UNIV4VINU | ENGINEERING ACHIEVERS

B.E./B.Tech. DEGREE EXAMINATION,

Fourth Semester

Information Technology

IF 253 — OPERATING SYSTEMS

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 ? 2 = 20 marks)

1. Mention the sequence of steps involved in the execution of an assembly language

programming.

2. Distinguish the function performed by Loader and Linker.

3. List out the important features of third generation operating systems.

4. Show the layered structure of the operating system.

5. Define the degree of multi programming.

6. What is thrashing?

7. What are the essential requirements for longterm information storage?

8. Suggest the solutions for bad block problem in File systems.

9. State the conditions to avoid race conditions.

10. What is starvation?

PART B — (5 ? 16 = 80 marks)

11. Discuss in detail the four strategies which are used for dealing with

deadlocks. (16)

12. (a) Describe in detail the system softwares used in a Microprocessor

system. (16)

Or

(b) Explain the concepts of Multiprogramming, Multiprocessing, Time sharing and

Real Time Operating systems. (16)

13. (a) (i) Explain the concept of multiprogramming with variable

partitions. (8)

(ii) Describe the memory management with the Buddy System. (8)

Or

(b) (i) Explain the type of fragmentation present in paging and

segmentation systems. (8)

(ii) Explain the principle of the following page replacement