Consider a set of n tasks with known runtimes r1,r2,.....rn to be run on a uniprocessor machine. which of the following processor scheduling algorithms will result in the maximum throughput?a)Round - robinb)Shortest job firstc)FCFSd)Priority schedulingCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Shortest Job First Scheduling Algorithm for Maximum Throughput
Shortest Job First (SJF) scheduling algorithm is known for maximizing throughput in a uniprocessor system. Here's why SJF is the best choice among the given options:

1. Minimizes Average Waiting Time:
SJF prioritizes tasks with the shortest runtime, which helps in minimizing the average waiting time of tasks in the queue. This leads to faster completion of tasks and hence, higher throughput.

2. Optimal Use of CPU:
By selecting the shortest job first, SJF ensures that the CPU is utilized optimally. This means that smaller tasks are processed quickly, allowing the CPU to move on to the next task sooner, thus increasing throughput.

3. Avoids Long Job Starvation:
SJF prevents long jobs from starving by processing shorter tasks first. This ensures that all tasks, regardless of their runtime, get executed in a timely manner, leading to better throughput.

4. Efficient Resource Utilization:
SJF optimizes resource utilization by focusing on completing tasks efficiently. This results in a higher number of tasks being processed within a given time frame, thereby increasing throughput.
In conclusion, the Shortest Job First (SJF) scheduling algorithm is the best choice for maximizing throughput in a uniprocessor system due to its ability to minimize waiting time, optimize CPU usage, prevent job starvation, and efficiently utilize resources.

Answer

Shortest job first scheduling:
In this job scheduling algorithm, the process having the shortest burst time or runtime will be executed first. It can be preemptive or non - preemptive. It reduces the waiting time for other processes. It results in maximum throughput.

Round-robin scheduling:
In this, each process has a time quantum associated with it. Each process gets an equal share of time to execute. It is a preemptive scheduling algorithm.

FCFS:
FCFS is a first come first serve scheduling algorithm. The process which comes first in the queue will be executed first. Processes are executed in the order of their arrival. It is the simplest scheduling algorithm.

Priority scheduling:
It is a non-preemptive scheduling algorithm. Each process is assigned a priority and they are executed in the order of their priority. Process having the highest priority will be executed first and so on. Priority is decided on the basis of memory requirements, time, and resources.
Therefore Shortest job first scheduling (SJF) will result in the highest throughput.

Similar Computer Science Engineering (CSE) Doubts

Consider a set of n tasks with known runtimes r1, r2, .... rn to be run on a uniprocessor machine. Which of the following processor scheduling algorithms will result in the maximum throughput?

Consider a set of n tasks with known runtimes r1, r2, .... rn to be run on a uniprocessor machine. Which of the following processor scheduling algorithms will result in the maximum throughput?

Consider a set of n tasks with known runtimes r1, r2....rn to be run on a uniprocessor machine. Which of the following processor scheduling algorithms will result in the maximum throughput?

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