Lesson 6 - Types of operating systems and virtual machines Flashcards

1
Q

What is distributed os

A
  • 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.
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2
Q

What is embedded os?

A
  • Designed for specific tasks and devices.
  • Difficult to update
  • They consume much less power.
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3
Q

Give examples of embedded os.

A
  • Air pods.

- Microwaves.

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4
Q

What is a multi tasking os

A
  • Let’s you carry out different tasks at the same time.

- Uses time slicing to simulate parralel processing.

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5
Q

What is multiuser os?

A
  • 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.
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6
Q

What is real time os?

A

-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.

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7
Q

Why are most operating systems not real time?

A
  • They are expensive to design as they are so specific to jobs.
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8
Q

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

A
  • 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.
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9
Q

What does BIOS stand for?

A
  • Basic input and output system.
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10
Q

What the the bios?

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