Process State
What is a Process State?
A process state refers to the current status of a process in an operating system.
Types of Process States
- New: The process is created and is being initialized.
- Ready: The process is waiting for CPU time and is ready to execute.
- Running: The process is currently executing and using CPU time.
- Waiting: The process is waiting for an event to occur, such as I/O completion.
- Zombie: The process has finished execution but its PCB remains.
- Dead: The process has finished execution and its PCB is removed.
Process State Transitions
- New → Ready: The process is initialized and is ready to execute.
- Ready → Running: The process is scheduled and starts executing.
- Running → Waiting: The process is waiting for an event to occur.
- Waiting → Ready: The event occurs and the process is ready to execute.
- Running → Zombie: The process finishes execution but its PCB remains.
- Zombie → Dead: The PCB is removed and the process is terminated.
Importance of Process States
- Enable Process Management: Process states help the operating system manage processes.
- Improve System Performance: Process states help the operating system optimize resource allocation.
- Enhance System Stability: Process states help the operating system handle process termination and resource cleanup.
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