What is the full form of FCFS?a.First-come, First Served b.Last-come, First-served c.Service In Random Order d.First Come, Last Served

The full form of FCFS is a. First-come, First Served.

FCFS is a scheduling method used primarily in operating systems and process management. In this approach, the process that arrives first in the queue is the one that gets served first. This method is straightforward and easy to implement, as it follows a simple principle akin to a queue in real life; for example, the first customer in line at a store is the first one to be served. While FCFS is fair in terms of order, it can lead to potential drawbacks such as the "convoy effect," where shorter processes wait behind longer ones, potentially leading to inefficiencies and increased wait times. Overall, while FCFS provides simplicity and fairness, it may not always be the most efficient scheduling algorithm, especially in environments with processes of varying lengths. Thus, it’s particularly notable in contexts where predictability of performance is necessary.