Day 01Part 10-Gate lecture of Operating system for cse – Operating system Process state in simple way
Day 01Part 10-Gate lecture of Operating system for cse – Operating system Process state in simple way
Contents [hide]
- 1 Operating System – Process States (GATE CSE) | Day 01 Part 10
- 2 Process States in Operating Systems:
- 3 1. New:
- 4 2. Ready:
- 5 3. Running:
- 6 4. Blocked/Waiting:
- 7 5. Terminated/Exit:
- 8 Process State Transition Diagram:
- 9 New | v Ready <----> Running | | v v Blocked/Waiting Terminated
- 10 Important Transitions Explained:
- 11 GATE Exam Key Points:
- 12 Sample GATE Question:
- 13 Day 01Part 10-Gate lecture of Operating system for cse – Operating system Process state in simple way
- 14 OPERATING SYSTEMS LECTURE NOTES MALLA …
- 15 OPERATING SYSTEM
Operating System – Process States (GATE CSE) | Day 01 Part 10
What is a Process?
A process is a program in execution. It is an active entity, unlike a program, which is a passive collection of instructions.
Process States in Operating Systems:
An operating system handles multiple processes by tracking their states. These states help manage and control the execution of processes effectively.
1. New:
- The process is being created.
- It is not yet ready to execute.
2. Ready:
- The process is ready to execute and waiting for CPU time.
- It is in the queue for CPU allocation.
3. Running:
- The process is currently executing on the CPU.
- Only one process can be in this state on a single-core CPU.
4. Blocked/Waiting:
- The process is waiting for an event to occur, like I/O completion.
- It cannot continue until the event happens.
5. Terminated/Exit:
- The process has completed its execution or has been terminated by the OS.
- It is now removed from the system.
Process State Transition Diagram:
New
|
v
Ready <----> Running
| |
v v
Blocked/Waiting Terminated
|
v
Ready <----> Running
| |
v v
Blocked/Waiting Terminated
Important Transitions Explained:
- New → Ready: Process created, ready to execute.
- Ready → Running: Scheduler selects the process for execution.
- Running → Blocked: Waiting for I/O or resources.
- Blocked → Ready: I/O completed; ready to resume.
- Running → Ready: Preempted by the scheduler (due to time slice completion).
- Running → Terminated: Process completed or terminated.
GATE Exam Key Points:
- Focus on the state transition diagram.
- Understand the difference between Blocked and Ready states.
- Be clear about preemptive vs. non-preemptive scheduling.
Sample GATE Question:
Q. In a multi-programming environment, if a running process is performing an I/O operation, its state is changed to:
(A) Ready
(B) Running
(C) Blocked/Waiting
(D) Terminated
Answer: (C) Blocked/Waiting
Tip: Practice previous GATE questions on process management for better understanding. If you need more detailed explanations or help with problems, just ask!