Operating Systems

The organisation of memory into fixed-sized units

• Paging
• Segmentation
• Virtual Memory

Used when sufficient immediate-access store is not available

• Paging
• Segmentation
• Virtual Memory

The splitting of a large program into a number of smaller programs

• Paging
• Segmentation
• Virtual Memory

A scheduling algorithm that deals with each user or task in the order in which they arrive

• Round Robin
• First Come First Serve
• Multi-Level Feedback Queue
• Shortest Job First

A complex scheduling algorithm that deals with tasks based on a set of priorities and rules

• Round Robin
• First Come First Serve
• Multi-Level Feedback Queue
• Shortest Job First

A scheduling algorithm that deals with each user or task to be processed in turn.

• Round Robin
• First Come First Serve
• Multi-Level Feedback Queue
• Shortest Job First

A scheduling algorithm that deals with each user or task based on the getting the smaller ones out of the way

• Shortest Remaining Time
• First Come First Serve
• Multi-Level Feedback Queue
• Shortest Job First

A scheduling algorithm that deals with each user or task based on a calculating an estimated time remaking to complete

• Shortest Remaining Time
• First Come First Serve
• Multi-Level Feedback Queue
• Shortest Job First

A highly specialised, often quite limited and cut down operating system design to fit inside a certain type of machine

• Distributed OS
• Embedded OS
• Multi-tasking OS
• Multi-user OS

Software is spread over a collection of independent physically separate nodes networked together.

• Distributed OS
• Real-Time OS
• Multi-tasking OS
• Multi-user OS