Project ForgeConsider the following statements about process state transitions for a system using preemptive scheduling.
I. A running process can move to ready state. II. A ready process can move to running state. III. A blocked process can move to running state. IV. A blocked process can move to ready state.
Which of the above statements are TRUE?
- AI, II, and III only
- BII and III only
- I, II, and IV only
- DI, II, III, and IV
Explanation
I is TRUE: preemption moves a running process back to ready. II is TRUE: the scheduler dispatches a ready process to running. III is FALSE: a blocked (waiting) process cannot jump directly to running — it must first become ready once its I/O or event completes, then be scheduled. IV is TRUE: when a blocked process's wait condition is satisfied, it moves to ready. So I, II, and IV only.
Source: GATE CS 2020 (2020)
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