Download JNTUH MCA 4th Sem R15 2018 January 824AB Linux Programming Question Paper

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 4th Sem (Fourth Semester) Regulation-R15 2018 January 824AB Linux Programming Previous Question Paper

R15

Code No: 824AB











JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA IV Semester Examinations, January - 2018

LINUX PROGRAMMING

Time: 3hrs













Max.Marks:75

Note: This question paper contains two parts A and B.

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries
10 marks and may have a, b, c as sub questions.



PART - A



















5 ? 5 Marks = 25

1.a)

Describe the special parameters used by shell.









[5]



b) What are hard links? Give their advantages and disadvantages.





[5]

c) Discuss the role of kill and raise functions in signal generation.





[5]

d) Write a program to implement the creation of a pipe.







[5]



e) What system calls are used to send and receive the data through sockets?

[5]



PART - B

















5 ? 10 Marks = 50

2.

What is sed? Explain addressing in sed with suitable examples.





[10]

OR

3.a)

What is the exit status of a command and where is it stored?

b)

Write a shell script to display the current users of the system who have logged in for more
than half an hour.

















[5+5]


4.a)

What is an i-node? Explain the process of conversion of file path name to an i-node.

b)

Explain fseek, fopen, fclose system call in detail.









[5+5]

OR

5.

What is a directory? List and explain various directory maintenance systems calls that are
present in unix.

















[10]


6.a)

What is a zombie process? Give its significance.

b)

Write a program to implement the sleep function.







[5+5]

OR

7.

Explain the role of the following system calls with respect to process:
a) fork()

b) Wait()

c) Exec()

d) waitpid e) vfork



[10]


8.

How to achieve the inter process communication by using FIFOs? Explain with some code
snippets.



















[10]

OR

9.

What is Semaphore? Explain how you would use semaphore system calls to solve critical
section problems.

















[10]


10.a) Describe the role of port numbers with respect to sockets.
b) Explain Byte-Ordering, address format and address lookup in Sockets.



[5+5]

OR

11.a) What is a socket? Explain the socket system call along with the parameters present in it.
b) Which system call is used to create shared memory segment and explain it.

[5+5]

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