Pearson BTEC Level 3 in Information Technology: Unit 1
Unit 20 Client-side Customisation of Web-pages |
Criteria Covered: P3, M2, D1 |
Assignment looks at: how browsers interpret script, fundamentals of scripting languages, how scripting languages improve functionality. |
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Unit 4: Programming - Assignment 2 & 3 (Learning Aim B & C) (All Criterias met) DISTINCTION EXAMPLE
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Information Technology 2010 QCF
Unit 20 - Client Side Customisation of Web Pages
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Assignment 2 – Client side
Customization of Webpages
Task 1
A scripting language is a programming language that is mostly designed to interact and be used in
conjunction with other programming languages. The most popular scripting languages include
JavaScript, PHP, Python and Ruby. There are many other scripting languages as well, but these are the
most widely used. Because scripting languages are designed to be used with other languages they are
very often used with languages such as HTML and Java. Even though scripts are used in many different
places in programming they are mostly being associated with the World Wide Web now where they are
used a lot to create dynamic Web pages. Even though there are many scripting languages the most
commonly used one when creating web pages is JavaScript.
Event Driven Programming
An event driven program is one where the program is manly based around interactions or user events
and any other inputs of that kind. It is much more focused on the inputs and essentially things happen
when there is some sort of event such as: mouse movement, clicking, button press etc. Event Driven
programming a very popular paradigm since it is user-friendly as it reacts to specific kinds of inputs from
users.
Event Driven programming is a lot better suited for all types of applications that include some sort of
user interaction. It is especially good for graphical user interfaces because it allows for the usage of
many different user interactions such as buttons and text inputs. This makes it essentially the best
paradigm out of the 3 to use when creating GUI and programs that use the Windows Interface.
The downside is that if you are not using event driven programming for creating some that uses the
windows interface it isn’t really a great option. It is essentially only useful for GUI programs and it is also
complex to master. This also means it is not very suitable for small programs as well.
Object Orientated Programing
Object Orientated Programming is a paradigm that is based around the use of object rather than
actions. Objects can be many different things such as humans and animals to buildings and items which
can all be described differently using their appropriate attributes. Objects can be generalized in groups
as classes of objects which defines the sort of data that it contains and any sequences that interact with
it. This concept of data makes it possible to create subclasses within main classes and share the
characteristics between the classes. Classes are also reusable and not only for the program you are
working on but other programs as well. Some examples of Object Orientated programming languages
are: Java, C++, Visual Basic and Ruby.
The Object Orientated approach can be used to create more complex and larger programs unlike
procedural programming. Object Orientated programming is more suitable for creating interactive
applications and GUI’s.
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