WPF Interview Questions and answers Part 2

1.) What is Direct X ?                                                                                                                     
Microsoft has introduced Direct X technology to overcome the drawback of GDI and GDI+ technology. 

• Direct X exploited hardware acceleration.
• It support all animation and 3-D Features.
• It supports full color graphics also.
• It supports media streaming facilities and lot more.
• It provide more supports to game developers.

Direct X Technology launched basically for game programming.It is not used for commercial application.Developers couldn't use for commercial purpose .This is the Biggest Disadvantage of Direct X technology.  
2.) What is Problem of Direct X and its solution ?                                                             

Any Developer couldn't use Direct X technology for commercial purpose.It is only for game programmers. 

   To overcome this drawback Microsoft launch technology on the Top of Direct X ,called Widows Presentation Foundation (WPF).

3.) What is the main purpose WPF ?                                                                                        

 WPF is very power full technology launched by Microsoft which is used for commercial purpose.

4.) What types of application we can build with WPF Technology ?                           

• WPF intended to replace both web forms and windows forms application.Application can be built to run in a browser or a standalone window.
• Windows Forms and web pages/windows can co-exist in a browser or a standalone window.
• One WPF Page/window can have both type of controls on it.
• A New type of web application called XAML browser application XBAP(Formerly web browser application WBA).

5.) What designer tool is used in WPF Technology ?                                                        

• MS Expression Graphics Designer --> ACRYLIC
• MS Expression Interactive designer --> SPARKLE
• MS Expression web Designer --> QUARTZ
• MS Visual studio Designer --> CIDER

6.) What is three main layer of WPF?                                                                                   

•  The Managed WPF API Layer
• 2.) The Media Integration Layer
• 3.) Unmanaged Component Layer(lower level)

7.) What is XAML?                                                                                                                        

• XAML Stands for Extensible Application Markup Language.
• XAML is a declarative XML- based Language that defines objects and their Properties in XML.
• XAML can be used to create visible UI elements in the declarative XAML markup.
• XAML files are xml files that generally represent the .xaml extension.
• XAML is a flexible Language that can be used designing and programming purpose at a time.
• XAML Parser instantiates and writes up the objects using appropriate API and sets their properties.
• If we use XAML with Avalon then Procedural code (code behind) is separate from user interface (UI).
• We can use XAML Language in WPF,SilverLight and WF .NET Technologies.
•   XAML is  Very powerful  binding Technologies.

8.) What is the advantage of XAML?                                                                                        

Graphical designer tools are used XAML language (ex. Blend).

XAML Code is flexible and short.

XAML code is used for designing and Business logic codes.

9.) What are the two main techniques to write the xaml syntax ?                                

1. Property syntax
2. Attribute element syntax

More details...

10.) What is BAML in WPF ?                                                                                                      

• BAML stands for Binary Application Markup Language
• It is the Binary representation of XAML.
• It is more efficient than other.
• BAML is not like Microsoft intermediate Language(MSIL).It is a Compressed declarative format that is faster to load and parse than plain XAML.
•  BAML is just an implementation detail without any direct public Exposure,so it could be replaced with different in the Future.
• BAML is very smaller in size than XAML.