Archives: Theory

Control Systems

A control system is a set of devices that work together to regulate an environment or achieve some set objectives.  This is achieved through a control loop. Examples of control systems: Maintaining healthy conditions in…

Biometrics

Biometrics is a term given to the calculation and use of the measurable physical characteristics of a human. Biometrics is becoming an increasingly popular form of authentication to gain access to restricted computer systems. To…

Computer Misuse Act 1990

The Computer Misuse Act 1990 was created to close a loophole in UK law regarding the intentional malicious use of computers. It is designed to protect computer users against deliberate attacks and theft of information. The…

Testing and Test Data

It is important to test algorithms to check how they perform under a range of conditions. This includes testing any validation you have created to ensure it performs as expected. When creating a testing plan,…

Arrays

An array is a data structure that is capable of storing more than one item of data (value) at a time. To achieve this, each piece of data in an array is given an index…

Uniform Resource Locator (URL)

A uniform resource locator (URL) is the address that is used in the web browser to request a resource (web page) from the world wide web. E.g. http://www.bbc.co.uk/index.html It can be broken down into three…

HTML Structure and Presentation

Web pages are typically created using three components, HTML, CSS and JavaScript. HTML Provides the content and structure of each page CSS A presentation language used to style the HTML content JavaScript A scripting language…

Hypertext Transfer Protocol (HTTP)

HTTP is a protocol (set of rules) used when transmitting files (data) over the world wide web. When you browse the WWW using a web browser, you are using the HTTP protocol. Often, you will…

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