Operating System MSC IT term 3rd Past Paper 2014 UOS

University of Sargodha
M. Sc. I. T, 3rd Term Exam 2014
Subject: Information Technology
Paper: Operating System (CMP: 620)
Time Allowed: 2:30 Hour
Session: 2012-14
Maximum Marks: 80

Objective Part

Q.1. Write short answers of the following in 2-3 lines each on your answer sheet. (2*16)

i. What is system call to create child process?
ii. Process Control Block
iii. Thread Control Block
iv. Define demand paging.
v. Virtual machine
vi. Define file system
vii. Kernel
viii. List four conditions for deadlock.
ix. What is semaphore? What is its use?
x. What are the various types of fragmentation?
xi. Define Starvation
xii. Mutual exclusion
xiii. Multi-threading
xiv. Context Switching
xv. Time Sharing Systems
xvi. Explain the terms: Waiting time, Turnaround time.

Subjective Part

Q.2.
(a) List and discuss various services provided by the operating system. (8)
(b) Compare batch operating systems and time sharing operating systems. (4)

Q.3. Explain segmentation and paging. Compare both with advantages and disadvantages. (12)

Q.4. Explain the virtual memory. Write the advantages and disadvantages. (12)

Q.5. What is Banker’s Algorithm of Deadlock Avoidance? Explain. (12)

Q.6. Discuss the critical section problem. Solve the dining philosopher’s problem. (12)

Q.7. Discuss the file allocation methods. (12)