#programming interview questions

In 2026, software interviews are no longer about memorizing syntax—they are about how well you think in terms of design, structure, and scalability. This is exactly why OOPs Interview Questions continue to dominate technical interviews for freshers across service-based and product-based companies. Whether you are preparing for your first campus placement or an entry-level developer role,…

programming interview questions

                                                      Figure: - Architecture of WPF

Above figure shows the overall architecture of WPF. It has three major sections presentation core, presentation framework and milcore. In the same diagram we have shown how other section like direct and operating system interact with the system. So let’s go section by section to understand how every section works.

User32 :- It decides which goes where on the screen.

DirectX : - As said previously WPF uses directX internally. DirectX talks with drivers and renders the content.

Milcore : - Mil stands for media integration library. This section is a unmanaged code because it acts like a bridge between WPF managed and DirectX / User32 unmanaged API.

Presentation core :- This is a low level API exposed by WPF providing features for 2D , 3D , geometry etc.

Presentation framework :- This section has high level features like application controls , layouts . Content etc which helps you to build up your application.

Early binding or early bound means the target methods, properties and functions are detected and checked during compile time. If the method / function or property does not exist or has a data type issues then the compiler throws an exception during compile time.

Late binding is opposite of early binding. Methods, properties and functions are detected during runtime rather than compile time. So if the method, function or property does not exist during runtime application will throw an exception.

There is no difference between “x:name” and “name” , “name” is short hand of “x:name”.  But in classes where you do not find “name” property ( this is a rare situations) we need to use “x:name” property.