LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.C.A. DEGREE EXAMINATION – COMPUTER APPLICATIONS
SECOND SEMESTER – APRIL 2008
CA 2501 - COMPUTER ORGANIZATION AND ARCHITECTURE
Date : 23/04/2008
Time : 1:00 - 4:00
Dept. No.
PART –A
DC 3
Max. : 100 Marks
10 x 2 = 20
Answer ALL questions
1. List out the Truth table of EXCLUSIVE –OR Gate
2. Draw the two graphic symbols of NOR Gate.
3. What are Don’t Care Conditions?
4. Define a decoder
5. What is a register?
6. What is a Grey Code? Give Examples
7. Convert the Hexadecimal F3A7C2 to Binary & Octal
8. What do you mean by Flag Bits?
9. What are the three types of CPU organization?
10. Define Supervisor Mode.
PART-B
Answer any FIVE questions
11. Explain FULL ADDER with a neat circuit diagram
(Or)
Explain any TWO Flip-Flops with the excitation tables.
5 x 8 = 40
12. Discuss the following
a) Multiplexers
(OR)
b) Bidirectional shift registers with parallel load
13. Write short notes on
a) Memory reference instructions
(OR)
b) Program Interrupt
14. Explain about the design of accumulator logic.
(OR)
Explain about the design of a basic computer.
15. Discuss in detail about Types of Interrupts
(OR)
Discuss about Register Stack Organization
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PART-C
2 x 20 = 40
Answer any TWO questions
16. Simplify the Following Boolean Function in Sum of products Form by means of four variable
map .Draw the logic diagram with
a)AND-OR GATES b)NOR GATES
F(A,B,C,D)=E(0,2,8,9,10,11,14,15)
17. a) Explain briefly about registers with parallel load.
(OR)
b) Explain with a neat flow chart about the Interrupt cycle.
18. a) Illustrate with an example about the different addressing modes.
b) Compare the following type of instructions with example.
i) Three address instruction
ii) Two address instruction
iii) One address instruction
iv) Zero address instruction
v) RISC instruction
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