016. OCR A Level (H046-H446) SLR4 – 1.2 Scheduling

About this video

OCR Specification Reference
AS Level 1.2.1d
A Level 1.2.1d

One of the main jobs of the operating system is to schedule what tasks have access to the processor and for how long, it does this uses scheduling algorithms. This video discusses a variety you need to know for your exam.

Key question:

- From all the open programs in memory, how does the CPU decide which process to execute?

00:00 Scheduling
00:15 Intro
00:20 What is scheduling?
01:05 How does scheduling work?
02:26 First come first serve (FCFS)
03:05 Shortest job first (SJF)
03:53 Round robin (RR)
05:21 Shortest remaining time (SRT)
06:31 Process blocking
07:16 Multi-level feedback queues (MLFQ)
08:34 Summary
08:53 Key question
09:05 Outro

Last updated: 19.03.26

Other videos on this course