Digital Electronics Multiple Choice Questions and Answers - Computer Science

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Computer Science : Digital Electronics

Here we discuss the multiple choice questions of digital electronics that covers many important and interesting concepts about computer.
1. The schmitt trigger may be used to?
[A] change voltage to corresponding frequency
[B] Change frequency to voltage
[C] Square slowly varying input
[D] None of above

Answer: C. Square slowly varying input

2. Which of the following is minimum error code?
[A] Octal code
[B] Grey code
[C] Binary code
[D] Excess 3 code

Answer: B. Grey code

3. Popular application flip-flop are ?
[A] Counters
[B] Shift registers
[C] Transfer registers
[D] All of above

Answer: D. All of above

4. SR Flip flop can be converted to T-type flip-flop if ?
[A] S is connected to Q
[B] R is connected to Q
[C] Both S and R are shortend
[D] S and R are connected to Q and Q' respectively

Answer: D. S and R are connected to Q and Q' respectively

5. Register is a ?
[A] Set of capacitor used to register input instructions in a digital computer
[B] Set of paper tapes and cards put in a file
[C] Temporary storage unit within the CPU having dedicated or general purpose use
[D] Part of the auxiliary memory

Answer: C. Temporary storage unit within the CPU having dedicated or general purpose use

6. For which of the following flip-flop the output clearly defined for all combinations of two inputs?
[A] Q type flip-flop
[B] R S type flip-flop
[C] J K flip-flop
[D] T flip-flop

Answer: C. J K flip-flop

7. A simple flip-flop
[A] is 2 bit memory
[B] is 1 bit memory
[C] is a four state device
[D] has nothing to do with memory

Answer: B. is 1 bit memory

8. An SR flip flop cannot accept the following input entry
[A] Both input zero
[B] zero at R and one at S
[C] zero at S and one at R
[D] Both inputs one

Answer: D. Both inputs one

9. The main difference between JK and RS flip-flop is that?
[A] JK flip-flop does not need a clock pulse
[B] there is feedback in JK flip-flop
[C] JK flip-flop accepts both inputs as 1
[D] JK flip-flop is acronym of junction cathode multivibrator

Answer: C. JK flip-flop accepts both inputs as 1

10. Radix of binary number system is _____?
[A] 0
[B] 1
[C] 2
[D] A & B

Answer: C. 2


Radix or Base of Binary Number System is 2.

Comments: (Your feedback is valuable to us)

hani 1 month ago Reply

good...but need more questions

Sainaveen Ravela 1 month ago Reply

need more questions on different types of flipflops

Taiyaba 2 months ago Reply

Nice but I need pdf.

Sandip Jadhav 3 months ago Reply

It's best mcq thanq

Feroz 4 months ago Reply

Its best mcq

nalini 6 months ago Reply


Saddam husain 11 months ago Reply


Er Saddam Husain
BE (ECE) 2016

Umang yadav 11 months ago Reply

Need more

CM SHARMA 11 months ago Reply

NEED Sequential Circuit questioms

Ann 1 year ago Reply

need more

yuvraj 1 year ago Reply


sarat akasapu 1 year ago Reply

Good but some bits are repetitive

Muhammad Samiullah Khan 2 years ago Reply

nice efforts