I.C.T Level I Revision

QR CODES
1. QR stands for quick response codes. It gets its name because when it is scanned it can show an image or a web page that it contains.
2. It purpose is simple- it is made to take people to websites or display an image when scanned. The most common way to scan a QR code is to use the application on a mobile phone.
3. They are normally found on packages with links to websites or any place that wants to advertise. It is used because it is an exciting way to show the information and it attracts attention.
PYTHON
1. Python is a coding language that can be used to program events and games. It uses a special text editor called IDLE.
2. A bug is when there is a mistake in the code and causes the application to run incorrectly.
3. There are also operators like a mathematical operator (runs mathematical equations) and a comparative operator (comparing data).
4. Syntax error occurs when a computer fails to run a program because it cannot understand the code applied.
5. A float is a number data-type that can have a decimal.
HTML
1. HTML is another coding language, which stands for Hyper Text Markup Language.
2. Quite a lot of commands in HTML involve using tags with certain meanings.
  1. i = italic
  2. b = bold
  3. u = underline
  4. a = link
  5. body = of text
  6. br = line break
  7. p = paragraph
  8. src = source
  9. ing= image
  10. A variable tag is h1 - h6, which defines the size of the heading with h1 being the biggest.
3. Every tag has to be written like this: <b>. This would make the text bold.
4. HTML's primary use is to make webpages using coding.
CRYPTOGRAPHY
1. The word 'cryptography' originates from the Greek word 'kryptos'.
2. It mainly works by having a message that has to be figured out using some code that hides it. The receiver normally knows the code to find out the message.
3. The SSL or Secure Socket Layer keeps a webpage encrypted so hackers cannot get information. The web address would start with 'https://' and would be green.
4. It has been used before in WW2 to send coded messages.
5. Barcodes count as cryptography and they store The Product ID, Size/Weight of product, Origin or Product, and the Manufacturer.

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	Criado por hemingwaywil mais de 10 anos atrás