University of Delhi 2010-4th Sem M.C.A 2nd yr OPERATING SYSTEM CASE STUDIES UNIVERSITY - Question Paper
This question paper contains 2 printed pages.
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6140 Your Roii No.............................
MCA / IV Sem.
J
CS - 405 - OPERATING SYSTEM : CASE STUDIES
(Admissions of 2007 & onwards)
Time 3 hours Maximum Marks 60
(Write your Roll No on the top immediately on receipt of this question paper)
Attempt all questions.
Part of a question must be answered together.
1. a) How does UNIX assign a disk inode to a newly created file 7 05
b) Compare open ( ) and dup ( ) system calls w.r.t. file system in UNIX 02
c) Distinguish between named and un-named pipes in UNIX 03
2 a) Describe main kernel data structures that describe a
state of a process. 05
b) Describe static and dynamic components of context of
a process 04
4 a) What is purpose of fork ( ) and exec ( ) system
calls9 02
b) List sequence of operations performed by kernel for fork( ) system call 03
c) What is the advantage of having separate regions for text and data 9 02
5 Compare swapping with demand paging. Explain four major data structures to support low-level memory
06
6 a) How can processes exercise crude control of their
scheduling pnority ? 04
b) How does kernel handle signals in context of a process that receives them ? 05
c) Discuss an algorithm to duplicate region of a process. Give an example of system call using it. 04
7 a) What is the purpose of system calls and how do system
calls relate to O S and to concept of dual mode (kernel & user) operation. 03
b) Give flow for UNDC system booting and initialization
03
c) How is file .[given a path name], opened by a process ?
Take eg; /etc/passwd 03
100
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