Sign In / Sign Up

Digital Electronics MCQ Electrical Engineering

Attempt now to check your rank among 42 students! 50 Questions 30 Mins

About Digital Electronics

Following are some of the multiple choice questions on the Digital Electronics with answers that will help the students in developing their knowledge.

Digital Electronics MCQ

1. Which of the following is Universal Gate?

OR gate
NAND gate
AND gate
NOR gate

2. An AND gate will function as OR if

All the inputs to the gates are “1”
All the inputs are ‘0’
Either of the inputs is “1”
All the inputs and outputs are complemente'

3. Most of the digital computers do not have floating point hardware because

Floating point hardware is costly
It is slower than software
It is not possible to perform floating point addition by hardware
Of no specific reason

4. Which type of CPLD packaging can provide maximum number of pins on the package due to small size of the pins?

PLCC
QFP
PGA
BGA

5. Which is the example of digital device from the given option ?

Record players
Microprocessors
Sensors
Thermistors

6. Which of the following is Inverter?

OR gate
NOT gate
AND gate
NAND GATE

7. The Four common and useful MSI circuits are

Decoder
Encoder
Demultiplexer
All of the above

8. The NOR gate is OR gate followed by which gate ?

AND gate
NOT gate
NAND gate
None of the mentioned

9. The only function of NOT gate is to ___________.

Stop signal
Invert input signal
Act as a universal gate
None of the above

10. Digital circuit can be made by the repeated use of ___________

OR gates
NOT gates
NAND gates
None of the above

11. "What would happen, if smaller logic modules are utilized for performing logical functions associated with FPGA? A. Propagation delay will increase B. FPGA area will increase C. Wastage of logic modules will not be prevented D. Number of interconnected paths in device will decrease"

A & B
C & D
A & D
B & C

12. The inverter is ___________

NOT gate
OR gate
AND gate
None of the above

13. What is/are the configurable functions of each and every IOBs connected around the FPGA device from the operational point of view?

Input operation
Tristate output operation
Bi-directional I/O pin access
All of the above

14. The binary number 10101 is equivalent to decimal number ___________.

19
12
27
21

15. Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is.

10 CPS
120 CPS
12 CPS
None of the above

16. When an input signal 1 is applied to a NOT gate, the output is ___________.

0
1
Either 0 & 1
None of the above

17. Which of the following gate is a two-level logic gate

OR gate
NAND gate
EXCLUSIVE OR gate
NOT gate

18. The NOR gate is OR gate followed by ___________.

AND gate
NAND gate
NOT gate
None of the above

19. Excess-3 code is known as

Weighted code
Cyclic redundancy code
Self-complementing code
Algebraic code

20. The NAND gate is AND gate followed by ___________.

NOT gate
OR gate
AND gate
None of the above

21. Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

TTLAS
CMOS
ECL
TTLLS

22. In Boolean algebra, the bar sign (-) indicates ___________.

OR operation
AND operation
NOT operation
None of the above

23. A hexadecimal odometer displays F 52 F. The next reading will be

F52E
G52F
F53F
F53O

24. The binary code of (21.125)10 is

10101.001
10100.001
10101.010
10100.111

25. NAND. gates are preferred over others because these

have lower fabrication area
can be used to make any gate
consume least electronic power
provide maximum density in a chip.

26. Which is the correct order of sequence for representing the input values in K-map?

(00, 01, 10, 11)
(00, 10, 01, 11)
(00, 01, 11, 10)
(00, 10, 11, 01)

27. The inputs of a NAND gate are connected together. The resulting circuit is ___________.

OR gate
AND gate
NOT gate
None of the above

28. Digital computers are more widely used as compared to analog computers, because they are

Less expensive
Always more accurate and faster
Useful over wider ranges of problem types
Easier to maintain

29. Consider the representation of six-bit numbers by two’s complement, one’s complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000?

Two’s complement only
Sign and magnitude and one’s complement only
Two’s complement and one’s complement only
All three representations

30. ............. Multiplexers can be constructed from smaller ones.

Larger
Small
Dimultiplexers
None of the above

31. A full adder have -

2 inputs, 2 outputs
2 inputs, 1 output
3 inputs, 2 outputs
3 inputs, 1 output

32. In Positive logic, logic gate 1 corresponds to -

Zero Voltage Level
Positive Voltage
Lower Voltage Level
Higher Voltage Level

33. An X-OR Gate Produces an output only when it's two inputs are -

Low
Different
Same
High

34. The Only Function of a Not gate is to -

Invert an input signal
Stop A signal
Act an universal set
Recomplement a signal

35. Combinations that not listed for the input variables are -

Borrow
Don't Care
Overflow
Carry

36. ASCII code is a .................... bit code.

8
7
2
1

37. Multiplexer means .....................

Many in to One
Many in to Many
One in to Many
None of the Above

38. Binary Number system has ........... symbols.

8
16
10
2

39. The Steps required for the analysis of combinational circuits are -

Obtain the functions of intermediate points and outputs
Label the inputs and outputs
Draw the truth table
All of the Above

40. There are two types of parity -

Odd
Even
Both 1 & 2
None of the above

41. ____________numbers are used in the decimal number system?

0 to 9
0 to 10
1 to 10
None of the above

42. The universal gate is ___________

NAND gate
OR gate
AND gate
None of the above

43. An OR gate has 6 inputs. The number of input words in its truth table are

6
32
64
128

44. In case of OR gate, no matter what the number of inputs, a

1 at any input causes the output to be at logic 1
1 at any input causes the output to be at logic 0
0 any input causes the output to be at logic 0
0 at any input causes the output to be at logic 1.

45. A + Ā is = ?

1
A
Ā

46. AND operation is equivalant to -

Intersection
Division
Union
none of the above

47. In the boolean algebra, a variable has ________ different state(s)/value(s).

3
1
2
4

48. Pick out the CORRECT statement:

In a positional number system, each symbol represents the same value irrespective of its position
The highest symbol in a position number system as a value equal to the number of symbols in the system
It is not always possible to find the exact binary
Each hexadecimal digit can be represented as a sequence of three binary symbols.

49. Storage of 1 KB means the following number of bytes

1000
964
1024
1064

50. The number 10000 would appear just immediately after

FFFF (hex)
1111 (binary)
7777 (octal)
All of the above

Enjoyed the Quiz. Share this with friends

Comments

Add Your Review

Your email address will not be published.

Ask a Question

Book Now & Get 50% Discount

Date of Expires 05/08/2019

How to use? Just show us this coupon on a screen

Coupon Code

DL76T

Advertisement

Quick Contact to Help?

For any Query regarding a website or any issue please contact with us we are here for solving your problem 24/7

Contact Us Now

Related MCQ's

Subscribe to Newsletter!

Subscribe to get latest updates and information.

Computer Science

Science

Commerce

Mathematics

Aptitude

General Knowledge

Copyright 2021. All Rights Reserved.