Wpf Developer Interview Questions and Answers

Explanation of C# and WPF concepts and XAML related questions.

• C# concepts include OOPs, delegates, and static classes.

• WPF concepts include binding, singleton pattern, and commands.

• XAML related questions include resources, types of binding, and one-way vs two-way binding.

• Resources in WPF are objects that can be shared and reused throughout an application.

• Types of binding in WPF include one-way, two-way, and one-time binding.

• One-way binding updates the target property when the ...read more

Explanation of interface and abstract class with examples.

• Interface is a contract that defines the behavior of a class.

• Abstract class is a class that cannot be instantiated and can have both abstract and non-abstract methods.

• We use interface and abstract class to achieve abstraction, polymorphism, and code reusability.

• Example of interface: IDisposable interface in C#.

• Example of abstract class: Animal class with abstract method 'makeSound()'.

Static and dynamic resources, Nullable, ArrayList and Array differences

• Static resources are defined at compile-time and cannot be changed at runtime, while dynamic resources can be changed at runtime

• Nullable is a data type that can hold either a null reference or a value of the specified type

• ArrayList is a non-generic collection that can hold objects of any type, while Array is a fixed-size collection that can hold elements of a specific type

WPF applications can be deployed using ClickOnce or Windows Installer.

• Create a deployment package using Visual Studio

• Choose the appropriate deployment method (ClickOnce or Windows Installer)

• Publish the application to a server or create an installer package

• Ensure that all required dependencies are included in the deployment package

• Test the deployment on target machines

A resource is an object that can be reused throughout an application, such as styles, templates, and data.

• Resources are defined in XAML and can be accessed by name

• They can be used to define styles, templates, and data bindings

• Examples include brushes, fonts, and images