Positive
  2. Negative

Answer: A) Positive

Explanation:

All unsigned numbers are positive.

Discuss this Question

13. What is the full form of MSB?

  1. Main significant bit
  2. Minimum significant bit
  3. Most significant bit

Answer: C) Most significant bit

Explanation:

MSB stands for the most significant bit.

Discuss this Question

14. MSB of signed binary numbers is also known as ____.

  1. Most bit
  2. Min bit
  3. Signed bit
  4. Sign bit

Answer: D) Sign bit

Explanation:

MSB of signed binary numbers is also known as the sign bit.

Discuss this Question

15. How many types of representation are there for signed binary numbers?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: C) 3

Explanation:

There are three types of representations for signed binary numbers:

  • Sign-Magnitude form
  • 1's complement form
  • 2's complement form

Discuss this Question

16. 1's complement of positive number gives a ____ number.

  1. Positive number
  2. Negative number
  3. Both

Answer: B) Negative number

Explanation:

1's complement of a positive number gives a negative number.

Discuss this Question

17. 1's complement of negative number gives a ____ number.

  1. Positive
  2. Negative
  3. Original signed binary number

Answer: A) Positive

Explanation:

1's complement of a negative number gives a positive number.

Discuss this Question

18. If you do two times the one's complement of a binary number including the sign bit, what result you would get?

  1. Positive
  2. Negative
  3. Original signed binary number

Answer: C) Original signed binary number

Explanation:

If you do two times the one's complement of a binary number including the sign bit, you will get the original signed binary number.

Discuss this Question

19. The 2's complement of positive number gives a ____ number?

  1. Negative number
  2. Positive number

Answer: A) Negative number

Explanation:

The 2's complement of a positive number gives a negative number.

Discuss this Question

20. What will be the 1's complement of 50 in binary number?

  1. 110010
  2. 001101
  3. 110110

Answer: C) 110110

Explanation:

First step is to convert the decimal 50 into binary which is equal to 110010, now to find the 1's complement just replace 0 with 1 therefore the final answer is = 001101.

Discuss this Question

21. What will be the 1's complement of 30 in binary number?

  1. 11110
  2. 00000
  3. 11111
  4. 00001

Answer: D) 00001

Explanation:

First step is to convert decimal 30 to binary i.e., 11110, now just change the value of 0 to 1 and 1 to 0 therefore the final answer is = 00001.

Discuss this Question

22. Binary codes are classified into how many types?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: D) 2

Explanation:

Binary codes are classified into 2 types:

  • Weighted codes
  • Unweighted codes

Discuss this Question

23. Weighted codes are classified into how many types?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: D) 2

Explanation:

Weighted codes are classified into 2 types: positively weighted codes and negatively weighted codes.

Discuss this Question

24. What is the full form of BCD?

  1. Base decimal code
  2. Binary dialogue code
  3. Binary coded decimal
  4. Base-coded decimal

Answer: C) Binary coded decimal

Explanation:

BCD stands for binary coded decimal.

Discuss this Question

25. How many types of parity codes are there?

  1. 5
  2. 4
  3. 2
  4. 1

Answer: C) 2

Explanation:

There are two types of parity codes: Even parity code and odd parity code.

Discuss this Question

26. The value of an even parity bit should be ____ if an even number of ones is present in the binary code.

  1. 0
  2. 1

Answer: A) 0

Explanation:

If the binary code has an even number of ones, the value of the even parity bit should be zero.

Discuss this Question

27. Even parity bit is used only for ____.

  1. Error detection
  2. Error correction

Answer: A) Error detection

Explanation:

Even parity bit is used only for Error detection.

Discuss this Question

28. The value of the odd parity bit should be ____ if an odd number of ones is present in the binary code.

  1. 0
  2. 1

Answer: A) 0

Explanation:

If there are an odd number of ones in the binary code, the value of the odd parity bit should be zero.

Discuss this Question

29. Hamming code is used for ____.

  1. Error detection
  2. Error correction
  3. None
  4. Both

Answer: D) Both

Explanation:

Hamming code is used for Error detection and Error correction.

Discuss this Question

30. Which of the following theorem is used to find the complement of the Boolean function?

  1. Duality theorem
  2. DeMorgan's theorem

Answer: B) DeMorgan's theorem

Explanation:

DeMorgan's theorem is used to find the complement of a Boolean function.

