SRM University 2007 B.Tech Electronics and Communications Engineering Bank :: Digital Systems - Question Paper

S.R.M. Institute of Science & Technology
School of Electronics & Communication Engineering
ques. Bank
Subject Code EC201
Subject Name : Digital Systems
Year & Sem II Year , III Sem (ECE)
Unit-1
PART-A
1. Convert the hexadecimal number 68BE to binary number.
2. Convert decimal 34.435 to binary number.
3. Calculate the binary and octal equivalent of (5A32)16
4. Add the subsequent numbers without converting them to decimal
5. (1011)2 + (101)2
6. Find the 9’s complements of the subsequent decimal number
(98127634)10
7. Find the 10’s complements of the subsequent decimal number
(72049900)10
8. Obtain the 1’s and 2’s complement of the subsequent binary number
(11101010)2
9. Find the 1’s and 2’s complement of the subsequent binary number
(0111110)2
10. Find the 16’s complements of AF3B.
11. Perform the subtraction in the subsequent unsigned decimal number using 9’s complement method.
7188 – 3049
12. Perform the subtraction in the subsequent unsigned decimal using 10’s Complement method.
150 – 2100.
13. Perform the subtraction in the subsequent unsigned binary number using 1’s complement method.
11011 – 11001
14. perform the subtraction in the subsequent unsigned binary number using 2’s complement method.
1011 – 110000
15. Convert the subsequent numbers into binary and do the provided arithmetic operation and again convert into decimal.
a. 27+61
16. The subsequent decimal numbers are shown in sign magnitude form. Perform the addition operation.
+9826 and +801
17. Explain BCD and ASCII.
18. Explain Gray code and Excess-3 code
19. Explain EBCDIC
20. State DeMorgan’s Laws
21. Express the subsequent number in BCD and Excess-3 code. 425

PART-B
1. a) Express the subsequent in decimal
a) 10110.0101)2 b) (16.5)16 c) (26.24)8
2. Convert the subsequent numbers into hexadecimal and to decimal
a)1.11010 b. 1110.10
3. Perform the subsequent arithmetic operation in the provided BCD number:
533 + 299
732 – 579
4. Simplify using Quine McClusky method.
F = ? m(0, 1, 2, 3, 4, 7, 9, 10)
5. Construct the even parity, 7 bit Hamming code for transmission of data bits 1011.
6. Simplify using K-Map
F(W,X,Y,Z) = ?m(1,3,7,11,15) has the don’t care condition
d(W,X,Y,Z)= ?(0,2,5)
7. Obtain minimum sum of products form of the function
F(A,B,C,D) = ?m(2,3,6,7,11,13,14,15)
8. Simplify using Quine McClusky method.
F = ?m(0,2,3,6,7,8,9,10,13)
9. Simplify using Quine McClusky method.
F = ?m(0,1,2,3,4,6,8,11,12) + ?d(5,9,10).




UNIT-II
PART-A
1. What are the advantages of Digital Integrated Circuits?
2. Define Fan out
3. Define Noise Margin
4. What is Propagation Delay?
5. What is Power Dissipation?
6. Define Current Sinking.

Earning:   Approval pending.