D 90138
D 90138
FIFTH SEMESTER B.A/B.SC. DEGREE EXAMINATION, NOVEMBER 2020
(CUCBCSS-UG)
Computer Science
BCS 5B 07-COMPUTER ORGANIZATION AND ARCHITECTURE
(2017 Admissions)
Time: Three Hours Maximum 80 Marks
Section A
Answer all questions.
Each question carries 1 mark.
1. Give the logic diagram of OR gate using NAND gate.
2. List the universal gates?
3. Which type of flip-flops are used for implementing Johnson's counter?
4. What does the ring counter do?
5. What is an accumulator ?
6. What is address sequencing?
7. What is micro program?
8. What is an interrupt?
9. What is virtual memory?
10. What are I/O controllers?
(10x1 = 10 marks)
Section B
Answer at least four questions. All questions can be attended.
Each question carries 4 marks.
Overall ceiling 16.
11. Give the logic diagram and truth table of XOR gate.
12. What is a latch? How it differs from flip-flop?
13. What is instruction cycle? Explain.
14. What do you mean by mapping of instruction? Explain
15. Explain priority interrupt.
(4 x 4 = 16 marks)
Section C
Answer at least four questions. Each question carries 7 marks.
All questions can be attended.
Overall ceiling 28.
16. Describe the functions of encoders with example.
17. What do you mean by modulus of counter? Explain.
18. What are Demultiplexers? Explain its purpose.
19. What do you mean by serial shifting? Explain.
20. Give a brief account on stored program organization.
21. Explain the differences between hardwired control and micro programmed control.
22. Give an outline on general register organization.
23. What is DMA? Explain how it is organized.
(4 x 7 = 28 marks)
Section D
Answer any two questions.
Each question carries 13 marks.
24. Explain 3-to-8-line decoder in brief with necessary logic diagram.
25. What is a flip-flop? Show the logic for implementing R-S flip-flop having active-High R
and S inputs. Draw its truth table and mark the invalid entry.
26. What is an instruction cycle? Explain the different steps in instruction cycle.
27. Explain different types of addressing modes with illustration.
28. Explain the organization of associative memory.
(2 x 13 = 26 marks)
നിങ്ങൾക്ക് ഉപകാരപ്പെട്ടെങ്കിൽ നിങ്ങളുടെ കൂട്ടുകാർക്ക് കൂടി ഷെയർ ചെയ്യുക
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