Download JNTU (OR) M.TECH 2-Semester ADVANCED UNIX PROGRAMMING JULY/AUG-2006 Exam Question Paper | Indian Shout

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Download JNTU (OR) M.TECH 2-Semester ADVANCED UNIX PROGRAMMING JULY/AUG-2006 Exam Question Paper

Code No: OR-211/CS

M.Tech. II-Semester Examinations, July/August-2006.
ADVANCED UNIX PROGRAMMING
(Computer Science)
Time: 3 hours Max. Marks: 60
Answer any FIVE questions
All questions carry equal marks

– – –
1.a) Write a shell script which receives any year from the keyboard and determines whether the year is a leap or not. If no argument is supplied the current year should be assumed?
b) Describe input and output redirection with your own example?

2.a) A friend of yours has promised to log in at a particular time. However he has not kept the promise. You want to contact him as soon as he logs in. Write a shell script which checks after every one minute whether your friend has logged in or not. The log name should be supplied to the shell script at command prompt.
b) Write a program that creates a file, and writes a text of data. And the program should output all the characters that are at positions divisable by 5. (That is 0th, 5th, 10th, 15th………characters).

3.a) Describe fork () system call? And write a C-program that calls fork () for executing a function that adds sum of numbers from 1 to 10,000.
b) Describe Wait () and Zombie process.

4.a) What are unreliable signals? Write a program that takes control to a given function fun (), when an interrupt signal ∧C is generated. Second time onwards it should ignore the signal?
b) Describe the process state diagram of unix.

5. Describe the use of File and Record locking. And explain how to implement them.

6.a) What are message queues? How they differ from pipes?
b) What are pipes? What happens when a pipe system is calle? Explain how they are different from ordinary files.

7.a) Describe OSI protocols.
b) Describe UUCP.

8. Write short notes on the following:
a) Network commands
b) Security and file permissions
c) Backup utilities.

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