Jawaharlal Nehru University (JNU) 2007 B.Tech Electronics and Communications Engineering OS: Operating System - Question Paper

Time: three hours Max Marks: 80 ans any 5 ques. All ques. carry equal marks

1. With the help of neat block diagram, define the computer components with an example. [16]

2. (a) discuss the reasons for process terminations. (b) define the single blocked queue and multiple blocked queues with an exam[4+12]

3. discuss the different mechanisms given by UNIX for inter process communication and synchronization in detail. [16]

4. How the deadlocks can be avoided? discuss with the help of necessary algorithms. [8+8]

5. (a) Enumerate the reasons for allowing 2 or more processes to, all have access to particular region of memory. (b) In a fixed partitioning scheme, elaborate the advantages of using unequal size partitions? (c) What is the difference ranging from internal and external fragmentation? (d) elaborate the distinctions among logical, relative and physical addresses? [4+4+4+4]

6. (a) explain about different criteria used for short-term scheduling. (b) explain about fair share scheduling method.

7. (a) What do you understand by a ?le directory? (b) discuss brie?y the info elements of a ?le directory. (c) discuss what is tree-structured directory?

8. Write notes on: (a) intrusion detection (b) password protection.

Earning:   Approval pending.