Operating System and Administration - Jun 2015

Computer Engineering (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.

Answer any one question from Q1 and Q2

1 (a) Draw and explain high level architecture of UNIX systems.(6 marks) 1 (b) Write a short note on interrupts and exceptions.(4 marks) 1 (c) Explain batch processing and multiprogramming.(2 marks) 2 (a) Explain 4 state process diagram.(6 marks) 2 (b) What do you mean by user and hardware perspective of operating system?(4 marks) 2 (c) List any two functions of an OS.(2 marks)

Answer any one question from Q3 and Q4

3 (a) Explain organization of the file hierarchy tree.(6 marks) 3 (b) Explain types of files in UNIX.(3 marks) 3 (c) Explain input, output and error redirection.(3 marks) 4 (a) Explain the entire process of booting (system turn on to login prompt).(6 marks) 4 (b) Differentiate between grub and LILO.(4 marks) 4 (c) Define a shell.(2 marks)

Answer any one question from Q5 and Q6

5 (a) Which two signals can never be ignored?(2 marks) 5 (b) Explain signal and kill function with parameters.(4 marks) 5 (c) What are real effective and save ids.(3 marks) 5 (d) Differentiate between nice and renice (with examples).(4 marks) 6 (a) Differentiate between user mode and kernel mode instructions.(4 marks) 6 (b) How does a user level process change to kernel mode ? Explain.(2 marks) 6 (c) Explain how kill function can be used to send signal to a group of processes also give the syntax of kill function.(4 marks) 6 (d) What is the shadow password file ? Where does user password reside in UNIX.(3 marks)

Answer any one question from Q7 and Q8

7 (a) Write a short note on RAID and its levels.(6 marks) 7 (b) Explain the process of mounting and unmounting a pendrive.(4 marks) 7 (c) Explain the fields in /etc/group file.(3 marks) 8 (a) What is meant by disk partitioning and disk formatting.(4 marks) 8 (b) What is the native file of Linux and UNIX. Differentiate between UNIX and Linux.(4 marks) 8 (c) What are the startup files ? What are its tasks?(3 marks) 8 (d) How to set the password for user account in Linux/UNIX.(2 marks)