DISTANCE EDUCATION
B.Sc. (Computer Science) DEGREE EXAMINATION,
MAY 2016.
DIGITAL COMPUTER FUNDAMENTALS
(2007 Onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
All questions carry equal marks.
20 100)
1. Explain number codes and character codes.
Convert the following numbers from the given base
to the other bases mentioned.
111110 1112 to decimal
AB616 to Decimal
15 F16 to Binary
156810 to Octal.
2. Explain the rules for the following OPERATIONS with
suitable example.
Binary Addition
Binary Subtraction
Binary complement addition
Binary complement subtraction.
3. Simplify the following Boolean functions using four
Variable maps.
10, 13,
11, 13, 14, .
Sub. Code
13
DE-3395
2
wk9
Simplify the following expressions in product -ofsums
form.
ABCD
xy .
4. Explain with neat sketch Master Slave JK flip-flop.
Simplify the following
x
xy yz .
5. Explain half adder and full adder with neat sketch.
Design a 4-bit binary adder/subtractor. Explain its
functions.
6. Describe the following with functions, block
diagram, waveforms and truth table.
4 bit-binary ripple counter
4 bit-binary up-down counter.
Design and explain NOR gate latch and NAND gate
latch using RS-flip flop.
7. Explain shift registers.
Explain binary counter.
8. Explain in detail the concepts of input-output units and
computer memory.