Discuss this Question

31. What do you mean by Canonical SoP?

  1. Canonical sum of products
  2. Canonical solution of problems
  3. Canonical solution of products

Answer: A) Canonical sum of products

Explanation:

Canonical SoP stands for Canonical sum of products.

Discuss this Question

32. Canonical SoP form is also known as ____.

  1. Sum of Max terms
  2. Sum of Min terms

Answer: B) Sum of Min terms

Explanation:

Canonical SoP form is also known as the Sum of min terms form.

Discuss this Question

33. Canonical PoS form is also known as ____.

  1. Product of Max terms
  2. Sum of Max terms
  3. Product of Min terms
  4. Sum of Min terms

Answer: A) Product of Max terms

Explanation:

Canonical PoS is also known as Product of Max terms.

Discuss this Question

34. What is the number of cells in 3 variable K-map?

  1. 5
  2. 2
  3. 6
  4. 8

Answer: D) 8

Explanation:

There are 8 cells in 3 variable K-map.

Discuss this Question

35. What is the number of cells in 2 variable K-map?

  1. 4
  2. 2
  3. 6
  4. 8

Answer: A) 4

Explanation:

There are 4 cells in 2 variable K-map.

Discuss this Question

36. What is the number of cells in 4 variable K-map?

  1. 32
  2. 16
  3. 20
  4. 14

Answer: B) 16

Explanation:

There are 16 cells in 4 variable K-map.

Discuss this Question

37. What is the number of cells in 5 variable K-map?

  1. 40
  2. 24
  3. 32
  4. 20
  5. 14

Answer: C) 32

Explanation:

There are 32 cells in 5 variable K-map.

Discuss this Question

38. Ex-OR and Ex-NOR gate comes under which category of the gate?

  1. Basic gate
  2. Special gate
  3. Universal gate

Answer: B) Special gate

Explanation:

Ex-OR and Ex-NOR gate comes under the category of special gate.

Discuss this Question

39. Which of the following is the universal gate?

  1. NAND
  2. NOR
  3. Both
  4. None

Answer: C) Both

Explanation:

NAND and NOR both come under the category of universal gate.

Discuss this Question

40. ____ form is used when the output of a two-level logic realization cannot be achieved using a single logic gate.

  1. Non-degenerative
  2. Degenerative

Answer: A) Non-degenerative

Explanation:

Non-degenerative form is used when the output of a two-level logic realization cannot be achieved using a single logic gate.

Discuss this Question

41. Octal to binary encoder has how many inputs?

  1. 2
  2. 8
  3. 16
  4. 1

Answer: B) 8

Explanation:

Octal to binary encoder has 8 inputs.

Discuss this Question

42. A 4*1 mux has how many inputs?

  1. 5
  2. 4
  3. 2
  4. 1

Answer: B) 4

Explanation:

4*1 mux has 4 data inputs, two selection lines, and one output.

Discuss this Question

43. What do you mean by PLDs?

  1. Programmable Logic devices
  2. Perfect Logic devices
  3. Prune Logic devices
  4. Personal Logic devices

Answer: A) Programmable Logic devices

Explanation:

PLDs are known as Programmable Logic devices. These are the integrated circuits.

Discuss this Question

44. How many types of PLDs are there based on the types of arrays?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: C) 3

Explanation:

On the basis of type of array there are 3 kinds of PLDs:

  • Programmable Read Only Memory
  • Programmable Array Logic
  • Programmable Logic Array

Discuss this Question

45. Which of the following statement is correct?

  1. PROMs are programmable logic devices with fixed AND and programmable OR arrays
  2. PROMs are programmable logic devices with fixed NAND and programmable OR arrays
  3. PROMs are programmable logic devices with fixed NOR and programmable OR arrays

Answer: A) PROMs are programmable logic devices with fixed AND and programmable OR arrays.

Explanation:

PROMs are programmable logic devices with fixed AND and programmable OR arrays.

Discuss this Question

46. Which of the following statement is TRUE about PAL (Programmable array logic)?

  1. PAL is a programmable logic device with a fixed NOR array and a programmable OR array
  2. PAL is a programmable logic device with a fixed AND array and a programmable NOR array
  3. PAL is a programmable logic device with a fixed OR array and a programmable AND array

Answer: C) PAL is a programmable logic device with a fixed OR array and a programmable AND array.

Explanation:

PAL is a programmable logic device with a fixed OR array and a programmable AND array.

Discuss this Question

47. PAL's outputs will be in the form of a ____.

  1. Product of sum
  2. Sum of products

Answer: B) Sum of products

Explanation:

PAL's outputs will be in the form of a sum of products.

