1.2.1 Systems Software

Question 1

What is a scheuler?

Answer 1

It is part of the OS that uses a scheduling algorithm to determine how to share the processor time

Question 2

What is Round Robin Scheduling?

Answer 2

• Each process is given a fixed amount of processor time

- If it is not finished then it has to go to the back of the queue

Question 3

What is First Come First Served Scheduling?

Answer 3

• The first instruction in the queue will be processed first

- Like a supermarket

Question 4

What is Shortest Job First Scheduling?

Answer 4

• The shortest job will worked out and completed

- This means that big jobs may not be completed

Question 5

What is Shortest Remaining Time Scheduling?

Answer 5

• The scheduler estimates how long each process will take
• It then picks the one that will take the least amount of time
• If a job is added with a shorter remaining time then the scheduler is switched to that one

Question 6

What is Multi-level Feedback Queues?

Answer 6

This takes into account the priority of a task

-This is done as there are two queues , one with high priority and one with low priority