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Unit 14 Event Driven P1

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Assignment 1

You will be required to complete the following tasks:

Task 1
1.1 Explain the key features of event driven programs [EDP P1]. Event driven programs are used for most modern day software applications, e.g. word processing; spread sheets, drawing packages etc. Event driven programs are usually used for GUI s (Graphical Use Interface),this is where many types of events are generated for example by clicking on a button or another object.

Service Oriented

One of the key features in event driven programming is service oriented; Service oriented programmes are programmes that usually appear in the background. They have no user interface to use but all have the ability to be stopped and started when the users wants. These …show more content…
When the letter "h" is keyed in on the keyboard this action triggers an event which sends a message to the operating system and then the operating system registers the key press as the letter "h".
Printers- The printer can also be an example of how an operating system can be viewed as an event driven application because when the printer wants data for the next page to print the printer and operating system interact to cause an event driven program. Another way the printer does this is when the printer jams and the printer then sends a message to the operating system because the paper jam triggers an event which interacts with the operating system resulting in another event. interactions between the computer hardware and the operating system will give rise to the occurrence of events
Input a CD into the disk drive an event will kick in the event will normally be a menu prompting you to choose an option for the disk
-This can be to play the disk or to take no

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