B.TechSemester 42021-22Digital ElectronicsKOE049
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Digital Electronics (KOE049) - AKTU Question Paper 2021-22

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 2021-22. 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:2021-22
University:AKTU / UPTU

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Questions Asked in 2021-22

Digital Electronics (KOE049) — complete question paper

Section AAttempt all q u e s t i o n s i n b r i e f . 2x10 = 20
  • a
    Define the term binar y codes with an example. 1
  • b
    Differentiate between SOP & POS form. 1
  • c
    Define the term combinati onal logic with an example. 2
  • d
    Discuss universal gates. 2
  • e
    Explain the term Latch. 3
  • f
    Explain the term registers. 3
  • g
    Define Asynchronous circuits. 4
  • h
    Discuss hazards. 4 (i) Discuss logic family and its use. 5 (j) What do you mean by a memory? 5
Section BAttempt any three o f t h e f o l l o w i n g : 10x3 = 30
  • a
    Explain the implementation of an X-OR gate with NAND implementation
  • b
    Illustrate the working of S erial and parallel adders and differentiate the operations
  • c
    Explain the working of J-K Flip-Flop. 3
  • d
    Define the state reducti on steps for a machine. 4
  • e
    Discuss different type s of RAM memory cell. 5
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 10x1 = 10
  • a
    Minimize the following Boolean function using K Map
  • b
    Explain different steps asso ciated to Quine Mc Culsy (Tabul ar Method) of minimizing Boolean Functions
  • a
    Design a 4-bit magnitude comparator. 2
  • b
    Design a full adder and fu ll subtractor using NAND gates only. 2
  • a
    Describe the Design of J-K FF using T FF. 3
  • b
    Describe the operations and a pplications of a Serial-in Par allel-out Shift Register with a neat diagram
  • a
    Design a sequential circuit with two flip flops A & B and o ne input x. when x = 0, the state of the circuit remains the same and when x = 1 the circuit passes through the state transitions from 00 to 01 to 11 to 10 back to 00 and repeat
  • b
    A sequential circuit has two J K flip flops A & B, two inpu ts X & Y, and one output Z. The equations defining this system are as following: Design the circuit
  • a
    Explain the working and s tructure of EEPROM cell. 5
  • b
    Describe the difference between PAL & PLA using neat diagra m and suitable examples

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 — KOE049

Questions that appeared in more than one session, found by comparing 2 years of Digital Electronics papers (2021-22, 2022-23)

2x

Minimize the following Boolean function using K Map

Appeared in: 2021-22 · 2022-23

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