Question: Which of the following Statement is TRUE for First-Come, First-Served Scheduling <ol> <li>When a process enters the ready queue, its PCB is linked onto the tail of the queue. When the CPU is free, it is allocated to the process at the head of the queue</li> <li>FCFS scheduling algorithm is preemptive</li> <li>The implementation of the FCFS policy is easily managed with a FIFO queue</li> <li>the average waiting time under the FCFS policy is often quite small</li> </ol>

Answer:

Note that the FCFS scheduling algorithm is nonpreemptive ,the major Disadvantages of FCFS policy is the average waiting time under the FCFS policy is often quite long.