Computing revision

Computing revision

1. computational thinking

   • computational thinking allows us to take a complex problem, understand, what the problem is and develop possible solution. We can then present these solutions in a way that a computer, a human or both, can understand.

2. abstraction

   • Focusing on the important information only. Ignoring the details that are not needed

3. Decomposition

   • Breaking down a complex problem or system into smaller, more manageable parts.

4. pattern Recognition

   • Looking for similarties among and within problems.

5. Algorithms

   • Developing a step by step solution to the problem, or the rules to follow to solve the problem

6. sequence

   • Following an ordered set of instructions

7. Selection

   • Making a decision within a computer program to decide which instruction to carry out next.

8. input/output

   • An input is data received by a computer.
     • An output is a data sent from a computer

9. connnector

   • connects the flowchart shapes The arrow shows the direction or flow of instruction

10. Decomposition

    • Breaking something into smaller parts

11. Pattern Recognition

    • Looking for similarties and trends

12. File

    • Anything you save. It could be a document, a piece of music, a collection of data or something else.

13. Folder/Sub-folder

    • A place to store files that are related, eg. all of the files relating to one project. Folders help to keep work organised. Sometimes called a directory A sub-folder is a folder inside another folder

14. File Management

    • The organisation of files and folders using suitable names (which gives the identity of a file) and placed into folders.

15. Server

    • A computer that holds data to be shared with other computers. A web server stores and shares websites

16. The protection of data or hardware from unauthorised users.

17. Password.

    • A string of characters used to verify the identity of a user

18. Alphanumeric

    • A mixture of letters and numbers

19. Secure Password

    • A mixture of numbers, letters and symbols at least 8 characters
      • Use of symbols
        • Not easy to guess
          • Example: 01Dl2bB57Ss! "Oh I do like to be beside the seaside!"

20. Non-secure Password

    • Name, pet etc
      • Dictionary words
        • Not complicated
          • Example: 01Dl2bB57Ss! “Oh I do like to be beside the seaside!”

21. Cloud Computing Advantages

    • Backing up - data backed up in the cloud with a reliable provider can be more reliable than storing your information on a hard drive or USB flash memory stick.
      • Compatibility - documents and files are designed to be compatible across different machines and browsers.
        • Compatibility - documents and files are designed to be compatible across different machines and browsers.
          • Cost – the user doesn’t need to buy the latest software as it might be freely accessible through web apps.
            • Independence – the user can work with their files on different computers.
              • Reliable software - web software and browsers are updated online. The user doesn’t have to download the latest updates.

22. Cloud Computing Disadvantages

    • Connection – the user can only access their information if they have a network connection.
      • Copyright – the user sometimes loses legal rights to their original material if they store it online.
        • Security - data stored online is vulnerable to security attacks.
          • Software - web apps do not usually have as many detailed functions as a full software package
            • Storage - it is not always possible to store more than a few gigabytes online with one provider, whereas it is possible to purchase a few terabytes of physical storage to save information at home.

23. Collaborate

    • Sharing documents and working together online. Eg, having a meeting with different people around the world and using the same document.

24. E-safety

    • Do not share personal information (such as your date of birth) Avoid sharing your location on social networks eg snapchat If meeting someone you only know online, do so in a public place and take an adult with you. Don’t troll! (upsetting people online) Change your passwords frequently and avoid using the same password across all accounts