Interview Questions.

Question 1. What Is Xaml Namespace?

Answer :

Namespace may be defined as an environment or an abstract field used to maintain a logical grouping of specific identifiers or symbols.

Question 2. How Custom Classes Used In Xaml Can Be Defined?

Answer :

Custom classes are utilized in  ways:

With the code that produces the Primary Windows Presentation Foundation (WPF) utility or in the code in the back of.
In a separate assembly as a category, which include an executable or DLL used as a class library.
C#. NET Interview Questions
Question 3. Explain What Is The Use Of Property Element Syntax?

Answer :

With the help of property element syntax, you may add youngsters detail with a name within the form of parent.PropertyName.

Question four. Explain What Is The Function X: Key Directive In Xaml?

Answer :

X: Key uniquely identifies elements that are created and referenced in an XAML defined dictionary. By including an x: Key price to an XAML item element a resource in the useful resource dictionary can be identified and is the maximum common manner to identify.

C#. NET Tutorial
Question five. Explain How You Can Display Different Data At Run Time And Design Time?

Answer :

One manner of displaying records at run time and design time is to declare your data in XAML.
Another manner of doing it's far by way of asserting it in XAML via the usage of numerous statistics attributes from the designer XML namespace.  With a d: prefix, this namespace is usually declared.

Xmlns: d= http://schemas.Microsoft.Com/expression/blend/2008

ASP.NET Interview Questions
Question 6. What Is Data Binding With Xaml?

Answer :

Data binding offers a easy way to show and engage with data. An instance will display how you can do records binding in XAML.  The binding in XAML is accomplished through the use of binding…. Syntax.

Question 7. What Should A Root Element Of An Xaml Document Contain?

Answer :

In XAML document, the basis detail consists most effective positive elements, and those factors are Window, a Canvas or panels.

ASP.NET Tutorial Advanced Dot Net Interview Questions
Question eight. What Are The Ways You Can Declare Objects In Xaml?

Answer :

To claim objects in XAML, there are three ways:

Directly, the usage of item element syntax: This syntax is used to declare root items or nested items that set property values
Indirectly by the use of characteristic syntax: This syntax makes use of an inline string price which has an instruction on how to create an object. To set the cost of the property to a newly created reference, the XAML parser uses this string
Using a markup extension.
Question nine. Explain Object Element Syntax In Xaml?

Answer :

To instantiate a CLR magnificence or shape with the aid of maintaining an XML detail, an XAML markup syntax is used.  This syntax is referred as Object Element Syntax.

OOPS Interview Questions
Question 10. Explain What Is Type Converter?

Answer :

The kind converter is useful to transform a string into the best value kind where there is no markup extension usage.  Type Converter defines 4 participants for changing to and from string for xaml purposes.

CanConvertTo
CanConvertFrom
ConvertTo
ConvertFrom
MVC Framework Tutorial
Question 11. What Are The Types Of Children Does Object Element Can Have In Xaml?

Answer :

Three forms of youngsters an object element can have:

Collection Items
A cost for the content material assets
The price that may be type-converted to the item detail
MVC Framework Interview Questions
Question 12. How Can You Set A Property Attribute As A Literal String And Not A Mark Up Extension?

Answer :

To keep away from mark up extension you need to use an empty pair of curly braces like

Content = “ This isn't always a markup extension”/>

C#. NET Interview Questions
Question 13. What Are The Various X: Prefix Used In Xaml Language?

Answer :

x: Key à It units a unique key for every aid in a Resource Dictionary
x: Classà It specifies the CLR ( Common Language Runtime) namespace and class name for the magnificence that offers code
x: Name à It specifies a run-time item name for the instance that exist in run time code after an item detail is processed
x: Static à It enables a reference that returns a static value which otherwise an XAML compatible belongings
x: Type à It constructs a Type reference based totally on the sort call
MVVM Tutorial
Question 14. What X: Prefix Indicates In Xaml?

Answer :

The X: prefix is used to map the XAML namespace in templates.

Question 15. What Are The Four General Kinds Of Xaml Elements?

Answer :

The 4 standard kind of XAML elements are:

Root Elements
Panel Elements
Control Elements
Geometric Elements
MVVM Interview Questions
Question sixteen. Explain What Is Markup Extension In Xaml?

Answer :

Markup extensions are placeholders in XAML that are used to clear up belongings at runtime. A markup extension permits you to extend XAML and the usage of characteristic syntax you may also set any belongings that can be set in XAML.The motive of the mark up extension is to procedure a string and go back an object. Some of the same old markup extensions are xNull, x: Array, :StaticResource  and DynamicResource.

Windows Communication Foundation (WCF) Tutorial
Question 17. Explain Content Properties Xaml?

