OU M.C.A 2nd Year 2nd Semester UNIX

Osmania University  

M.C.A. II Year II – Semester (Main/Backlog) Examinations

UNIX

( Feb – 2012)

UNIT – I

 1. i. Write about UNIX file structure

     ii. What are three levels of security? Explain in detail about chmod command.

     iii. Explain in detail about the different patterns available in awk.

2.  i. Write an awk script that given a file name as the arugument.deletes all even lines in the files.

    ii. Define grep family and compare the members of the family

    iii. What are the special parameters and variables in the korn shell?

UNIT – II

1. i. What is signal? Write about signal handling with good example.

   ii. What is inter process communication? Explain about IPC with different methods.

2. i. Explain about three types of Unix file system implementation that can be exploited to provide a type of  locking.

    ii. What is shared memory ? What is the importance of it ? Explain in detail about the process of “Allocating a shared memory segment”. Write about controlling of a shared memory segment.

UNIT – III

1. i. Explain about elementary socket system calls. Discuss about necessary system calls sequence in connection oriented client server communication.

   ii. Write short note on socket addresses.

2. i. Explain about Internet super server.

    ii Discuss about following advanced socket system calls.

    (i) readv ( ),writev ( ) (ii) fcntl ( ),ioctl ( )

UNIT – IV

1. i. What are the three categories of perl variables? Explain about them with good examples.

   ii. Discuss in detail about pattern matching in PERL with good examples.

2. i. Write short note on: (i) Form handling in PHP. (ii) Cookies and session tracking.

UNIT – V

1. i. Discuss in detail about lists, dictionaries and tupules in phython.

    ii. Write about FILES handling in python with example.

2. i. Discuss about classes , inheritance, class customization inpython.

    ii. Write about exception handling with example.