Process State

Operating System: Process State
Topics discussed:
1) New state.
2) Running State.
3) Waiting State.
4) Ready State.
5) Terminated State.

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[phanindrareddy]

Very clear voice
Please upload fastly
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[quratraja]

Thank Sir!
Different states of a process have been explained along with their transition from one state to other. When a process is being cleared, it's in New. Ready is when it's to be assigned to the processor. When instructions of the program starts execution, it's running and when it's waiting for some event to occur, it's in waiting state. When it's complete and reaches to end, it's terminated.
From running a program can move towards waiting, ready or terminated.

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[hoangminhchau]

When a process is in execution, it changes states.

There are 5 states of a process:
- NEW: a process is being created
- READY: a process is waiting to be assigned to a processor
- RUNNING: a process is executing its instructions
- WAITING: a process is waiting for some event (I/O operation, signal...)
- TERMINATED: a process finishes its execution


Flow:
A process is created (NEW) => READY. When it's dispatched by the OS scheduler, it changes to RUNNING state.
- If it's finished its execution => TERMINATED
- If it's interrupted (by another process with higher priority) => READY
- If it's waiting for some event => WAITING. After the event occurs => READY

[gaurav]

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[mohamadtabbakh]

I've seen your series on theory of computation and I'm in love with your style of teaching. This series is also doing wonders for me, as well. But I'd like to point out that the definition of a terminated state might be revised for more accuracy. you said that a terminated process is a process that's finished executing. But a process can be terminated abruptly even if it's not finished executing because of some error maybe or other reasons. I'd say that a more accurate definition of a terminated process would be a process that's deallocated from memory and from the cpu. I don't think the professor will read this so for anyone who's reading this comment, tell me if this definition is wrong/could be optimized.

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Clear and concisely taught

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[rahulgupta-zqbk]

Awesome videos, waiting for next videos.