What is the practical significance of fork

[Chaitannya Mahatme <chaitannya@xxxxxxxxx>]

Hello Everyone,

I tried finding answer to this question in many books but never quite got a satisfactory answer to this question.

A fork process would replicate it parent, my question is

1. Why is fork necessary to create a process. Why replicate a existing process before creating a new process.
   
2. The exec algorithm is executed after fork which overrides what fork has done, then why do fork. Why can't we directly do exec.

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Cheers !!!
Chaitannya

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