2012 A.M.I.E.T.E Computer Science & Engineering Fifth semester b.tech.(engineering) degree examination october 2012. it/cs 09 504 operating system (2009 scheme) calicut university. Question paper

FIFTH SEMESTER B.TECH.(ENGINEERING) DEGREE EXAMINATION OCTOBER 2012.
IT/CS 09 504 OPERATING SYSTEM
(2009 SCHEME)
Time: 3 Hours.
Maximum :70 Marks
Part A
Answer all the quistions


1. What is kernel?
2. What are batch systems ?
3. Define CPU scheduling.
4. Define secondary memory.
5. List any four type of file.
(5 x 2 = 10 mark)
Part B
Answer any four questions.

6. Explain OS functions and implementations.
7. Explain device management in OS ?
8. Explain various classic problem on synchornization.
9. Write about any two CPU scheduling algorithms.
10. What is demand paging and pure demand paging ?
11. Explain various layers of a file system.
(4 x 5 = 20 mark)
Part C
Answer all the questions.
12.
(a) Explain how protection is provided for hardware resources by the operating system.
Or
(b) What are the various process scheduling algorithm ?
13.
(a) Explain what semaphores are,their usage implimentaion given to avoid busy waiting and binary semaphores.
Or
(b) Give detailed description about deadlocks and its characterization.Explain about the methods used to prevent deadlocks.

14.
(a) Explain about contiguous memory allocation.
Or
(b) Explain various page replacement stratagies.

15.
(a) Explain file system implementation.
Or
(b) Explain various directory structures.
(4 x 10=40 marks)