Operating Systems

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What are 5 key functions of operating systems?
1) Controlling the input, output and backing storage devices 2) loading, running and storing applications 3) handling errors that occur in applications software 4) managing the user interface 5) keeping a log of the computer usage
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What are the two main types of user interfaces?
CLI: Command Line Interface and GUI: Graphical User Interface
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What are the advantages of CLI?
1) The user communicates directly with the computer 2) Users can make decisions about exactly what they want to see happen 3) Requires much less RAM than other interfaces 4) A low resolution, cheaper monitor can be used
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What are the disadvantages of CLI?
1) Can be very slow 2) Requires generally a specialist or technician to operate 3) Difficult to edit or change 4) Minimal errors will lead commands to fail 5) A large number of commands need to be learned 6) Can't guess what the instruction might be
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What are the advantages of GUI?
1) Easy to use 2) WIMP interface 3) No need to learn complicated commands 4) Reasonable 'help' system 5) Benefits of WYSIWYG 6) Lets you exchange data between different software applications
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What are the disadvantages of GUI?
1) Take up a much larger amount of hard drive 2) Need significantly more RAM 3) Use more processing power that CLI 4) Can be slow for experienced programmers that are used to CLI to use
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What does WIMP stand for?
Windows, Icons, Menu, Pointing
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What does WYSIWYG stand for?
What You See Is What You Get
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Why is GUI used more than CLI?
Because it has icons to navigate (which can also be a restriction), it makes usage easier and faster for users
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Where does GUI interface also exist that has become very popular in the last decade?
Touchscreens
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What is used to make a newsletter, flyer or poster?
Desktop publishing software
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What key features would a poster advertising an event include?
The name of the event, time, date, place, names of key people you would see and a brief indication of why you should attend
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How is a newsletter handed out to the audience?
Either handed out or collected by those who want them.
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Who are the audience of a newsletter?
Often a group such as local residents or members of a club or society
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How are flyers handed out?
Often posted through mail or in magazines
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What are the advantages of producing a newsletter, flyer or poster on a computer?
1) Cheap 2) Print as many as needed 3) Previous or different versions can be stored 4) They can be distributed as paper copies or electronically 5) Physical copies can be printed out in different formats
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What are the advantages of producing a newsletter, flyer or poster on word processing software?
1) Correcting errors is quick and easy 2) Can format the document to meet audience needs
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What are the advantages of DTP software?
1) Produces professional-looking pages 2) Frame-based layouts 3) Gives you a selection of publication layouts which are automatically created.
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What are the advantages of a website?
1) There can be, apart from text and images, videos, sound and animation. 2) Buttons and images can encourage the reader to focus on specific aspects 3) Can add a hit counter to monitor the number of visits 4) Can be viewed all around the world
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What are the disadvantages of websites?
1) Can be illegally altered without the knowledge or authorisation of the producer 2) Cannot see a website without Internet 3) Needs to be updated regularly to keep it up-to-date. People expect to see the latest information.
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What are the advantages of multimedia presentations?
1) A good presentation (using sound, animation and video) helps to focus the audience's attention on the key points being made. 2) Presentations can be interactive - links to different slides, information, websites, etc
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What are the disadvantages of multimedia presentations?
1) Cannot present it without a computer and projector - can be expensive 2) If links are used, the presentation will be limited to locations with an internet connection 3) A poorly produced presentation will lose its impact and become boring.
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Card 3

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What are the advantages of CLI?

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Card 4

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What are the disadvantages of CLI?

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Card 5

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What are the advantages of GUI?

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