Download JNTUH MCA 3rd Sem R13 2018 January 813AM Linux Programming Question Paper

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Code No: 813AM R13

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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

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MCA III Semester Examinations, January - 2018

LINUX PROGRAMMING

Time: 3 Hours Max. Marks: 60

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

Part A is compulsory which carries 20 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 8 marks and may have a, b as sub questions.

PART - A 5 x 4 Marks = 20

1. What are filters? List out various filters available in linux. [4]
2. Distinguish between dup() and dup2() system calls. [4]

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3. Explain the sleep() function with syntax. [4]
4. Explain briefly about file locking with semaphores. [4]
5. Explain the necessity of socket address structures. [4]

PART -B 5 x 8 Marks = 40

6. a) Explain associative arrays.
   

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   b) Write a shell script to find the factorial of a number: [4+4]
   OR
   a) Explain various patterns and actions in awk.
   b) Write an awk script to perform simple arithmetic operations. [4+4]
7. a) Explain the support given by kernel for files in detail.
   

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   b) What do you mean by a hole in a file? How does the use of lseek() result in hole in a file? Explain with an example program. [4+4]
   OR
   Explain the following system calls:
   i) open( ) ii) seek( ) iii) read( ) iv) link( ).
   Explain directory handling system calls. [4+4]

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8. 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? [4+4]
   OR
   Explain the below system calls with the help of syntax and examples:
   a) kill b) raise c) alarm d) pause e) abort [8]

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9. a) Explain the following concepts about pipes:
   a) Pipes between two process
   b) Pipes among three process in a shell. [4+4]
   OR
   Define unnamed pipe? How do we create unnamed pipe? Explain the limitations of unnamed pipe.
   

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   Write a program to accept the two integer numbers accepted by child, add them and result should be passed to parent. Parent process should print result on the screen using pipes. [4+4]
10. a) Explain briefly about the following socket APIs with clear syntax:
    i) socket() ii) bind() iii) listen() iv) accept() v) connect( )
    b) Compare various IPC mechanisms. [4+4]
    OR
    

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    a) Compare the IPC functionality provided by message queues with shared memory.
    b) Explain how to handle multiple simultaneous clients. [4+4]

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