Digital Electronics - ECE Questions and Answers

This is the electronics and communication engineering questions and answers section on "Digital Electronics" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand. Are you preparing for an upcoming Digital Electronics ECE competitive examination? Ok, start with a Digital Electronics ECE trial mock test series which will help you know what exactly you need to do. Attempt these set of Digital Electronics ECE questions and see how you are able to score in the Digital Electronics ECE Online Test. Digital Electronics ECE MCQ Questions and answers are updated on this page to help the postulates. Preparing according to the perfect planner job seeking aspirants can ace the Digital Electronics ECE Quiz. Because on our site we had enclosed Digital Electronics ECE questions in Multiple Choice Format.

Digital Electronics ECE Questions - Digital Electronics ECE Quiz Details

Online Test Name	Digital Electronics
Exam Type	Multiple Choice Questions
Category	Electronics and Communication Engineering Quiz
Number of Questions	44 Questions

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Digital Electronics ECE Quiz Topics Covered

Digital Electronics ECE Quiz Topics are Number Systems, Memory Devices, Binary Codes, Logic Gates, Boolean Algebra, Minimization Techniques, Flip Flops, Logic Families, Arithmetic Circuits, Combinational Circuits, Counters, Shift Resistors, Display Devices & Systems, Analog to Digital and Digital to Analog Converters. To know more updates and Digital Electronics ECE questions and answers in the given topics stick to our web portal for more latest Digital Electronics ECE Quizzes.

Digital Electronics ECE MCQ Quiz Answers With Solutions

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1. The output of a JK flipflop with asynchronous preset and clear inputs is '1'. The output can be changed to '0' with one of the following conditions

A. By applying J = 0, K = 0 and using a clock
B. By applying J = 1, K = 0 and using the clock
C. By applying J = 1, K = 1 and using the clock
D. By applying a synchronous preset input

Answer & Explanation

Answer: Option C

Explanation:

Preset state of JK Flip-Flop =1 With J=1 K=1 and the clock next state will be complement of the present state

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2. A full adder logic circuit will have

A. Two inputs and one output
B. Three inputs and three outputs
C. Two inputs and two outputs
D. Three inputs and two outputs

Answer & Explanation

Answer: Option D

Explanation:

A full adder circuit will add two bits and it will also accounts the carry input generated in the previous stage. Thus three inputs and two outputs (Sum and Carry) are there.

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3. For which of the following purpose Karnaugh map is used

A. Reducing the electronic circuits used
B. To map the given Boolean logic function
C. To minimize the terms in a Boolean expression
D. To maximize the terms of a given a Boolean expression

Answer & Explanation

Answer: Option C

Explanation:

To minimize the terms in a Boolean expression

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4. Which of the following is a universal logic gate?

A. OR
B. AND
C. XOR
D. NAND

Answer & Explanation

Answer: Option D

Explanation:

A universal logic gate is one, which can be used to generate any logic function NAND can generate any logic function

To realize Y=CD+EF+G,

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5. How many two input AND and OR gates are required

A. 2,2
B. 2,3
C. 3,3
D. None of these

Answer & Explanation

Answer: Option A

Explanation:

Y=CD+EF+G

Number of two input AND gates=2

Number of two input OR gates = 2

One OR gate to OR CD and EF and next to OR of G & output of first OR gate