Here is a comparison between the First Come First Serve (FCFS) and Round Robin (RR) scheduling algorithms in operating systems :
| Feature | First Come First Serve (FCFS) | Round Robin (RR) |
|---|---|---|
| Purpose | Executes tasks in the order they arrive | Allocates equal time slices to each task in a cyclic order |
| Priority | Assigns equal priority to all tasks | Assigns equal priority to all tasks |
| Task scheduling | Schedules individual tasks | Schedules individual tasks |
| Task prioritization | Prioritizes tasks based on arrival time | Prioritizes tasks equally |
| CPU utilization | Low CPU utilization | Depends on time slice length |
| Latency | High latency for long tasks | Depends on time slice length |
| Responsiveness | Slow response time for long tasks | Depends on time slice length |
| Memory requirements | Low memory requirements | Low memory requirements |
| Preemptive or Non-Preemptive | Non-preemptive | Preemptive |
| Interrupt handling | Handles interrupts | Handles interrupts |
| Context switching | Low rate of context switching | High rate of context switching |
| Task completion | Long tasks complete slowly | All tasks complete in a fixed time interval |
| Wait time | High wait time for long tasks | High wait time for long tasks |
| Throughput | Low throughput | Depends on time slice length |
| Fairness | Fair to all tasks | Fair to all tasks |
Note that the exact behavior and performance of the FCFS and RR algorithms can vary based on the specific implementation and the workload being scheduled. FCFS is a simple and straightforward algorithm that is easy to implement and understand, while RR is more flexible and can be used in a variety of scheduling scenarios. The choice between the two algorithms depends on the requirements and constraints of the system and the workload being scheduled.
