Jawaharlal Nehru Technological University Kakinada 2010 B.Tech Information Technology Operating systems ii iisemester ro7 regular - Question Paper

OPERATING SYSTEMS SET NO:1

II B.TECH II SEMESTER (R07) REGULAR exams APRIL-2010 Max Marks:80

ans ANY 5 ques.
ALL ques. CARRY EQUAL MARKS

1.a)What is an operating system? discuss the structure of an Operating system.
b)Explain different kinds of system calls

2.a)Explain deterministic modeling for scheduling algorithm valuation.
b)Explain the Non-preemptive and preemptive SJF scheduling algorithm with an example.

3 a)Explain the locking protocol for concurrency control
b)Explain the synchronization in Linux operating system.

4 a)Explain memory swapping mechanism
b)Explain the difference ranging from internal fragmentation and external fragmentation.
c)What is Thrashing? discuss the causes of thrashing.

5. a)Explain the necessary conditions for deadlock
b)Explain the deadlock avoidance

6. a)Explain the file access methods
b)Explain acyclic graph directories

7. a)Explain swap-space management with an example.
b)Describe stable storage implementation.

8. a)Explain program Threats.
b)Explain the windows xp security model.

Earning:   Approval pending.