User Interfaces and Their Types: Command-Driven, Menu-Driven, and Graphical, Exams of Software Development

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SOFTWARE

USER INTERFACES

User Interface

 All software has a user interface that is the part of the computer with which you can interact.  The user interface controls how data and instructions are entered and how information is presented on the screen.  All software has a user interface that is the part of the computer with which you can interact.  The user interface controls how data and instructions are entered and how information is presented on the screen.

Command Driven User Interface (CDUI)

 This is a type of user interface, in which the user must enter a command for the computer to execute or work.  The main interfacing device for this user interface is the keyboard.  This is a type of user interface, in which the user must enter a command for the computer to execute or work.  The main interfacing device for this user interface is the keyboard.

An example of a Command Driven User Interface

Disadvantages of the CDUI

 The user has to remember all the commands or keep a user manual. This can be very difficult.  Restricts users to only using the keyboard, while a wide variety of input devices can be used with other user interfaces.  Commands must be entered at a special location on the screen.  The user has to remember all the commands or keep a user manual. This can be very difficult.  Restricts users to only using the keyboard, while a wide variety of input devices can be used with other user interfaces.  Commands must be entered at a special location on the screen.

Menu Driven User Interface

(MDUI)

 This is a type of user interface in which the user selects a command or request from a list.  The main interfacing device for the menu driven user interface is the mouse.  This is a type of user interface in which the user selects a command or request from a list.  The main interfacing device for the menu driven user interface is the mouse.

Advantages of MDUI

 The user does not need to remember commands as they are presented with a list of options.  Free from typing errors because the user does not type commands.  A wide variety of input devices can be used to interface with menu options.  The user does not need to remember commands as they are presented with a list of options.  Free from typing errors because the user does not type commands.  A wide variety of input devices can be used to interface with menu options.

Disadvantages of MDUI

 It is slow because in order to execute a command one has to go through a series of menus.  It is slow because in order to execute a command one has to go through a series of menus.

An example of a Graphical User Interface

Advantages of GUI

 It is user friendly  Reduces typing  Fewer command errors  Icons/symbols are easier to recognize and provide users with context.  It is user friendly  Reduces typing  Fewer command errors  Icons/symbols are easier to recognize and provide users with context.

Activity 1

1. What is the meaning of GUI?
2. What is an icon?
3. What are the types of user interfaces?
4. Which of the user interfaces do you prefer and why?
5. What is the meaning of GUI?
6. What is an icon?
7. What are the types of user interfaces?
8. Which of the user interfaces do you prefer and why?

Activity 2

5 (a) Name the two types of interface which are presented in the figures below: C:/dir Figure 1 Figure 2 5 (a) Name the two types of interface which are presented in the figures below: C:/dir Figure 1 Figure 2