Sign In / Sign Up

Digital Electronics MCQ Electrical Engineering

Attempt now to check your rank among 19 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. Convert the following decimal number to 8-bit binary.

101110112
110111012
101111012
101111002

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

3
1
2
4

3. 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'

4. Which of the following is Universal Gate?

OR gate
NAND gate
AND gate
NOR gate

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

OR operation
AND operation
NOT operation
None of the above

6. 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

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

OR gate
AND gate
NOT gate
None of the above

8. A NAND gate is called a universal logic element because

It is used by everybody
Any logic function can be realized by NAND gates alone
All the minization techniques are applicable for optimum NAND gate realization
Many digital computers use NAND gates.

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

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

10. 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

11. 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

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

Record players
Microprocessors
Sensors
Thermistors

13. The full form of CML is

complementary mode logic
current mode logic
collector mode logic
collector mixed logic

14. The maximum noise voltage that may appear at the input of a logic gate without changing the logical state of its output is termed as

noise margin
noise immunity
white noise
signal to noise ratio

15. Fan-in is defined as

the number of outputs connected to gate without any degradation in the voltage levels
the number of inputs connected to gate without any degradation in the voltage levels
the number of outputs connected to gate with degradation in the voltage levels
the number of inputs connected to gate with degradation in the voltage levels

16. Fan-in is defined as

the number of outputs connected to gate without any degradation in the voltage levels
the number of inputs connected to gate without any degradation in the voltage levels
the number of outputs connected to gate with degradation in the voltage levels
the number of inputs connected to gate with degradation in the voltage levels

17. Power Dissipation in DIC is expressed in

watts or kilowatts
milliwatts or nanowatts
db
mdb

18. Power Dissipation in DIC is expressed in

watts or kilowatts
milliwatts or nanowatts
db
mdb

19. Propagation delay times can be divided as

t(plh) and t(lph)
t(lph) and t(phl)
t(plh) and t(phl)
t(hpl) and t(lph)

20. Propagation delay is defined as

the time taken for the output of a gate to change after the inputs have changed
the time taken for the input of a gate to change after the outputs have changed
the time taken for the input of a gate to change after the intermediates have changed
the time taken for the output of a gate to change after the intermediates have changed

21. CMOS refers to

continuous metal oxide semiconductor
complementary metal oxide semiconductor
centred metal oxide semiconductor
concrete metal oxide semiconductor

22. Applications of PLAs are

registered pals
configurable pals
pal programming
all of the mentioned

23. In FPGA, vertical and horizontal directions are separated by

a line
a channel
a strobe
a flip-flop

24. The full form of VLSI is

very long single integration
very least scale integration
very large scale integration
very long scale integration

25. The FPGA refers to

first programmable gate array
field programmable gate array
first program gate array
field program gate array

26. If a PAL has been programmed once

its logic capacity is lost
its outputs are only active high
its outputs are only active low
it cannot be reprogrammed

27. The difference between a PAL & a PLA is

pals and plas are the same thing
the pla has a programmable or plane and a programmable and plane, while the pal only has a programmable and plane
the pal has a programmable or plane and a programmable and plane, while the pla only has a programmable and plane
the pal has more possible product terms than the pla

28. Which type of device FPGA are?

sld
srom
eprom
pld

29. The complex programmable logic device contains several PLD blocks and

a language compiler
and/or arrays
global interconnection matrix
field-programmable switches

30. For programmable logic functions, which type of PLD should be used?

pla
pal
cpld
sld

31. Which one of the following is volatile in nature?

rom
erom
prom
ram

32. Static RAM employs

bjt or mosfet
fet or jfet
capacitor or bjt
bjt or mos

33. Dynamic RAM employs

capacitor or mosfet
fet or jfet
capacitor or bjt
bjt or mos

34. The magnetic core memories have been replaced by semiconductor RAMs, why?

semiconductor rams are highly flexible
semiconductor rams have highest storing capacity
semiconductor rams are smaller in size
all of the mentioned

35. The data written in flip-flop remains stored as long as

power is supplied
power is removed
power is supplied
power is removed

36. What is memory decoding?

the process of memory ic used in a digital system is overloaded with data
the process of memory ic used in a digital system is selected for the range of address assigned
the process of memory ic used in a digital system is selected for the range of data assigned
the process of memory ic used in a digital system is overloaded with data allocated in memory cell

37. How many address bits are required to select memory location in Memory decoder?

4 kb
8 kb
12 kb
16 kb

38. The first step in the design of memory decoder is

selection of a eprom
selection of a ram
address assignment
data insertion

39. PLA is used to implement

a complex sequential circuit
a simple sequential circuit
a complex combinational circuit
a simple combinational circuit

40. PLA contains

and and or arrays
nand and or arrays
not and and arrays
nor and or arrays

41. Outputs of the AND gate in PLD is known as

input lines
output lines
strobe lines
control lines

42. PAL refers to

programmable array loaded
programmable logic array
programmable array logic
programmable and logic

43. How many types of PLD is?

2
3
4
5

44. Logic circuits can also be designed using

ram
rom
pld
pla

45. PLD contains a large number of

flip-flops
gates
registers
all of the mentioned

46. A PLA is similar to a ROM in concept except that

it hasn’t capability to read only
it hasn’t capability to read or write operation
it doesn’t provide full decoding to the variables
it hasn’t capability to write only

47. IC 4116 is organised as

512 * 4
16 * 1
32 * 4
64 * 2

48. How memory expansion is done?

by increasing the supply voltage of the memory ics
by decreasing the supply voltage of the memory ics
by connecting memory ics together
by separating memory ics

49. How many 16K * 4 RAMs are required to achieve a memory with a capacity of 64K and a word length of 8 bits?

2
4
6
8

50. How many 1024 * 1 RAM chips are required to construct a 1024 * 8 memory system?

4
6
8
12

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

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.