UNIX QUESTIONS FOR MID-II

UNIX MID-II IMPORTANT

1. a)Explain how file or resource is shared in unix?
b)what are common asnd different features in parent and child processes?
2. a)Short notes on calloc,malloc,free funcs
b)what is exec function and discuss various exec functions
3. Short notes on wait,vfork,zombieprocess
4. a)what are signals.what are 4 conditions associated with pid argument of kill command
b)
i)alarmfunction
ii)system function
iii)recordlocking
5. Short notes on ioctl,fcntl,lstat functions
6. a) What is stream.discuss types of stream reading and writing functions wid examples
b) What is shared memory .explain various operations on shared memory?
7. Shortnotes on read function,lseekfunction,symlink function,dup function
8. a) Differentiate between a system call and a libraray function
b) What is a pipe.discuss its features wid examples
c) Syntaxes of shmget,semget,msgget functions and explain.
9. What is a semaphore.discuss implementation in detail
10. What is a message queue.discuss features and usage in ipc.

PROGRAMS:
1. To use a common pipe to share a message between parent and child.
2. To implement shared memory using ipc.
3. Write a program to illustrate ecel( ) function.