Discuss this Question

48. The threshold gate has how many inputs and outputs?

  1. At least one output and only one input
  2. At least one input and only one output
  3. Any number of output and inputs

Answer: B) At least one input and only one output.

Explanation:

The threshold gate has at least one input and only one output.

Discuss this Question

49. How do you represent the threshold gate?

  1. Via circle
  2. Via Square
  3. Via Combinational circuit
  4. None

Answer: A) Via circle

Explanation:

A circle represents a threshold gate.

Discuss this Question

50. Which of the following statement is correct about the combinational and Sequential circuit?

  1. In sequential circuits Only the current inputs determine the outputs, and in combinational circuits, Outputs are determined by both the current inputs and the current state
  2. In combinational circuits, Only the current inputs determine the outputs and in sequential circuits, Outputs are determined by both the current inputs and the current state

Answer: B) In combinational circuits, Only the current inputs determine the outputs and in sequential circuits, Outputs are determined by both the current inputs and the current state.

Explanation:

In combinational circuits, Only the current inputs determine the outputs and in sequential circuits, Outputs are determined by both the current inputs and the current state.

Discuss this Question

51. Among combinational and sequential circuits in which of the following feedback is not present?

  1. Combinational Circuits
  2. Sequential Circuits

Answer: A) Combinational Circuits

Explanation:

In combinational circuits, feedback is not present.

Discuss this Question

52. How many types of sequential circuits are there?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: D) 2

Explanation:

There are two types of sequential circuits:

  • Asynchronous sequential circuits
  • Synchronous Sequential circuits

Discuss this Question

53. If all of the outputs of a sequential circuit change in response to the active transition of the clock signal, the sequential circuit is said to be ____.

  1. Asynchronous
  2. Synchronous

Answer: B) Synchronous

Explanation:

If all of the outputs of a sequential circuit change in response to the active transition of the clock signal, the sequential circuit is said to be synchronous.

Discuss this Question

54. How many types of triggers are used in sequential circuits?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: D) 2

Explanation:

Two types of triggers are used in sequential circuits:

  • Level triggering
  • Edge Triggering

Discuss this Question

55. How many types of level triggering are there?

  1. 2
  2. 3
  3. 4
  4. 5

Answer: A) 2

Explanation:

There are two types of level triggering:

  • Positive level triggering
  • Negative level triggering

Discuss this Question

56. ____ level triggering occurs when the sequential circuit is operated with the clock signal while it is in Logic High.

  1. Positive level triggering
  2. Negative level triggering

Answer: A) Positive level triggering

Explanation:

Positive level triggering occurs when the sequential circuit is operated with the clock signal while it is in Logic High.

Discuss this Question

57. How many types of edge triggering are there based on the transitions of the clock signal?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: D) 2

Explanation:

There are two types of edge triggering based on the transitions of clock signal:

  • Positive level triggering
  • Negative level triggering

Discuss this Question

58. What is the full form of the SR latch?

  1. Set Reset Latch
  2. Set Remind Latch
  3. Save Reset Latch

Answer: A) Set Reset Latch

Explanation:

SR latch stands for Set reset latch.

Discuss this Question

59. Which of the following is the drawback of the SR latch?

  1. When both S and R are zero, the next state value cannot be predicted
  2. When both S and R are one, the next state value cannot be predicted
  3. When both S and R are one, the next state value can be predicted

Answer: B) When both S and R are one, the next state value cannot be predicted.

Explanation:

SR latch has a drawback i.e., When both S and R are one, the next state value cannot be predicted.

Discuss this Question

60. What is the full form of a D latch?

  1. Datagram latch
  2. Dataset latch
  3. Database latch
  4. Data latch

Answer: D) Data latch

Explanation:

Full form of the D latch is the Data latch.

Discuss this Question

61. Which of the following is the simplest version of the JK flipflop?

  1. T flip-flop
  2. SR flip-flop
  3. D flip-flop

Answer: A) T flip-flop

Explanation:

T flip-flop is the simplest version of JK flip-flop.

Discuss this Question

62. The ____ is a collection of flip-flops that are used to store binary data.

  1. Log
  2. Database
  3. Ledger
  4. Register

Answer: D) Register

Explanation:

The register is a collection of flip-flops that are used to store binary data.

