DISTANCE EDUCATION
M.C.A. DEGREE EXAMINATION, DECEMBER 2017.
First Semester
DIGITAL COMPUTER ORGANIZATION
(2010 Academic Year onwards)
Time Three hours Maximum 100 marks
PART A — X 8 40 marks)
Answer any FIVE questions.
1. Convert the following
(1A5D)16 into Decimal.
(10767)10 into Hexadecimal.
2. State and prove Demorgan's theorem.
3. What is demultiplexer? Discuss the functions of a
demultiplexer.
4. What is an XOR gate? Write its T.T and realize it using
AND, OR and NOT gates.
5. Draw the circuit diagram of a shift register and explain
its working in detail.
6. Explain in short about counters.
7. Distinguish between Static and Dynamic RAM.
8. What are the different steps used for executing an
instruction? Explain.
Sub. Code
101
DE-2983
2
Ws9
PART B — X 15 60 marks)
Answer any FOUR questions.
10. Explain the principles of Universal shift register with a
neat schematic diagram.
11. Explain Up Down parallel counter with necessary
diagram.
12. What is the difference between the synchronous and
asynchronous counters? Explain with neat diagram about
asynchronous counter.
13. Draw the schematic diagram of a master-slave j-k flipflop.
Discuss its working principle. What are its
advantages over other type of flip-flop?
14. What are interrupts? Why are they used? Explain what
happens when a computer recognizes an interrupt?
15. Write short notes on I/O interfaces.
Explain DMA in detail.
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