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Explain some system calls used for process management.The following are the system calls:
- fork() - For creating child process
- vfork() - For creating child process only to copy-on-write
- exec() - For performing a different task.
- wait() - To make a process to wait for completion of execution.
- kill() - For sending a signal to a process
- signal() - For handling a signal.
- exit() - To exit out of execution of a process
- _exit() - To exit out of execution of a process without clean up.
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