Download JNTUH MCA 3rd Sem R13 2018 June-July 813AM Linux Programming Question Paper

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Code No: 813AM

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

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MCA I Semester Examinations, June/July - 2018

LINUX PROGRAMMING

Time: 3 Hours Max. Marks: 60

Note:

1. This question paper contains two parts A and B.

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2. 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, c as sub questions.

PART - A

5 x 4 Marks =20

1. Explain command substitution. [4]
2. Explain the functionality of lseek() function. [4]

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3. What is the difference between wait() and waitpid(). [4]
4. With the help of syntax explain popen() function. [4]
5. Explain how to perform IPC between processes over a network. [4]

PART -B

5 x 8 Marks =40

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1. Explain various process utilities available in linux.

   OR

   Write a shell script that deletes all lines containing a specified word in one or more files supplied as arguments to it. [4+4]
2. Develop an AWK program to summarize from the list of all processes, a count of processes run by every user (including root).

   OR

   Write about text processing utilities. [4+4]
3. Differentiate between the following terms:
   1. getc( ) Vs fgetc()

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   2. stat( ) Vs fstat( )
   3. printf( ) Vs fprintf( )
   4. scanf( ) Vs fscanf( ). [8]

   OR

   Explain the file and record locking techniques with relevant example code snippet? [8]

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4. Explain the layout of a C program image in main memory.

   OR

   Define orphan process. Write a program to illustrate the orphan process concept. [4+4]
5. Write a c program that accepts two small numbers as arguments and then sums the two numbers in a child process. The sum should be returned by child to the parent as its exit status and the parent should print the sum? [8]

   OR

   Describe the API provided by linux for semaphores. [8]
6. Write a program and explain how to transfer a large amount of data between two processes using Message queues? [8]

   OR

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   Describe Socket system calls used for connectionless protocol with syntax and usage.[8]
7. Explain with a program how to copy file data from server to client using shared memory? [8]

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