D 70225
D 70225
FIFTH SEMESTER B.Sc. DEGREE EXAMINATION, NOVEMBER 2019
(CUCBCSS-UG)
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.
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.
14. Define interrupt cycle.
15. Explain hit/miss ratio.
(5 x 3 = 15 marks)
Part C
Answer any five questions.
Each question carries 5 marks.
16. What is flip-flop? Explain how will you convert a JK flip-flop to a D flip-flop.
17. Explain the design of full adder circuit with logic diagram and truth table.
18. What is Demultiplexer ? Design a 1-to-4 Demultiplexer circuit.
19. Explain the Serial-In-Serial-Out shift register.
20. Give the circuit representation of 4-bit synchronous counter and explain its function.
21. What is an addressing format? Explain the differences between direct addressing mode and indirect addressing mode.
22. Write a note on virtual memory.
23. Give an account on synchronous data transfer mode.
(5 x 5 = 25 marks)
Part D
Answer any three questions.
Each question carries 10 marks.
24. Explain how a full adder circuit can be converted to a full subtractor with the addition of one inverter circuit.
25. Explain the Master-Slave Flip-Flop. How does it overcome the race condition of J-K flip-Flop?
26. Explain the different types instructions with examples.
27. Explain the function and organization of microprogrammed control unit.
28. Explain the different types of Auxiliary memories.
(3 x 10 = 30 marks)
നിങ്ങൾക്ക് ഉപകാരപ്പെട്ടെങ്കിൽ നിങ്ങളുടെ കൂട്ടുകാർക്ക് കൂടി ഷെയർ ചെയ്യുക
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