Jawaharlal Nehru Technological University Kakinada 2010-2nd Sem M.C.A Subject Code: MC205 [NR] Supplementary s OPERATING SYSTEMS - Question Paper

Time: three Hours

Max Marks: 60


ans any 5 ques. All ques. carry EQUAL marks



1. a) What is an operating system and discuss various kinds of operating system.

b) elaborate the services offered by the operating system?

2. a) What is a process Control Block? What is the info it contains?

b) discuss about the various scheduling algorithms with examples.
3. discuss about the following:
a) Semaphores
b) Critical Region
4. a What is a deadlock? How deadlock issue can be handled?
b) discuss about Deadlock Prevention.
5. a) define the swapping policy of an OS.
b) What is paging? define page replacement approach in an OS.



6. a) explain LRU-Approximation page Replacement.
b) Consider LRU, FIFO, Optimal page replacement algorithms. Rank these algorithms
from bad to perfect according to their page fault rate. Separate those algorithms which
suffer from Belady's anomaly from those which do not.



7. discuss different techniques implemented for free space management, explain with
Suitable examples.

8. a) provide the classification of intruders. discuss every class.

b) Write a brief note on intrusion detection.

Earning:   Approval pending.