DISTANCE EDUCATION
B.Sc. (Computer Science) DEGREE EXAMINATION,
MAY 2018.
DIGITAL COMPUTER FUNDAMENTALS
(2007 Onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
All questions carry equal marks.
x 20 100)
1. Convert the following numbers from one base to
another base
(79A)16 to decimal
(1010)10 to octal
(10000011)2 to Hexa
(650)8 to binary
Explain the Excess 3 and BCD codes with
examples. Mention their applications.
2. Perform the following arithmetic operations
(100011 110000)2
(777 233)8
(123AB 11 1DD)16
(1000.111 111.11)2
Sub. Code
13
DE-3611
2
Sp 6
Simplify the following Boolean expressions
AB A(B B(B
A AB AB'C
F A'BC AB'C ABC' ABC
H XY X(Y Y(Y
3. Simplify the following expression using K Map
10, 15) 13)
Draw the logic diagram for simplified expression.
Describe parallel binary adder with a neat diagram.
4. How the Addition and subtraction operations are
performed in ALU?
Discuss the function of Half and Full adder with
neat diagrams.
5. Explain the Master Slave Flip flop with circuit
diagram and truth table.
What are shift registers? Explain the working of
4 bit Serial In Serial Out Shift register.
6. What is Multiplexer? Design a 8:1 Multiplexer and
explain.
State and Prove De Morgan's theorem.
7. Explain Gated Flip Flops.
Describe a 4 bit binary counter with a neat diagram.
8. Write a short notes on following
ASCII code
Decoder
Product of Sum expressions
Processor.