BITM 2nd Semester
Digital Logic Board Question Paper 2023

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TRIBHUVAN UNIVERSITY
FACULTY OF MANAGEMENT
Office of the Dean
Model Question 2026
Full Marks:60 Pass Marks:30 Time:3 Hrs
BITM /
Second Semester /
ITM151:
Digital Logic

Candidates are required to give their answers in their own words as for as practicable.
The figures in the margin indicate full marks

Long Answer Questions
Section "A"

Concept Based Brief Answer Questions (Answer the following questions: (Attempt All))

[5 × 2 = 10]
1.

Simplify xy+x'z+yz to minimum number of literals using Boolean Algebra.

2.

Implement OR and AND gate using NAND gates only.

3.

We can't have both input 1 in a basic flip flop constructed with NOR gates Justify.

4.

In what case is it economical to use PLA than PAL? Explain

5.

List out the major characteristics of IC.

Section "B"

Problem Solving / Short Answer Questions (Answer any SIX Questions)

[6 × 5 = 30]
6.

Differentiate between T and JK flip-flop along with its Truth Table and logic diagram.

7.

Implement the function F(W,X,Y,Z)=∑(0,2,4,6,10,12,14) using multiplexer.

8.

Design a 3-bit synchronous binary counter using any flip-flop.

9.

What is Shift Register? You are provide with a bit sequence 1101, and you are asked to extract those bits after right shifting. Which shift register would you use? Discuss with necessary block diagrams and timing diagrams.

10.

Design 8X1 multiplexer

11.

Design a 3-bit synchronous counter.

12.

Mention the design procedure of a combinational circuit.

Section "C"

Comprehensive / Extended Problem / Case / Situation Analysis / Long Answer Questions (Answer any TWO Questions)

[2 × 10 = 20]
13.

Design 4X16 decoder using suitable number of 2X4 along with its truth table and explain its operating mechanism.

14.

Design a circuit diagram for a given state diagram following standard design procedure
state diagram with states S0, S1, S2

15.

Design a MOD-16 synchronous Up/Down Counter.