UNIT V - TEXT EDITORS

1. What is error handler? 

The error handler is used to check if there is an error in the program. If any error, it should warn the programmer by instructions to proceed from phase to phase.

 2. Name some of text editors.

 line editors

 stream editors

 screen editors

 word processors

 structure editors

3. What for debug monitors are used? 

Debug monitors are used in obtaining information for localization of errors. 

4. Mention the features of word processors.

 moving text from one place to another

 merging of text

 searching

 word replacement

5. What are the phases in performing editing process?

 Traveling phase

 Filtering phase

 Formatting phase

 Editing phase

6. Define traveling phase. 

The phase specifies the region of interest. Traveling is achieved using operations such as next screenful, bottom, find pattern.

7. Filtering phase.

 The selection of what is to be viewed and manipulated in given by filtering.

 8. Editing phase 

In this phase, the target document is altered with the set of operations such as insert, delete, replace, move and copy. 

9. Define user interface?

 User interface is one, which allows the user to communicate with the system in order to perform certain tasks. User interface is generally designed in a computer to make it easier to use.

10. Define input device?

 Input device is an electromechanical device, which accepts data from the outside world and translates them into a form, which the computer can interpret. 

11. Define output devices 

Output devices help the user to view the elements being edited and the results of the editing operations. 

12. What are the methods in Interaction language of a text editor?

 Typing –oriented or text command oriented method

 Function key interfaces

 Menu oriented method

13. Define interactive debugging systems. 

An interactive debugging system provides programmers with facilities that aid in the testing and debugging of programs.

 Debugging functions and capabilities

 Relationship with other parts of the system

 User interface criteria.

14. Define editor structure. 

The command language processor accepts input from the users input devices and analyzes the tokens and syntactic structure of the commands. 26. Give the components of editor structure 4 components

 Editing component

 Traveling component

 Viewing component

 Display component

15. What are the basic types of computing environments used in editor’s functions? 

Editor‟s function in three basic types of computing environments

 i. Time sharing 

ii. Stand-alone 

iii. Distributed