Silverlight Interview Questions and Answers for internship

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100 Silverlight Interview Questions and Answers

  1. What is Silverlight?

    • Answer: Silverlight is a discontinued application framework created by Microsoft for cross-platform development of rich internet applications (RIAs). It was designed to deliver interactive media experiences using a plug-in (now obsolete) for web browsers.

  2. What are the advantages of using Silverlight?

    • Answer: Advantages included a rich user experience, cross-platform compatibility (initially), support for multimedia, and integration with .NET framework technologies. However, these advantages are largely irrelevant now that Silverlight is obsolete.

  3. What are the disadvantages of using Silverlight?

    • Answer: Disadvantages included its reliance on a browser plug-in (limiting reach), performance issues compared to native applications, limited access to system resources, and its eventual discontinuation by Microsoft.

  4. Explain the architecture of a Silverlight application.

    • Answer: Silverlight applications run within a browser plug-in (or out-of-browser). They typically consist of XAML (Extensible Application Markup Language) for UI definition and C# or VB.NET for code-behind logic. The runtime environment handles rendering and execution.

  5. What is XAML?

    • Answer: XAML (Extensible Application Markup Language) is a declarative XML-based language used to define the user interface in Silverlight applications. It describes the visual elements, their properties, and relationships.

  6. How does data binding work in Silverlight?

    • Answer: Data binding connects UI elements to data sources. Changes in the data automatically reflect in the UI and vice-versa. It simplifies UI development and data synchronization. Silverlight supports one-way and two-way binding.

  7. Explain the different types of data binding in Silverlight.

    • Answer: One-way binding updates the UI when the data changes, but not the other way around. Two-way binding updates both the UI and data source whenever either changes.

  8. What are controls in Silverlight? Give some examples.

    • Answer: Controls are pre-built UI elements that provide common functionalities. Examples include Buttons, TextBoxes, ListBoxes, Grids, DataGrids, and more.

  9. How do you handle events in Silverlight?

    • Answer: Events are handled by attaching event handlers (methods) to UI elements or other objects. When an event occurs (e.g., button click), the corresponding handler is executed.

  10. What is the role of the Silverlight runtime?

    • Answer: The Silverlight runtime is responsible for rendering the UI, executing the application code, handling events, and managing resources. It acts as the bridge between the application and the operating system/browser.

  11. Explain the difference between a UserControl and a Custom Control in Silverlight.

    • Answer: A UserControl is a reusable composite control built from existing controls. A Custom Control is a more fundamental control built from scratch, offering greater flexibility and customization but requiring more development effort.

  12. How do you handle asynchronous operations in Silverlight?

    • Answer: Asynchronous operations prevent the UI from freezing during long-running tasks. Silverlight utilizes techniques like callbacks, events, and the async/await pattern (in later versions) to manage asynchronous operations.

  13. How do you implement animations in Silverlight?

    • Answer: Silverlight provides a Storyboard system for creating animations. Storyboards define the animation properties (e.g., position, opacity) and their changes over time.

  14. What are some common techniques for optimizing Silverlight application performance?

    • Answer: Techniques include minimizing XAML complexity, using virtualization for large data sets, optimizing image sizes, and avoiding unnecessary layout updates.

  15. How do you handle errors and exceptions in Silverlight applications?

    • Answer: Error handling involves using try-catch blocks to trap exceptions and provide appropriate error messages or recovery mechanisms. The Silverlight runtime also provides mechanisms for handling unhandled exceptions.

  16. Describe your experience with Silverlight development tools and technologies.

    • Answer: [Candidate should detail their experience with Visual Studio, Blend, Expression Design, etc. This answer will vary significantly depending on the candidate's background.]

  17. Explain your understanding of the Silverlight lifecycle.

    • Answer: The Silverlight lifecycle describes the stages an application goes through: initialization, loading, running, and unloading. Understanding this lifecycle is crucial for managing resources and handling events correctly.

  18. How does Silverlight interact with web services?

    • Answer: Silverlight can communicate with web services using technologies like WCF (Windows Communication Foundation) to consume data and functionalities from external services.

  19. What are some common challenges you faced during your Silverlight development projects? How did you overcome them?

    • Answer: [Candidate should provide specific examples of challenges and their solutions. This demonstrates problem-solving skills and experience.]

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