Which scheduling algorithm is better?

Sometimes FCFS algorithm is better than the other in short burst time while Round Robin is better for multiple processes in every single time. However, it cannot be predicted what process will come after. Average Waiting Time is a standard measure for giving credit to the scheduling algorithm.

Which scheduling algorithm has the best response time?

SJF is optimal in terms of average waiting time for a given set of processes,i.e., average waiting time is minimum with this scheduling, but problems are, how to know/predict the time of next job.

Why are FCFS and SJF considered as special cases of priority scheduling?

The SJF algorithm is a special case of the general priority scheduling algorithm. A priority is associated with each process, and the CPU is allocated to the process with the highest priority. Equal-priority processes are scheduled in FCFS order. The larger the CPU burst, the lower the priority, and vice versa.

What is the advantages of FCFS?

Let’s start with the Advantages: FCFS algorithm doesn’t include any complex logic, it just puts the process requests in a queue and executes it one by one. Hence, FCFS is pretty simple and easy to implement. Eventually, every process will get a chance to run, so starvation doesn’t occur.

Does SRTF cause starvation?

In SRTF, job with the shortest CPU burst will be scheduled first. Because of this process, It may cause starvation as shorter processes may keep coming and a long CPU burst process never gets CPU.

Is SJF and SRTF the same?

In a non-preemptive kernel, this is known as SJF, shortest-job first. In a preemptive kernel this algorithm is known as SRTF, shortest remaining time first.

What is the difference between SJF and FCFS?

FCFS scheduling is the simplest scheduling algorithm, but it can cause short processes to wait for very long processes (convoy effect). SJF scheduling is an improvement over FCFS, taking into account the length of time a process needs to complete (CPU burst). SJF is provably optimal, providing the shortest average waiting time.

What is the difference between Shortest job first and FCFS?

Shortest Job First (SJF) executes the processes based upon their burst time i.e. in ascending order of their burst times. FCFS is non preemptive in nature. SJF is also non-preemptive but its preemptive version is also there called Shortest Remaining Time First (SRTF) algorithm.

What is the difference between FCFS and round robin scheduling?

Abstract – Task scheduling is needed to maintain every process that comes with a processor in parallel processing. In several conditions, not every algorithm works better on the significant problem. Sometimes FCFS algorithm is better than the other in short burst time while Round Robin is better for multiple processes in every single time.

What is the use of SJF algorithm?

SJF algorithm is a special case of priority scheduling. Each process is equipped with a priority number that is burst time. CPU is allocated to the process that has the highest priority (smallest integer value is usually the biggest priority) [11]. processes have the same priority, then it will use FCFS algorithm.