LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE
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FIFTH SEMESTER – November 2008
CS 5501 – OPERATING SYSTEM
Date : 03-11-08 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART A (10×2=20 marks)
Answer ALL Questions
- Define Process
- What are the functions of an Operating System?
- Explain the need for Compaction.
- What is thrashing?
- State the steps performed in P(S) operation with respect to semaphores
- What is CPU headway?
- What is blocking with respect to file systems?
- Explain Dedicated devices.
- What are the functions of the I/O Scheduler?
- What is access control?
PART B (5×8=40 marks)
Answer ALL Questions
- a) Explain the different states of a process and their transitions.
(OR)
b) Explain the different types of Interrupts. - a) Define Deadlock. Explain in brief, how to prevent deadlock?
(OR)
b) Compare any two scheduling algorithms with an example - a) What is a page fault? How it is handled by Operating System?
(OR)
b) Compare any two page replacement algorithms
- a) Explain SPOOLING
(OR)
b) Explain management of Channels with respect to I/O devices
- a) Explain the hierarchical organization of file systems
(OR)
b) Explain the System calls related to Directory systems.
PART C (2×20=40 marks)
Answer any TWO Questions
- a) Explain Partitioned allocation with respect to memory.
b) Explain any two Page Replacement algorithms. - a) Explain Process Synchronization mechanisms.
b) What is deadly embrace? How can it be resolved? - a) Explain any two techniques of device management.
b) What are the different methods of File organization
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