Jawaharlal Nehru Technological University Hyderabad 2010-3rd Sem M.C.A -ester Supplementary s UNIX NETWORK PROGRAMMING - Question Paper

Code No: 33
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
MCA-III Semester Supplementary exams July 2010
UNIX NETWORK PROGRAMMING
Time: 3hours Max.Marks:60
ans any 5 ques.
All ques. carry equal Marks

1.a) discuss the subsequent utilities:
i) df ii) finger
iii) ftp iv) mv
v) tee vi) pg
b) discuss briefly about Vi editor.
2.a) Write a C program to obtain whether a provided file is a file or a directory.
b) What is a shell? discuss why there is a single kernel and multiple shells.
3. define how files can be shared in UNIX and discuss concept of dup( ).
4.a) What is a process? Write a C program to begin a new process.
b) Write the differences between:
i) Kill and raise functions
ii) vfork ( ) and exec ( )
5.a) Write brief notes on:
i) File locking
ii) Record locking
iii) Semaphores.
b) elaborate the various kernel data structures maintained by kernel for message
queues?
6.a) elaborate the various kernel data structures maintained by kernel for semaphore?
Explain.
b) Why should we associate a kind with every message? discuss the purpose of
having a kind associated with every message, in detail.
7.a) discuss briefly file locking with semaphores.
b) List out the various kernel data structures maintained by kernel for shared
memory. discuss briefly.
8.a) Write short notes on TCP/IP model illustrating with suitable diagrams.
b) Illustrate the steps involved in a connection less protocol for a typical client
server. Write in brief about the system cells involved on the client and server side.

Earning:   Approval pending.