B.TechSemester 42024-25Digital ElectronicsBOE410
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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) — extracted question text · 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. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

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