Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2081.2

Bachelor Level / First Year / First Semester / Science

Bachelors in Information Technology (BIT103)

(Digital Logic)

Full Marks: 60

Pass Marks: 24

Time: 3 Hours

Candidates are required to give their answers in their own words as for as practicable.

The figures in the margin indicate full marks.

Section A

Long Answers Questions

Attempt any TWO questions.
[2*10=20]
1.
Express the Boolean Function F=AB+B′CF = AB + B'C to sum of max terms with required truth tables. List two uses of sum of max terms. [8+2]
2.
Differentiate between synchronous and asynchronous counter. Explain any one synchronous counter. [3+7]
3.
Design a combinational circuit that generates 9’s complement of a BCD number. [10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
Perform A−BA - B with the given binary numbers using 1’s complement. A=1010100A = 1010100, B=1000100B = 1000100. [5]
5.
Simplify the Boolean Function FF in sum of products using the don't-care conditions dd. F=B′C′D′+BCD′+ABCD′F = B'C'D' + BCD' + ABCD', d=B′CD′+A′BC′Dd = B'CD' + A'BC'D. [5]
6.
Explain the concept of decoder with an example. [5]
7.
List different memory types and explain basic memory operations. [5]
8.
Explain JK flip flop with necessary diagram and truth table. [5]
9.
Perform the following conversion: (a) (0.625)10(0.625)_{10} to binary. (b) (173)8(173)_8 to decimal. [2.5+2.5]
10.
Explain processor registers and ALU connection through common buses with a suitable diagram. [5]
11.
Show that the dual of the exclusive-OR is equal to its complement. [5]
12.
Write short notes on (a) Universal gate. (b) Status register. [2.5+2.5]