GATE CSE 2024 | Set 1 | Question: 15

Question

Which of the following process state transitions is/are NOT possible?

• A. Running to Ready
• B. Waiting to Running
• C. Ready to Waiting
• D. Running to Terminated

Comments

When a process is in ready state then the resources which this process hold are not in use then at that time OS can prempt it's resources if necessary, then in that condition the state of this process changes to wait state.

Answer 1

Consider the following process state diagram:

 

From the above process state diagram, it is clear that:

• A process can go from running to ready.
• A process can go from running to exit/terminate.
• A process can not go from waiting to running and ready to wait.

Option $(B,C)$ is correct.

Similar types of questions are asked in:

1.  GATE CSE 2020 | Question: 12
2.  GATE CSE 2009 | Question: 32