Periyar University 2008 Post Graduate Diploma Computer Application PGDCA - Question Paper

P.G.D.C.A Examination, July/September 2008
Non – Semester
Computer Organisation

Three Hrs 100 Marks

Part – A [10 * two = 20]
ans ALL ques.

1. What is excess-3 code?
2. Convert octal 736.48 to decimal.
3. What is microoperations? provide examples.
4. What is binary adder?
5. What are the parts of instruction code?
6. What do you mean by hardwired control?
7. Define any 2 pseudo instructions.
8. Write a function of the 1st pass of an assembler.
9. What is a stack?
10. What is implied mode? provide an example.

Part – B[5 * seven = 35]
ans any 5 ques..

11. Explain about float point representation.
12. Write a note on the following:
(a) Gray Code.
(b) Alphanumeric codes.
13. Explain about register transfer.
14. Explain about shift micro operations.
15. Explain about the phases of an instruction cycle.
16. Explain any 5 memory reference instructions.
17. What is an assembler? discuss about the representation of symbolic program in memory.
18. Explain the various organization and operations on a stack.

Part – C (3 * five = 45)
ans All ques..

19. (a) Explain the following:
(i) Decimal fixed point representation (8)
(ii) Error detection codes. (7)
Or
(b) Write a note on the subsequent.
(i) Three state bus buffers. (7)
(ii) Arithmetic logic shift unit. (8)
20. (a) Explain in detail about computer registers.
Or
(b) Write a note on subroutines.
21. (a) Explain in detail about general register organization.
Or
(b) Write a note on instruction formats.

Earning:   Approval pending.