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The purpose of lossless compression is to reduce the amount of storage space needed to save some information, without losing any information hence without losing quality. Lossless compression can be used to store text-based information in a more effective way.…
Domain Name Servers (DNS) are the Internet’s equivalent of a phone book. They maintain a directory of domain names and translate them to numerical IP addresses. These IP addresses are used to identify and locate the web-servers on the Internet…
A barcode is an optical, representation of data that can easily be scanned by a barcode reader. A barcode is used to store a number such as the product code of a product for sale in a shop, or the…
A lot of computer systems rely on the need for the user to login using a username and password. This form of authentication is used to uniquely identify a user and give them access to the relevant information on the…
– Online Database – – SQL Activities – Feeling confident with your computing knowledge of Relational Databases? Spend a few minutes to answer or research the following questions: ? What are tables used for in a relational database? ? How…
Our aim is to use the BBC micro:bit to create an automated Car Park Display to inform drivers of the number of empty spaces left in a car park. Our system should: Be initialised with the number of available spaces…
In cryptography, a Caesar cipher, also known as shift cipher, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter…
Imagine a building with 8 rooms. Each room is fitted with a card reader used to give access or not to different members of staff. Each member of staff has a card giving them access to some of the rooms.…
When designing a website, you have to consider the different sizes of screens of your internet users. These may access your website using a computer (desktop/laptop), a tablet, a smartphone, a smart TV… A responsive website is a website where…
When formatting text on a webpage, you will more likely want to use different types of fonts. You may be tempted to use fonts that are installed on your own computers. However, you need to be careful as there is…
LMC Simulator
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