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

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Code No: 824AB Rl 5

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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
MCA 1V Semester Examinations, June/July - 2018
LINUX PROGRAMMING
Time: 3hrs Max.Marks:75

Note:

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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, ¢ as sub questions.

PART - A
5 x 5 Marks =25

1. a) How can you debug the shell scripts? Explain. [5]

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2. b) What are soft links? And What are hard links? [5]
3. a) Differentiate threads and processes. [5]
4. b) Explain popen () system call. [5]
5. What are the advantages of Berkeley sockets? [5]

PART -B

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5 x 10 Marks =50

6. Explain Backup utilities.
7. Write a shell script that allows a user to view, add, delete or modify a setting in a configuration file? [5+5]
   OR
   Develop an AWK program to summarize from the list of all processes, a count of processes run by every user (including root).

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8. Write about text processing utilities. [5+5]
9. Differentiate between the following terms:
   a) getc( ) Vs fgete() b) stat( ) Vs fsat( )
   ¢) printf( ) Vs fprint( ) d) scanf( ) Vs fscanf{( ). [5+5]
   OR
   

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   Write a program to print the type of a file for each command line argument. [10]
10. What are the signals that are not ignored or blocked? Explain the reason behind it with an example? Illustrate SIGKILL and SIGINT with an example program. [5+5]
    OR
    Differentiate between fork( ) and vfork( ).
    Write the syntax of six versions of exec functions and also explain how these functions differ from each other. [5+5]

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9. Explain the following concepts about pipes:
   a) Pipes between two process b) Pipes among three processes. [5+5]
   

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   OR
   What is message queue explain with example?
10. Write a program to implement two-way communication using pipes. [5+5]
11. Explain a stream socket with a illustrative example for client/server program. [10]
    OR
    

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    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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