2.1.1 Identify the different type of user interfaces

Types of user interface

1. Command interface

A command-line interface (CLI), also known as command-line user interface, console user interface, and character user interface (CUI), is a means of interacting with a computer program where the user (or client) issues commands to the program in the form of successive lines of text (command lines).

2.1.2 Identify the basic functions performed by user interface operating system.

Command Line Interface

2. Menu interface

The Menu Interface allows a plugin to add menu items and sub menus to Morays menu. It also handles mapping the IDs in your menu resource so that it doesn't conflict with either Morays menu IDs or those of other plugins.
The menu interface now has an easier way to setup the menu items which super cedes the somewhat cumbersome use of the Get Item Info function.
The new way requires you to not implement any of the functions of this interface. The default implementation automatically builds everything it needs with the macros.

Menu Interface

3. Graphical user interface

User interacts with menus and visual images such as icons and buttons

4. Voice-actuated interface

Which accept input and provide output by generating voice prompts.
The user is made by pressing keys or buttons, or responding verbally to the interface.

5. Web-form interface

Accept input and provide output by generating web pages which are transmitted via the internet and viewed by the user using a web browser program.

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