What are the differences between GUI and CLI, the importance of layering in DTP, and what is needed for an email to be sent?

Here are the solutions to the questions:

5. Give two differences between a Graphical User Interface (GUI) and a command line interface (CLI):

   • A Graphical User Interface (GUI) uses visual elements like icons, windows, and menus, allowing users to interact with the system using a mouse or touch. A Command Line Interface (CLI) requires users to type text commands to interact with the system.
   • GUIs are generally easier for beginners to learn and use due to their intuitive visual nature. CLIs have a steeper learning curve as users must memorize specific commands and syntax.

6. Explain the importance of layering as used in DTP:

   • Layering in Desktop Publishing (DTP) is important because it allows different elements of a document (such as text, images, and shapes) to be stacked independently on top of each other. This enables users to edit, rearrange, hide, or lock individual elements without affecting other parts of the design, providing flexibility and non-destructive editing capabilities.

7. State two items that an electronic mail should have for it to be sent:

   • A recipient's email address in the "To" field.
   • Content in the message body.

8. State four ways in which you can tell that your computer is invaded by virus:

   • The computer experiences significantly slower performance than usual.
   • Unexpected pop-up windows or advertisements frequently appear.
   • Files are missing, corrupted, or inaccessible, or new, unknown files appear.
   • The computer crashes or freezes frequently, or applications behave erratically.