Andhra University
MCA - 1102 (2015/I/02)

MCA Degree Examination
First Year - First Semester

COMPUTER ORGANIZATION
(Effective from the admitted batch of 2000-2001)

Time: Three hours
Maximum: 75 marks

Answer Question 1 and any four questions.
Answer each question at one place.
All questions carry equal marks.

1.
a. Define the terms machine cycle, instruction cycle and micro-program?

b. What are the various schemes used for data transfer between Processor and Input and Output devices?

c. Explain with example floating point representations?

d. Explain about combinational and sequential circuits?

e. Write about shift registers and binary counters.

2.
a. What is Cache memory? How replacement algorithms are useful to transfer data in Cache memory?

b. Compare CISC and RISC processors?

3.
a. Compare interrupt I/O control with DMA I/O?

b. Write about DMA Transfer?

4.
a. Compare and contrast characteristics features of different memories.

b. What are the advantages you got with virtual memory?

5.
a. Compare the features of micro-programmed control unit with hard wired control unit.

b. Explain about control memory and address sequencing?

6.
a. Discuss clearly the general register organization of a typical CPU?

b. What is an interrupt? How they are serviced by CPU?

7.
a. Discuss various addressing modes in a computer with examples?

b. Evaluate X = (A+B) - (C+D) with different addressing modes?

8. Write short notes on the following:
a. Gates

b. Multiplexers

c. Various Complements