Operating Systems · Processes, Threads and IPC
Official IIT answer key · IIT Delhi · Audited Aug 2026
GATE CSE 2020 Q12 · MCQ · 1 mark
Key concept
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Topic notes
GATE evaluates the 'Processes' topic primarily through the standard 5-state process lifecycle (New, Ready, Running, Blocked/Waiting, Terminated) and the valid/invalid transitions between these states. Questions consistently test the exact path of a process during execution, preemption, and I/O invocation. Recent trends show a progression from purely theoretical transition checks (MCQ/MSQ) to procedural tracing of state changes in C code execution (NAT).
Full Processes, Threads and IPC guide →Consider 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?
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Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.
