UGC NET CSE | December 2006 | Part 2 | Question: 37

Question

____________ is one of pre-emptive scheduling algorithm.

• A. Shortest-Job-first
• B. Round-robin
• C. Priority based
• D. Shortest-Job-next

Answer 1

Round Robin Scheduling

• Round Robin is the preemptive process scheduling algorithm.

• Each process is provided a fix time to execute, it is called a quantum.

• Once a process is executed for a given time period, it is preempted and other process executes for a given time period.

• Context switching is used to save states of preempted processes.

Answer 2

Yes all the given scheduling algorithms except Round Robin can have both pre-emptive as well as non-preempitve modes. However we can say Priority based among the given algorithms is one of the pre-emptive algorithm. Hence the option (c) is correct.