Lesson 6 - Types of operating systems and virtual machines Flashcards Preview

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Flashcards in Lesson 6 - Types of operating systems and virtual machines Deck (10)
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1

What is distributed os

- They are used on super computers
- Run access multiple devices and are used to spread the load across multiple computers
-They can flexibly distribute the workload over all of the computers.

2

What is embedded os?

- Designed for specific tasks and devices.
-Difficult to update
- They consume much less power.

3

Give examples of embedded os.

- Air pods.
-Microwaves.

4

What is a multi tasking os

-Let's you carry out different tasks at the same time.
- Uses time slicing to simulate parralel processing.

5

What is multiuser os?

-One computer can be used by multiple people.
- A super computer that needs to accessecx by multiple people to run different jobs.
- Scheduling algorithms are used to distribute the processor time across jobs.

6

What is real time os?

-Used in critical applications.
-These are designed to perform different tasks in a specified time frame.
Interrupts are controlled alot
- MOst operating systems are not real time.

7

Why are most operating systems not real time?

- They are expensive to design as they are so specific to jobs.

8

Give examples of real time operating systems would be used in.

-Nuclear power plants - for example the rod not getting too hot.
- In planes the flaps must come down at a certain time otherwise there will be a big problem.

9

What does BIOS stand for?

- Basic input and output system.

10

What the the bios?

- When the computer starts up the program counter is pointed towardds the bios code. e.g. Posting.