Essential WPF Interview Questions & Answers for Job Seekers and Freshers
Prepare for your next WPF interview with this comprehensive list of essential WPF questions and answers. Whether you’re a job seeker or a fresher, you’ll find the knowledge you need to ace your interview and land the perfect job
1) What is WPF?
WPF (Windows Presentation Foundation) is a free and open-source graphical subsystem originally developed by Microsoft for rendering user interfaces in Windows-based applications. WPF was previously known as "Avalon", was initially released as part of .NET Framework 3.0 in 2006.
2) List Major advantages of using WPF?
Major advantages of WPF are
- Easier animation and special effects
- Inherent scalability
- Tight multimedia integration
- Hardware acceleration
- Resolution independence
- Easy deployment
- Multimedia and animation with DirectX technology
- HD video playback
- Control rotation
3) What is a Prism in WPF?
Prism is a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, and Xamarin Forms.
4) What is MVVM in WPF?
MVVM (Model-View-ViewModel) is a way of creating client applications that leverage core features of the WPF platform, allows for simple unit testing of application functionality, and helps developers and designers work together with less technical difficulties.
5) What is WPF TextBlock?
A TextBlock control in WPF provides a lightweight control for displaying small amounts of flow content. It is a lightweight text editor control for displaying and formattting small amount of text flow content.
6) What is the value converter in WPF?
A value converter is a class in WPF, that implements the simple interface IValueConverter with the two methods object Convert(object value) and object ConvertBack(object value). It is frequently used with data bindings and used bridge between a target and a source
7) What are dynamic and static resources in WPF?
Dynamic resources: Dynamic resources in WPF are the resources that you can manipulate at runtime and are evaluated at runtime. If your code behind changes the resource, the elements referring to resources as dynamic resources will also change.
Static resources: Static resources in WPF are the resources that you cannot manipulate at runtime. The static resources are evaluated only once by the element which refers to them during the loading of XAML.
8) What are different types of Command in WPF?
There are basically four types of Commands in WPF:
- Application Commands: It includes File Level Commands. For Example File:-> Open
- Edit Commands: It provides editing capabilities.
- Component Commands: It provides a Scroll-up and Scroll-Down type of Command. It is also useful to move to the front of the section of text and move to the End.
- Media Commands: It provides Multimedia type of commands like Play, Pause, etc
9) What is tree view in WPF?
A TreeView in WPF is a view that represents data in a hierarchical view in a parent-child relationship where a parent node can be expanded or collapsed. The left sidebar of Windows Explorer is an example of a TreeView. The TreeView tag represents a WPF TreeView control in XAML.
10) What is Virtualization in WPF?
Virtualization is a technique in WPF that improves the rendering performance of UI elements. By applying virtualization, the layout system ensures that only the visible items of a container are rendered on the screen.
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