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Posted Date: 24 Oct 2008 Posted By: vindhya Member Level: Diamond
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2008 Jawaharlal Nehru Technological University Information Technology III B.Tech Semester Supplimentary Examinations, Aug/Sep 2008,UNIX PROGRAMMING Question paper
Code No: R05320503 Set No. 2
III B.Tech Semester Supplimentary Examinations, Aug/Sep 2008
UNIX PROGRAMMING
( Common to Computer Science & Engineering and Information Technology
)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Explain basic file attributes. Discuss the appropriate commands associated with
these attributes. [16]
2. Which is the command used for ordering a file? Discuss all the options available
for this command. For every option explain with an example. [16]
3. (a) While executing a shell script either the LOGNAME or the UID is supplied at
the command prompt. Write a shell script to find out at how many terminals
has this user logged in?
(b) Write a shell script to display first n numbers of Fibonacci series. [8+8]
4. (a) Explain about different conditional expressions available in Bourne shell.
(b) Write a shell script which receives two filenames as arguments. It should check
whether the two file’s contents are same or not. If they are same then second
file should be deleted. Use ‘cmp’ command to compare files. [8+8]
5. (a) Write the difference between fgetc and getc system calls.
(b) Write the syntax of fflush system call give an example. [8+8]
6. (a) Write the differences between wait and waitpid system calls.
(b) Explain threads. [8+8]
7. Explain the concept of requesting and releasing a lock. [16]
8. The syntax of msgget system call is int msgget(key t key, int flag)
(a) Explain type of key
(b) Explain what value it returns
(c) What is the use of flag
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