Errors

Exceptions

Both errors and exceptions

Neither.

Throwable

Catchable

Runable

Problem

No. You can write a program to catch just the exceptions you want.

No. But if a program catches one type of exception it must catch all other types as well.

Yes. If a program is not written to catch all exceptions it will not compile.

Yes. A program can not do I/O unless it catches all exceptions.

ArithmeticException

RunTimeException

NumberFormatException

NumberError

Some of the statements in a try{} block will never throw an exception.

The statements in a try{} block may throw several types of exception.

The try{} block can not contain loops or branches.

The try{} block must appear before the catch{} blocks.

There can be several catch{} blocks in a try/catch structure.

The catch{} block for a child exception class must PRECEED that of a parent execption class.

The catch{} block for a child exception class must FOLLOW that of a parent execption class.

If there is no catch{} block there must be a finally{} block.

Error, Exception

Exception, RunTimeException

Throwable, RunTimeException

ArithmeticException, RunTimeException

This is not legal, so the program will not compile.

The method throws the exception to its caller, exactly if there were no try{} block.

The program halts immediately.

The program ignores the exception.

There must always be one, following the last catch{} block.

There can be zero or one immediately after each catch{} block.

There can be zero or one, following the last catch{} block.

There can be any number, following the last catch{} block.

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()

Use ls -l

Use sizeof()

Use filesize()

Use fstat()