Oracle JET(OJET) 面试题与答案

问题 11. What are the different Visualization components are available under OJET?

List of the different Visualization components are available under OJET:

• Chart
• Diagram
• Gantt
• Gauge
• Legend
• NBox
• PictoChart
• Sunburst
• Tag Cloud
• Thematic Map
• Timeline
• Treemap
• Use Cases

问题 12. What are the needs OJET fulfills?

Oracle JET is designed to meet the following app needs:

• Add interactivity to an existing page.

• Create a new end-to-end client-side web app using JavaScript, HTML5, CSS, and best practices for responsive design.

问题 13. What do you need to know to learn OJET?

To begin using Oracle JET, you do not need more than the basics of JavaScript, HTML, and CSS. Many developers learn about these related technologies in the process of learning Oracle JET.

问题 14. What is Oracle JET Model-View-ViewModel (MVVM) Architecture?

Oracle JET supports the Model-View-ViewModel (MVVM) architectural design pattern.

In MVVM, the Model represents the app data, and the View is the presentation of the data. The ViewModel exposes data from the Model to the view and maintains the app's state.

问题 15. What are the internal architecture of OJET?

To support the MVVM design, Oracle JET is built upon a modular framework that includes a collection of third-party libraries and Oracle-provided files, scripts, and libraries.

The Oracle JET Common Model and Collection Application Programming Interface (API) implements the model layer. The API includes the following JavaScript objects:

• Model: Represents a single record data from a data service such as a RESTful web service

• Collection: Represents a set of data records and is a list of Model objects of the same type

• Events: Provides methods for event handling

• KnockoutUtils: Provides methods for mapping the attributes in an Model or Collection object to Knockout observables for use with component view models.

To implement the View layer, Oracle JET provides a collection of UI components implemented as HTML5 custom elements, ranging from basic buttons to advanced data visualization components such as charts and data grids.

Knockout.js implements the ViewModel and provides two-way data binding between the view and model layers.