0 08000CS203122002 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Third Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

Course Code: CS203
Course Name: SWITCHING THEORY AND LOGIC DESIGN

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 3 marks. Marks
1 Convert the following numbers from the given base to the bases indicated (3)

೩) (153.87) to Hexadecimal
0) (127): to Decimal
€) (11101.1001)210 Octal

2 Differentiate digital systems and analogue systems. (3)
Represent +51 and -51 in 1’s complement and 2’s complement form (3)
4 Convert the following expression into sum of product and product of sum (3)

(AB + C) (B + C'D)

PART 0
Answer any two full questions, each carries 9 marks.

5 9७) Represent the number 85.125 using the double-precision floating point format (5)
IEEE-754 standard.
b) Find Subtraction of 1B06 and 77C using 15's complement method (4)
6 Simplify the following expressions using K-Map, and implement it with two- (9)
level NAND gate circuits:
AB’+ ABD + ABD'+ A'C’D'+ ۸۸"

7 Use tabulation method to identify the simplified Boolean expression for the (9)
function, F(A,B,C,D) = 21 (0,1,2,3,5,7,8,10,12,13,15)
PART C
Answer all questions, each carries 3 marks.
8 Give the design and circuit for a half adder (3)
9 Implement the function F(A, 8, C, D) = (0, 1, 3, 5,7, 10, 12, 13) usinga4X1 (3)
multiplexer
10 Differentiate combinational and sequential circuits. (3)

Page 1 of 2