A Detailed Overview FCFS (First-Come, First-Served) CPU Scheduling Algorithm:

 The FCFS (First-Come, First-Served) CPU Scheduling algorithm is the simplest scheduling algorithm used by computer operating systems. In this algorithm, the CPU executes the processes in the order they arrive. The algorithm is based on the principle of “first come, first served,” meaning that the process that arrives first will be executed first. In this article, we will take a detailed look at the FCFS algorithm and its strengths and weaknesses.

How does the FCFS Algorithm work?

The FCFS algorithm is straightforward. When a process arrives, it is added to the end of the ready queue. The CPU then executes the process at the head of the queue until it is completed. Once the process has finished, the next process in the queue is executed, and so on.

The main advantage of the FCFS algorithm is its simplicity. The algorithm is easy to implement and requires no special knowledge of the characteristics of the processes. The FCFS algorithm is also fair in that it treats all processes equally, giving each process an equal chance to execute.

Pros of the FCFS Algorithm

⦁ The FCFS algorithm has several strengths, making it a popular choice for many applications. Here are some of the main strengths of the FCFS algorithm:

⦁ Simple Implementation: The FCFS algorithm is straightforward to implement, requiring only a basic understanding of the process management system.

⦁ Fairness: The FCFS algorithm is fair in that it treats all processes equally. Each process has an equal chance to execute.

⦁ Predictability: The FCFS algorithm is predictable. Since it is based on the order of arrival, it is easy to predict which process will be executed next.

⦁ No Starvation: The FCFS algorithm ensures that no process is starved of CPU time. Each process is executed in the order it arrives, ensuring that all processes receive CPU time.

Cons of the FCFS Algorithm

⦁ Although the FCFS algorithm has several strengths, it also has some weaknesses. Here are some of the main weaknesses of the FCFS algorithm:

⦁ Long Waiting Times: The FCFS algorithm can result in long waiting times for processes that arrive later. Since processes are executed in the order they arrive, processes that arrive later have to wait until all the processes that arrived earlier have completed their execution.

⦁ Inefficient Use of CPU Time: The FCFS algorithm can result in inefficient use of CPU time. If a long-running process arrives first, it will use up a significant amount of CPU time, leading to a delay in the execution of subsequent processes.

⦁ No Prioritization: The FCFS algorithm does not prioritize processes based on their importance or urgency. This can be a problem in situations where some processes are more critical than others.

⦁ No Pre-emption: The FCFS algorithm does not support preemption. Once a process starts executing, it continues to run until it is completed. This can be a problem in situations where a critical process needs to be executed immediately.

Concept of FCFS using daily life example 

Concept of FCFS using daily life example 

Conclusion:

In conclusion, the FCFS (First-Come, First-Served) CPU Scheduling algorithm is a simple and fair algorithm that treats all processes equally. Its simplicity makes it easy to implement, and its predictability makes it a popular choice for many applications. However, the FCFS algorithm also has some weaknesses, such as long waiting times, inefficient use of CPU time, lack of prioritization, and no preemption. These weaknesses make it less suitable for some applications. Therefore, it is essential to consider the strengths and weaknesses of the FCFS algorithm carefully before choosing it for a specific application.