B.Sc. (Entire Computer Science) II (Semester IV) (CBCS)
Examination, 2018
Paper III linux operating system
Day and Date Monday, 10-12-2018 Total Marks 70
Time 10.30 a.m. to 1.00 p.m.
Instructions All questions are compulsory.
A figures to the right indicate full marks.
1. Choose correct alternative. 14
Which of the following is not the shell keyword
waitfor umask case until
The information of files is stored in on the disk.
Swap table Boot table
Inode table System table
For taking input from the user in shell script command
is used.
echo read
Both A and B None of these
Which of the following is the use of mv command
Rename a file
Move group of files into another directory
Both A and B
None of these
Which command is used to extract a column from a text file
paste get cut tar
Every process running on the system has a
Permissions Process ID
Both A and B None of these
The command bar is used to reduce the size of a file.
True False
In vi editor dw command is used to delete a single word.
True False
Wild character is used for matching character.
one or more zero or more
one None of these
10) Which of the following system variable is used to display list of all shell
arguments


11) What is the purpose of operator
Used to send the output of one command becomes the input of a second
command
Used to send both input and output to the same file
Used to overwrite the contents of a file
Used to append data to a file without overwriting it
12) Which of the following is the functionalities of shell
Authenticates user
Interprets commands
Allocates time and memory to programs
Controlling the hardware
13) The location for subdirectories for local programs and executables for user
and administrative commands is in directories.
/temp /mnt /opt /usr
14) The command "mkdir" cannot take multiple arguments.
True False
2. Answer any seven of the following 14
What is the use of sed command
Write a use of expr for performing arithmetic operations.
Differentiate between hard link and soft link.
Write a use talk command.
What is a premature termination of process
What is the concept of LILO
Differentiate between output redirection operator and
What is the purpose of super block
List the advantages of background jobs.
3. Answer any two of the following 10
Explain differences between Linux and Windows Operating
System.
Write a shell script to check the given number is prime or not.
Explain the following commands.
lpr ii) cut iii) uniq
Explain file Archive command with suitable example. 4
4. Answer any two of the following 14
What are file permissions How to change file permissions Explain with
suitable examples
What is Vi editor Explain the Exit modes of Vi editor.
Explain Security Enhanced Linux.
5. Answer any two of the following 14
How grep command works Explain its option with suitable examples.
Write a menu driven shell script.
To change the ownership of a file.
To compare two files.
To rename the file "First. txt" to "second. txt".
To remove a directory.
To kill a process with its given ID.
Describe architecture of Linux system.