[amp_mcq option1=”that last entered the queue” option2=”that first entered the queue” option3=”that has been in the queue the longest” option4=”with the least processor needs E. None of the above” correct=”option2″]
The correct answer is: B. that first entered the queue.
SJF stands for Shortest Job First. It is a scheduling algorithm that prioritizes jobs based on their length. The job with the shortest length is executed first, followed by the job with the second shortest length, and so on.
Option A is incorrect because it would prioritize jobs based on when they last entered the queue, not their length. This would not be a fair or efficient way to schedule jobs, as it would give jobs that entered the queue early an unfair advantage.
Option C is incorrect because it would prioritize jobs based on how long they have been in the queue, not their length. This would also not be a fair or efficient way to schedule jobs, as it would give jobs that have been in the queue for a long time an unfair advantage.
Option D is incorrect because it would prioritize jobs based on their processor needs, not their length. This would not be a fair or efficient way to schedule jobs, as it would give jobs with high processor needs an unfair advantage.
Option E is incorrect because it is not one of the possible answers.