B.TechSemester 32024-25Digital ElectronicsBOE310

Digital Electronics (BOE310) - AKTU Question Paper 2024-25

B.Tech · Semester 3 · Free PDF Download

This is the official AKTU Digital Electronics Previous Year Question Paper for B.Tech Semester 3, 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 3

Session:2024-25

University:AKTU / UPTU

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Questions Asked in 2024-25

Digital Electronics (BOE310) — complete question paper · 70 marks · 3 Hours

Section AAttempt all questions in brief. 2 x 07 = 14

a
What are SOP and POS forms?
b
Which logic gates are called universal gates?
c
What is a magnitude comparator used for?
d
What is the advantage of a synchronous counter over an asynchronous counter?
e
What are essential hazards?
g
Which logic family consumes the least power?

Section BAttempt any three of the following: 7 x 3 = 21

a
Convert the following numbers to their respective bases: i) (47.625)₁₀ to binary ii) (101101.101)₂ to decimal iii) (3F9)₁₆ to decimal iv) (543)₈ to binary
b
Discuss multiplexed display systems. How are they used in practical applications?
c
Explain flip-flop conversion. How can a JK flip-flop be converted into a D flip- flop?
d
What is race -free state assignment? Why is it necessary in asynchronous sequential circuits?
e
What is Programmable Logic Arrays (PLA)? Explain their structure and working

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

a
Design an excess 3 to BCD code converter
b
Discuss the Karnaugh map (K-map) method for Boolean function simplification. Simplify the following Boolean function using K-map and also draw the simplified logic circuit using basic gates
a
Explain the working of a BCD adder. How does it differ from a binary adder?
b
Describe half subtractor circuits with truth tables and circuit diagrams
a
What are synchronous counters? Explain the design and working of a 4 -bit synchronous counter
b
Explain Johnson counters with timing diagrams and applications
a
What is the significance of state assignment? List the different techniques for state assignment
b
Explain the differences between synchronous and asynchronous sequential circuits with examples
a
Explain the structure and operation of a static RAM (SRAM) and dynamic 5 K2 RAM (DRAM)
b
Describe the circuit implementation and working of TTL logic gates

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.

Repeated Questions — BOE310

Questions that appeared in more than one session, found by comparing 2 years of Digital Electronics papers (2024-25, 2025-26)

Explain Johnson counters with timing diagrams and applications

Appeared in: 2024-25 · 2025-26

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