Punjab Technical University 2009-4th Sem M.C.A (th) (Re-appear) OPERATING SYSTEM SUBJECT CODE : MC - 404 (N2) - - Question Paper

Roll No.
Total No. of Questions: [09] [Total No. of Pages: 02]

MCA (Sem- 4th)
OPERATING SYSTEM
SUBJECT CODE : MC - 404 (N2)
" Paper ID : [B0118l
[Note: Please fill subject code and paper ID on OMR]

Time : 03 Hours Maximum Marks : 60
Instruction to Candidates:
1) Attempt any 1 ques. from every parts A, B, C, and D.
2) part - E is Compulsory.
3) Use of Non-programmable Scientific Calculator is allowed.

Section - A (1x10=10)

Ql) What is an operating system? discuss the structure of an operating system.
Q2) (a) explain different scheduling algorithms.
(b) How can operating system create an illusion of multiprocessing?

Section - B (1x10=10)

Q3) (a) explain the effect of heavily multi-prograrnming on demand-page
swapping.
(b) discuss the user's view of memory under memory paging techniques.
Q4) (a) Compare the advantages and disadvantages of segmentation and paging.
(b) Memory swapping improves the system performance"? Justiffy the
statement.

Section - C (1x10=10)

Q5) (a) explain the different functions of File System.
(b) elaborate the 3 various modes of file sharing?
Q6) What is scheduling?Discuss the different kinds of scheduling.

Section - D(1x10=10)

Q7) explain the deadlock strategies and pre-Requisites..
Q8) (a) explain the different program threats"
(b) What is encryption?

Section - E (10x2=20)
Q9)
a) What is the purpose of situation switching?
b) Differentiate ranging from a process and a thread.
c) elaborate the 3 basic functions of a computer hardware clock and timer?
d) describe thrashing
e) What does Belady' anomaly indicate?
f) What is asynchronous I/O ?
g) What is file space allocation?
h) How memory paging is various from memory Segmentation?
i) describe phasing.
j) How is directory various from a file?

Earning:   Approval pending.