[Interview Question] What is the difference between Fork and Exec?

What do fork() and exec() have in common?

Used by one process to execute another process

fork()

• Allocates memory for a new process

• process is added (we have one process with a different PID)

exec()

• does not allocate additional memory for the new process

• Load the new process by overwriting the existing process (same PID)

→ The new process will work after the call, so programs after the execution point of the existing program will not work

Notes.

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