Tag: programming languages

Always after execution has left a try{} block, no matter for what reason.

Only when an unhandled exception is thrown in a try{} block.

Only when any exception is thrown in a try{} block.

Always just as a method is about to finish.

lseek(), open(), write(), close()

open(), write(), lseek(), close()

open(), lseek(), open(), , write() close()

None

vforlk() allows more one child process to be created simaltaneously whereas for() allows only one

vfork() retains same PID for child & parent known as virtual PID

vfork() suspends the parent process until child process exits

fork() & vfork() are same

getenv(), setenv()

getenv(), putenv()

readenv(), writeenv()

You cannot environmement variables inside a program

Wakes up kernel from sleeping

Wakes up devices from sleeping

Invokes a kernel to send SIGALARM to the calling process

Invokes a kernel to send SIGALARM to the registered process

A memeory shared between kernel & devices

A memory shared between root user and ordinary user

A memory shared across processes

Harddisk

The interval between child terminating and the parent calling wait()

The interval between parent terminating and the child calling popen()

The interval between parent terminating and the child termination

None

They never releases the memory utilized

They release the memory but kernel does not use them

Since they are running

It’s a false statement

Its not possible

use isused() function

Try to open file with locking enabled

Try to write the file after opening

Use filelock()

use lockfile()

Use lockfd()

use fcntl()