EXTJS Assessment Test

An EXTJS Assessment Test evaluates candidates' proficiency with Ext JS, a JavaScript framework used for building interactive web applications. Ext JS provides a comprehensive set of tools for creating rich, data-intensive user interfaces. The assessment typically covers a range of topics, from basic concepts and components to advanced features and best practices.

A EXTJS Assessment Test evaluates candidates for:

1. Introduction to Ext JS:

• Overview of Ext JS: Understanding the purpose and features of Ext JS for building web applications.
• Architecture: Knowledge of the architecture of Ext JS, including its MVC/MVVM framework and core components.

2. Basic Concepts and Setup:

• Installation and Configuration: Skills in setting up Ext JS in a development environment, including installing the framework and configuring the build process.
• Application Structure: Understanding the basic structure of an Ext JS application, including directories, files, and configurations.

3. Components and Layouts:

• UI Components: Familiarity with Ext JS UI components such as panels, grids, forms, trees, and buttons.
• Layouts: Skills in using and configuring Ext JS layouts (e.g., fit, border, vbox, hbox) to arrange components on a page.

4. Data Management:

• Stores: Knowledge of Ext JS stores for managing and retrieving data, including configuring and using stores.
• Models: Understanding how to define and use models to represent data in Ext JS applications.
• Proxies and Readers: Skills in configuring data proxies and readers for loading and parsing data from various sources.

5. Forms and Validation:

• Form Components: Understanding how to create and manage forms using Ext JS form components.
• Validation: Skills in implementing and configuring validation rules for form fields.

6. Event Handling:

• Event Handling: Knowledge of handling events in Ext JS, including defining event listeners and responding to user interactions.
• Event Delegation: Skills in using event delegation to manage events for dynamically created components.

7. Data Binding and MVVM:

• Data Binding: Understanding data binding techniques in Ext JS, including binding data to components and views.
• MVVM Architecture: Familiarity with the MVVM (Model-View-ViewModel) architecture used in Ext JS for separating concerns.

8. Ext JS API and Extending Components:

• API Usage: Skills in using the Ext JS API to interact with and manipulate components and data.
• Custom Components: Knowledge of creating and extending custom components in Ext JS.

9. Theming and Styling:

• Theming: Understanding how to apply and customize themes in Ext JS applications.
• CSS Styling: Skills in using CSS to style Ext JS components and override default styles.

10. Performance Optimization:

• Performance Tuning: Knowledge of performance optimization techniques for Ext JS applications, including lazy loading and efficient data handling.
• Profiling: Skills in using profiling tools to analyze and improve application performance.

11. Debugging and Troubleshooting:

• Debugging Tools: Familiarity with debugging tools and techniques for identifying and fixing issues in Ext JS applications.
• Error Handling: Skills in implementing error handling and logging mechanisms.

12. Best Practices:

• Development Best Practices: Understanding best practices for Ext JS development, including code organization, component reuse, and maintainability.
• Design Patterns: Knowledge of common design patterns used in Ext JS applications, such as singleton, factory, and observer patterns.

Assessment Formats:

• Multiple-Choice Questions: To test theoretical knowledge of Ext JS concepts, features, and best practices.
• Practical Exercises: To assess hands-on skills in building and configuring Ext JS components, managing data, and implementing features.
• Case Studies: To evaluate the application of Ext JS skills in real-world scenarios, including performance optimization, debugging, and implementing complex UI components.

This assessment ensures that candidates have the necessary skills to effectively use Ext JS for building and managing rich web applications, from initial setup and component design to data management and performance optimization.

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