"Answer the WHY? higlighted below the answer should not exceed three lines" Operating System Process Life Cycle: Creation

Once the initial boot process is done and the operating system is loaded on the machine, it will create some number of initial processes

When a user logs into a system, a user shell process is created. And then when the user types in commands, like list or emacs, then new processes get spawned from that shell parent process

Process Creation

Mechanisms for process creation:

Fork $$

Copies the parent PCB into the new PCB

Child continues execution at instruction after fork

EXEC $$

Replace child imap

Load new program and start from first instruction

More on FORK

The operating system will create a new Process Control Block for the child

Then it will copy the exact same values from the parent Process Control into the child Process Control Block

At that point, both the parent and the child will continue their execution at the instruction that's immediately after the fork. WHY?......

After the operating system completes the fork, both of these processes will start their execution at the exact same point