Web Reference: Jan 6, 2026 · FCFS Scheduling is a non-preemptive algorithm, meaning once a process starts running, it cannot be stopped until it voluntarily relinquishes the CPU, typically when it terminates or performs I/O. This method schedules processes in the order they arrive, without considering priority or other factors. How Does FCFS Work? FCFS is considered as simplest CPU-scheduling algorithm. In FCFS algorithm, the process that requests the CPU first is allocated in the CPU first. The implementation of FCFS algorithm is managed with FIFO (First in first out) queue. FCFS scheduling is non-preemptive. Learn FCFS (First-Come-First-Serve) scheduling algorithm with simple explanation and 21 practice questions. Boost your OS exam preparation at CS Vidyalaya.
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