Discuss this Question

63. The register is known as a ____- register if it is capable of moving bits either to the right or to the left.

  1. Flag
  2. Shift
  3. Accumulator
  4. Stack

Answer: B) Shift

Explanation:

The register is known as a shift register if it is capable of moving bits either to the right or to the left.

Discuss this Question

64. An 'N' bit shift register contains ____ flip-flops.

  1. N-1
  2. N+1
  3. N
  4. N2

Answer: C) N

Explanation:

An 'N' bit shift register contains 'N' flip-flops.

Discuss this Question

65. ____ shift register is a shift register that accepts serial input and outputs serial output.

  1. SISO
  2. SIPO
  3. PISO
  4. PIPO

Answer: A) SISO

Explanation:

Serial In - Serial Out SISO shift register is a shift register that accepts serial input and outputs serial output.

Discuss this Question

66. Shift registers are used as ____.

  1. Parallel to serial converter
  2. Serial to parallel converter
  3. Sequence generator
  4. Counters
  5. All of the above

Answer: E) All of the above

Explanation:

Shift registers are used as:

  • Parallel to serial converter
  • Serial to parallel converter
  • Sequence generator
  • Counters

Discuss this Question

67. When a counter counts from 0 to 2N -1, it is referred to as a ____ counter.

  1. Binary down counter
  2. Binary up counter

Answer: B) Binary up counter

Explanation:

When a counter counts from 0 to 2N- 1, it is referred to as a binary up counter.

Discuss this Question

68. How many types of counters are there based on the flip-flops?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: D) 2

Explanation:

There are two types of counters based on the flip flops:

  • Asynchronous counter
  • Synchronous counter

Discuss this Question

69. If the flip-flops do not receive the same clock signal, the counter is referred to as ____.

  1. Asynchronous
  2. Synchronous

Answer: A) Asynchronous

Explanation:

If the flip-flops do not receive the same clock signal, the counter is referred to as asynchronous.

Discuss this Question

70. The synchronous sequential circuits is also known as ____.

  1. Finite state machine
  2. Regular expression
  3. Grammar

Answer: A) Finite state machine

Explanation:

Synchronous sequential circuits is also known as Finite state machine.

Discuss this Question

71. How many types of Finite state machines are there?

  1. 5
  2. 4
  3. 3
  4. 2

Answer: D) 2

Explanation:

There are two types of FSM:

  • Mealy state machine
  • Moore state machine

Discuss this Question

72. A ____ machine is a finite state machine in which the current state and current input symbol determine the future state.

  1. Moore
  2. Mealy

Answer: A) Moore

Explanation:

A Moore machine is a finite-state machine in which the current state and current input symbol determine the future state.

Discuss this Question

73. What is the Mealy machine?

  1. A Mealy machine is a machine in which the output symbol depends upon the present input symbol and the present state of the machine
  2. A Mealy machine is a machine in which the output symbol depends upon the present input symbol and the next state of the machine
  3. A Mealy machine is a machine in which the output symbol depends upon the next input symbol and the next state of the machine
  4. A Mealy machine is a machine in which the output symbol depends upon the next input symbol and the present state of the machine

Answer: A) A Mealy machine is a machine in which the output symbol depends upon the present input symbol and the present state of the machine.

Explanation:

A Mealy machine is a machine in which the output symbol depends upon the present input symbol and the present state of the machine.

Discuss this Question

74. What do you mean by ASM charts?

  1. Algorithmic state machine
  2. Altar state machine
  3. Algo state machine

Answer: A) Algorithmic state machine

Explanation:

ASM stands for Algorithmic state machine.

Discuss this Question

75. In ASM charts state box is represented in which shape?

  1. Oval
  2. Cube
  3. Triangle
  4. Rectangular

Answer: D) Rectangular

Explanation:

In ASM charts state box is represented in a rectangular shape.

Discuss this Question

76. In ASM charts decision box is represented in which shape?

  1. Oval
  2. Cube
  3. Triangle
  4. Diamond

Answer: D) Diamond

Explanation:

In ASM charts decision box is represented in a diamond shape.

Discuss this Question

77. In ASM charts conditional output box is represented in which shape?

  1. Oval
  2. Cube
  3. Triangle
  4. Square

Answer: A) Oval

Explanation:

In ASM charts conditional output box is represented in an oval shape.

Discuss this Question



Comments and Discussions!

Load comments ↻



Top MCQs
Top Programs/Examples
Top Tutorials
About
Student's Section
Subscribe

Copyright © 2024 www.includehelp.com. All rights reserved.