Punjab Technical University 2006-3rd Sem B.Sc Information Technology -IT OPERATING SYSTEMS - Question Paper

1159
Paper BSI -302
OPERATING SYSTEMS
Bsc (IT) third Semester (2096)

Time: 3 Hours Max Marks:75

Note: The ques. paper consists of 2 parts A and B
9) Attempt all ques. from Part A
10) Attempt any 9 ques. from Part B.


Part A
1.
i. What is multiprogramming?
ii. Write any 2 main functions of an operating system?
iii. What is spooling?
iv. What is a deadcode?
v. What are process supervisor calls?
vi. What is difference ranging from a physical address and a virtual address?
vii. Explain the term segmentation.
viii. What do you mean by page locking?
ix. Explain the concept of file locking?
x. What is a root directory?
xi. What is a memory-maped I/O?
xii. Explain the concept of polling.
xiii. Explain the concept of RAM disks.
xiv. How is a worm various from a virus?
xv. What are acess control list?

(15x2=30)

Part B
2. What is the difference ranging from kernel mode and user mode? discuss.
3. List a few differences ranging from personal computer operating systems and mainframe operating systems.
4. What are the 3 main states that a process can be in? define the meaning of every 1 briefly.
5. Discuss Dekker’s algorithm for mutual exclusion.
6. Explain the difference ranging from internal fragmentation and external fragmentation.
7. Explain the concept of demand paging with the help of suitable example.
8. What are directories? explain different operations that can be performed on directories.
9. What do you mean by File structure? Also explain different file kinds.
10. Explain the concept of RAID and various levels of RAID.
11. Write a short note on deadlock prevention.
12. What is difference ranging from buffering and caching? discuss
13. Explain the different methods for user authentication.

(9x5=45)

Earning:   Approval pending.