Download JNTUH MCA 4th Sem R15 2018 June-July 824AB Linux Programming Question Paper

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

R15

Code No: 824AB













JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA IV Semester Examinations, June/July - 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) How can you debug the shell scripts? Explain.









[5]

b) What are soft links? And What are hard links?



[5]

c) Differentiate threads and processes.











[5]

d) Explain popen () system call.













[5]

e) What are the advantages of Berkeley sockets?









[5]



PART - B

















5 ? 10 Marks = 50

2.a)

Explain Backup utilities.

b)

Write a shell script that allows a user to view, add, delete or modify a setting in a
configuration file?

















[5+5]

OR

3.a)

Develop an AWK program to summarize from the list of all processes, a count of processes
run by every user (including root).

b)

Write about text processing utilities.











[5+5]


4.

Differentiate between the following terms:

a) getc( ) Vs fgetc( ) b) stat( ) Vs fsat( )
c) printf( ) Vs fprint( ) d) scanf( ) Vs fscanf( ).







[5+5]

OR

5.

Write a program to print the type of a file for each command line argument.

[10]





6.a)

What are the signals that are not ignored or blocked? Explain the reason behind it with an
example?

b)

Illustrate SIGKILL and SIGINT with an example program.





[5+5]

OR

7.a)

Differentiate between fork( ) and vfork( ).

b)

Write the syntax of six versions of exec functions and also explain how these functions
differ from each other.















[5+5]









8.

Explain the following concepts about pipes:

a) Pipes between two process b) Pipes among three processes.



[5+5]

OR

9.a) What is message queue explain with example?
b)

Write a program to implement two-way communication using pipes.



[5+5]





10.

Explain a stream socket with a illustrative example for client/server program.

[10]

OR

11.

Explain briefly about the following socket APIs with clear syntax:

a) socket( ) b) bind( )

c) listen( )

d) accept( )

e)connect( ). [10]





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