NIELIT Question Paper : A Level Course Basics of OS, Unix & Shell Programming
Name of the Institute : National Institute of Electronics and Information Technology (nielit.gov.in)
Name of the Course : A Level Course
Subject Code/Name : A8R4/Basics of OS, Unix & Shell Programming
Document Type : Old Question Paper
Location : India
Website : nielit.gov.in
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NIELIT Shell Programming Sample Paper
A8-R4:
Part – One
(Answer all the questions)
1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “tear-off” answer sheet attached to the question paper, following instructions therein. (1×10)
Related : NIELIT Question Paper A Level Course Introduction to Database Management System : www.pdfquestion.in/7080.html
1.1 What operating system was Linux designed to “resemble somewhat”?
A) Minix
B) Windows
C) System V
D) Vunix
1.2 Which of the following is not a Linux boot loader?
A) Lilo
B) Syslinux
C) Grub
D) None of the above
1.3 External applications called ________ provide policy for the visual appearance.
A) Tiling Window Manager
B) Compositing Window Manager
C) X Window System
D) X Window Manager
1.4 DOS was the first widely-installed operating system for personal computers. What does DOS stand for?
A) Digital Operating System
B) Disk Operating System
C) Desktop Operating System
D) It is an abbreviation of the word “doors”.
1.5 ________ runs on computer hardware and serve as platform for other software to run on
A) Operating system
B) Application Software
C) System Software
D) All of the above
A8-R4 Page 2 of 5 January, 2012
1.6 When looking at the /etc/passwd file, you notice that all the password fields contain ‘x’. What does this mean?
A) That the password is encrypted.
B) That you are using shadow password file.
C) That all passwords are blank.
D) That all passwords have expired.
1.7 Which of the following command would you use to cleanly restart a Linux machine?
A) init 5
B) init 6
C) init 0
D) shutdown –h
1.8 After the kernel is loaded, it calls the ________ daemon which is responsible for creating new processes.
A) inittab
B) sys.conf
C) init
D) syslog
1.9 You want to know how much space is being occupied by your user’s home directories. Which
of the following will provide you with this information?
A) du -l /home
B) du -b /home
C) du -m /home
D) du -c /home
1.10 Using command substitution, how would you display the value of the present working directory?
A) echo $(pwd)
B) echo pwd
C) $pwd
D) pwd | echo
A8-R4 Page 3 of 5 January, 2012
2. Each statement below is either TRUE or FALSE. Choose the most appropriate one and ENTER in the “tear-off” sheet attached to the question paper, following instructions therein. (1×10)
2.1 Linux is a multitasking Operating System.
2.2 In Unix, ctrl-z will suspend a job and put it in the background.
2.3 Relative pathnames begin with a slash.
2.4 While copying a file if the destination does not exist, the copy is renamed.
2.5 Users can read, write or execute each others’ files without permission.
2.6 echo $SHELL will display the name of your shell.
2.7 Server address cannot be specified by DHCP.
2.8 Unix filenames are case sensitive.
2.9 Scheduling priority does not determine access to the CPU.
2.10 Aliases let you create shortcuts to commands.
Part – Two
(Answer any FOUR questions)
5. a) Describe in detail the boot process of any Linux system.
b) How does the inode map to data block of a file?
c) What is a page fault and when does it occur? (5+6+4)
6. a) Explain /etc/shadow file used under Linux or UNIX?
b) Describe how would you find files in Linux using ‘find’ command.
c) How would you use head and tail in a pipeline to display lines 25 through 75 of a file?
d) Give a brief overview of “The X Window System Architecture”. (5+3+3+4)
7. a) Write shell script to convert file names from UPPERCASE to lowercase file names or vice versa.
b) What does the command “$who | sort –logfile > newfile” do?
c) What are some of the improvements of Vim over Vi?
d) What is the difference between a ‘thread’ and a ‘process’? (6+3+3+3)
8. a) Explain how would you schedule a task using cron? Also explain the format of cron table.
b) Explain kill() and its possible return values.
c) What is DHCP? How to exclude an ip address in DHCP? Give an example. (6+5+4)
9. a) List any five system calls used for process management.
b) How can files be Archived and Compressed in Linux?
c) Explain the steps that a shell follows while processing a command.(5+5+5)
You may also provide an answer key..