B.TechSemester 42024-25Digital ElectronicsBOE410

Digital Electronics (BOE410) - AKTU Question Paper 2024-25

B.Tech · Semester 4 · Free PDF Download

This is the official AKTU Digital Electronics Previous Year Question Paper for B.Tech Semester 4, academic session 2024-25. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 4

Session:2024-25

University:AKTU / UPTU

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Questions Asked in 2024-25

Digital Electronics (BOE410) — complete question paper · 70 marks · 3 Hours

Section AAttempt all questions in brief. 02 x 7 = 14

a
Convert the hexadecimal number 3F to binary
b
What is 1's complement and how is it different from 2's complement?
c
What is the function of a decoder in digital circuits?
d
Define the characteristic equation of a flip-flop
e
What is the role of state reduction in sequential circuit design?
f
State any two differences between PLA and PAL
g
Define Fan-in and Fan-out in logic families

Section BAttempt any three of the following: 07 x 3 = 21

a
Explain SOP and POS forms with examples
b
Design a 4:1 multiplexer using basic logic gates
c
Draw the block diagram of a synchronous decade counter and explain its working
d
What are the steps in designing an asynchronous sequential circuit?
e
Compare TTL and CMOS logic families in terms of power consumption and speed

Section CAttempt any one part of the following: 07 x 1 = 07

a
What is Gray Code? Convert (1010)₂ to Gray Code and explain its significance
b
Using K-map, simplify the Boolean expression and implement i t using only NOR gates
a
Explain the design and working of a 2-bit magnitude comparator
b
Design a full adder using two half adders and an OR gate
a
Explain the JK flip-flop using logic diagram and characteristic table
b
Draw and explain the working of a bidirectional shift register
a
Discuss hazards in asynchronous circuits. How can race conditions be avoided?
b
Explain the role of flow table in designing asynchronous sequential circuits
a
Explain the internal structure a nd implementation method of ROM f o r a 3 - v a r i a b l e Boolean function
b
Write a short note on CMOS logic family. Discuss its advantages over TTL

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.