Operating System and Administration - Dec 2015

Computer Engg (Semester 3)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.

Solve any one question from Q1 and Q2

1 (a) Explain the characteristics of Unix file system as well as Processing Environment.(6 marks) 1 (b) State difference between system call, libraries and header file.(6 marks) 2 (a) What is bootstrapping? Explain boot process steps in detail.(6 marks) 2 (b) Explain all the steps involved in adding a new user without using adduser command.(6 marks)

Solve any one question from Q3 and Q4

3 (a) What is an i-node in UNIX system? Explain i-node structure of a file including:
i) Direct Block Pointers
ii) Indirect Block Pointers
iii) Double Indirect Block Pointers
iv) Triple Indirect Block Pointers.(6 marks) 3 (b) What is process? Explain process transition diagram. State different reason of process swap out while in running state.(6 marks) 4 (a) Explain the term context switch with respect to Kernel process is non-preemptive.(6 marks) 4 (b) Write short notes on:
i) Bash Scripting
ii) Perl Scripting
iii) Python Scripting.(6 marks)

Solve any one question from Q5 and Q6

5 (a) Explain final outcome of the commands given below (use suitable example):
i) umask a-x
ii) ps -elf|grep chrome>abc.txt
iii) fdisk-1.(6 marks) 5 (b) Explain Modern access control Vs. Real word access control.(7 marks) 6 (a) Explain the analogies related to process given below:
i) Orphan
ii) Zombie
iii) Daemon.(6 marks) 6 (b) What is Sticky a Bit? Explain importance of a sticky bit using appropriate symbolic example. How to check if a folder is set with Sticky Bit or not?(7 marks)

Solve any one question from Q7 and Q8

7 (a) State difference between SATA and PATA.(4 marks) 7 (b) With neatly labelled diagram explain RAID.(5 marks) 7 (c) Write a short note on Crontab scheduling.(4 marks)

Answer the following:

8 (a) Explain all the attributes of /etc/group file.(4 marks) 8 (b) Compare and contrast the Ext2, Ext3, Ext4 family.(5 marks) 8 (c) What are different partitions in Unix? Explain.(4 marks)