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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
M.C.A.DEGREE EXAMINATION COMPUTER APPLICATIONS
SECONDSEMESTER APRIL 2018
16PCA2MC04- COMPUTER ARCHITECTURE AND MICROPROCESSOR
Date: 23-04-2018 Dept. No. Max. 100 Marks
Time: 09:00-12:00
PART A
Answer ALL questions 10 x 2 20
1. Convert the following
i. (98.625)10 )H.
ii. (45.5)8
2. State DeMorgan's law. Give its logic circuit.
3. What are multiplexers? State the use of selection lines of multiplexers.
4. State the features of flipflop.
5. What are the types of address? Give example.
6. Mention the features of RISC.
7. Define microprocessor. Mention any two of its applications.
8. State the use of the pins READY and TEST.
9. What are the uses of CALL and RET instructions?
10. Differeniatet MACRO and PROCEDURE.
PART
Answer ALL questions 5 x 8 40
11. a. Write short note on binary codes.

11. b. Write short note on the following
i. complement and complement.
ii. Error detection with odd parity.
12. a. Explain full adder with neat diagram. Give its truth table.

12. b. Explain the operation of clocked RS flip flop. Give its truth table.
13. a. Elucidate the different addressing modes with example.

13. b. Illustrate the microoperations of memory reference instructions.
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14. a. Explain the block diagram of a micro computer.

14. b. Write short note on program development tools.
15. a. Explain shift and rotate instructions with example.

15. b. Illustrate MACRO with an example.
PART C
Answer any TWO questions 2x20 40
16.a.Simplify the following using tabulation method
Σ
16. b. Explain in detail 4 bit register with parallel load.
17. a. Explain the addition and subtraction operations using a flow chart.
17. b. Explain the different registers of 8086.
18. a. Explain any 10 assembler directives. Give example.
18. b. Explain the program development steps.