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What is the PID of the first process that is set up when the system is booted?

What is the PID of the first process that is set up when the system is booted? Correct Answer 0

Every process has a parent process, we can’t have any orphaned process for a longer time. The ancestry of every process is ultimately traced to the first process (PID 0) that is set up when the system is booted. It’s like the root directory of the system.

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