LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – COMPUTER SC.
SECOND SEMESTER – APRIL 2012
CS 2811 – OPERATING SYSTEMS
Date : 17-04-2012 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A
ANSWER ALL THE QUESTIONS: 10 X 2 = 20
- What are the two communication models in process control?
- Define the term ‘DLM’.
- List out the different types of queues in process scheduling.
- Define: Through put.
- What is Entry section?
- Define Deadlock.
- What is Page fault?
- What is the usage of limit register?
- Define Relative Block number.
- What is Disk band width?
PART – B
ANSWER ALLTHE QUESTIONS : 5 X 8 = 40
11. a) Write a brief note on Distributed systems.
(OR)
- b) How the system programs are categorized? Explain its functionalities.
- a) Write a note on FCFS scheduling algorithm.
(OR)
- b) Explain about the Real time scheduling.
- a) Briefly discuss about the Deadlock characterization.
(OR)
- b) Explain the Reader-Writers problem.
- a) How physical address is generated using Hash table? Explain.
(OR)
- b) Briefly discuss about Segmentation with diagram.
- a) Write a note on file attributes and file operations.
(OR)
- b) Explain Scan and C-scan disk scheduling methods with examples.
PART – C
ANSWER ANY TWO: 2 X 20 = 40
- a) Discuss the System calls and its categories in detail.(10)
- b) Explain the SJF and RR scheduling methods in detail.(10)
- a) Explain the Deadlock prevention method in detail.(10)
- b) Give the detail note on Demand paging and page replacement with diagram.(10)
- a) Discuss the Directory structures with neat diagram.(10)
- b) Write a note on the following (i) Multi processor Systems.(5)
(ii) Clustered System.(5)