Transcript Document
Chapter 2 • This presentation covers the following: – Command Line – Forms – Menus – Natural Language • Makes use of a command prompt. • The user must know what the commands are and what they do in a lot of detail. • They are mostly used by expert users such as Network Administrators. • As the computer can be controlled directly it can sometimes cause problems if a user makes a mistake. The command ipconfig shows the details of your network connections. • Many commands have switches which allow users to do different things. • The previous screenshot showed what happens when ipconfig is typed in. • ipconfig /all provides further information. • Forms allow users to input data into a system. • They are used when we know what kind of data we want to input. • They can provide context-based assistant and can be used to ensure that ‘bad’ data does not enter a system through use of validation rules and verification checks. • They also provide an interface which stops the user from entering information, asks a question and awaits a response before allowing the user to continue. • Menus store instructions in a logical order. • They are usually found in toolbars in application software but can also be found when right clicking on a PC mouse. • They are often cascaded and follow a path to an instruction – usually within a certain context e.g. Save and Print can be found under File. • Natural Language interfaces allow the user to use their own language to communicate with a computer. • Two types include: – Spoken – Written • Voice recognition can be used to input instructions into a system. • Written words can be used to perform specific instructions in a system. • The game End War will allow users to input instructions into the game through voice commands. • Certain websites and help files allow you to type in questions to get answers. • Those of you who have watched Star Trek will know that the crew of the Enterprise were able to ask the computer a question and the computer was able to understand them. • We are a long way off from that but technology is getting closer. • Eventually everyone, no matter on ability, will be able to use ICT through a natural language interface. • Describe three advantages of using a command-line interface. • Where would the use of a forms interface be appropriate. • What are the disadvantages of a natural language voice interface. • Describe three characteristics of a menu interface.