Himachal Pradesh University (HPU) 2008 B.Tech - exam paper

(2058)
5669
B.Tech sixth Semester exam
Operating System (ECE)
Paper-EC-6005
Time Allowed: three Hours Maximum Marks: 100
Note: Attempt five ques. in all, by selecting at lowest one ques. from every of part A , B, C, D and entire section-E.
Section-A
1. a) The different kind of system calls.
b) Shortest job 1st scheduling & priority scheduling.
[20]
2. Explain batch processing system, multiprogramming system & time sharing system. explain their relative advantages & disadvantages.
[20]
Section-B
3. Explain:
a) Method of deadlock prevention.
b) Note on security.
[20]
4. Explain:
a) Aim of protection.
b) Access matrix way of protecting the resources.
[20]
Section-C
5. Explain:
a) Paging & segmentation with relative advantages & disadvantages.
b) different disk scheduling policies.
[20]
6. Explain:
a) Threshing & its consequences.
b) different page placement algorithm. [20]

Section-D
7. What r attributes of a file? What rs the different operation that can be perform on a file. Also explain access method. [20]
8. Consider the system that support the strategies of continguous linked & index allocation. What criteria should be used in deciding which strategy is best utilized for a particular file? [20]
Section-E
9. Explain:
a. Difference ranging from system call & library routine.
b. Term “fragmentation”.
c. System threads.
d. Types of files.
e. What is logical address?
f. Swap space management.
g. Parallel versus distributed system.
h. Real time operating system.
i. Concept of virtual machine.
j. What is directory file? [2*10]

Earning:   Approval pending.