Process States In Operating System In Hindi | NET-GATE BTech- BE-BCA- OS Lectures By Deepak
New (Create) - In this step, the process is about to be created but not yet created, it is the program which is present in secondary memory that will be picked up by OS to create the process.
Ready - New - Ready to run. After the creation of a process, the process enters the ready state i.e. the process is loaded into the main memory. The process here is ready to run and is waiting to get the CPU time for its execution. Processes that are ready for execution by the CPU are maintained in a queue for ready processes.
Run - The process is chosen by CPU for execution and the instructions within the process are executed by any one of the available CPU cores.
Blocked or wait - Whenever the process requests access to I/O or needs input from the user or needs access to a critical region(the lock for which is already acquired) it enters the blocked or wait state. The process continues to wait in the main memory and does not require CPU. Once the I/O operation is completed the process goes to the ready state.
Terminated or completed - Process is killed as well as PCB is deleted.
Suspend ready - Process that was initially in the ready state but were swapped out of main memory(refer Virtual Memory topic) and placed onto external storage by scheduler are said to be in suspend ready state. The process will transition back to ready state whenever the process is again brought onto the main memory.
Suspend wait or suspend blocked - Similar to suspend ready but uses the process which was performing I/O operation and lack of main memory caused them to move to secondary memory.
When work is finished it may go to suspend ready.
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10- What Is A Process
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11-Processes Model
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12- Process States
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13- Process Hierarchies
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14- Process Table
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15- Implementation Of Processes
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22 июл 2019
