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FIFTH SEMESTER B.Sc. DEGREE EXAMINATION, NOVEMBER 2019
{CUCBCSS—UG) ۱
Computer Science
BCS 5B 07—COMPUTER ORGANISATION AND ARCHITECTURE
(2017 Admissions)
Time : Three Hours Maximum : 80 Marks
Part A

Answer all questions.
Each question carries 1 mark.

1. Draw the logic diagram of AND gate using NOR gate.
2. Give the truth table of X-NOR gate.
3. What is T flip-flop ?
4. What is the MOD of Johnson’s counter if it uses n flip-flops ?
5. What is an operation code ?
6. What is CAS ?

7. What do you mean by micro-operation ?

8. What is DMA?

9. What is cache memory ?
10. Define polling.

(10 x 1 = 10 marks)
Part B

Answer all questions.
8 Each question carries 3 marks.
11. What are universal gates ?
12. Explain the differences between edge triggering and pulse triggering circuits.

13. What do you mean by address sequencing ? Explain.

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