Answer :

XAML represents a language characteristic wherein a class can allot exactly one in all its homes as XAML assets

Windows Communication Foundation (WCF) Interview Questions
Question 18. What Is Attribute Syntax In Xaml?

Answer :

In XAML, characteristic syntax sets a price for a assets or names the occasion handler for an occasion, via affirming an attribute on an detail.The characteristic cost ought to be enclosed inside two citation marks (“).

For example,

< Button Background = “Black” Foreground “Red” Content = “This is an operating button”/>
XAML

ASP.NET Interview Questions
Question 19. In Xaml How Graphic Components Are Specified?

Answer :

In XAML, picture components are targeted with by means of open or closed tags with attributes.

For example,
Tag with contents
<Button>
Click
</Button>
Tag without contents
< Button/>

XAML Tutorial
Question 20. How Can You Code To Display “whats up World” In Xaml?

Answer :

Displaying “Hello World.”

<page xmlns= ‘’ ‘’>
<TextBlock>
Hello, World!
</TextBlock>
</Page>

Dot Net Framework Interview Questions
Question 21. Mention The Advantage Of Using Xaml?

Answer :

The benefit of the usage of XAML is:

XAML code is clear to study, and they are brief
Separation of dressmaker code and common sense
Tools like expression mixture used for graphical layout require XAML as source
It virtually separates the roles of fashion designer and developer
Question 22. Explain What Is Xaml? What Is The Difference Between Xml And Xaml?

Answer :

XAML stands for eXtensible Application Markup Language. It is the language used to instantiate.NET objects.  It is the language advanced by means of Microsoft to write down person interface for subsequent technology packages.

XML is designed to store information or to work with the saved information, whereas XAML is the extended model of XML used for.NET programming.

Question 23. Which Namespace Has ‘popup’ And ‘thumb’ Controls?

Answer :

The namespace gadget.Windows.Controls.Primitives has ‘Popup’ and ‘Thumb’ controls.

Advanced C# Interview Questions
Question 24. State The Name Of The Classes, Which Contain Arbitrary Content?

Answer :

Content Control
HeaderedContent Control
Items Control
HeaderedItems Control
Advanced Dot Net Interview Questions
Question 25. How Can Command-line Arguments Be Retrieved In A Wpf Application?

Answer :

The maximum preferred technique for that is to call System.Environment.GetCommandLineArgs at any random factor in the software.

Question 26. How To Get Automation Ids Of Items In A Itemscontrol?

Answer :

The nice manner to do that is by means of setting it Name belongings as it's far utilized for automation functions through default. But in case you require to present an ID to an detail, other than it’s call, then the AutomationProperties.AutomationID assets can be set as in keeping with want.

XAML Interview Questions
Question 27. Why Is It Better To Wrap Items In Combobox Item?

Answer :

It has a few vital properties like IsSelected and IsHighlighted and also a few important activities like Selected and Unselected. ComboBoxItem is a content manipulate and is for this reason very useful for adding easy strings to a ComboBox.

OOPS Interview Questions
Question 28. What Are The Different Kinds Of Routed Events In Wpf?

Answer :

There are 3 types of Routed occasions in WPF.

They are:

Direct – This occasion can most effective be raised by using the element in which it was originated.
Tunneling – This event is first raised via the detail in which it was originated after which it receives raised by using every consecutive field in the visual tree.
Bubbling – This event is first raised via the uppermost field inside the visible tree after which gets raised through each consecutive container mendacity under the uppermost one, till it reaches the element it wherein it was originated.
Question 29. Can Windows Service Be Created Using Wpf?

Answer :

No, Windows Services can't be created the usage of WPF. WPF is a presentation language. Windows offerings want specific permissions to execute some GUI associated functions. Therefore, if it does no longer get the desired permissions, it offers errors.

Win32 Api Interview Questions
Question 30. Where Does The Execution Start In A Wpf Application?

Answer :

WPF packages created in Visual Studio run with out a Main technique. This is because the programs are unique-cased when they are compiled from XAML. That approach, Visual Studio attaches a Build Action of ApplicationDefinition to the XAML document. This effects inside the vehicle technology of a Main technique.

Question 31. How Can Listbox Be Made To Scroll Smoothly?

Answer :

ListBox is configured to scroll on an item-by-object foundation by using default. This is depending on the height of every element and the scrolling motion, for this reason, giving a hard feeling. Better manner is to configure scrolling action so that it shifts items by means of a few pixels regardless of their height. This is carried out by using setting the ScrollViewer.CanContentScroll assets to “fake”. This will, however, make the ListBox lose the virtualization assets.

Question 32. How To Make A Tooltip Appear While Hovering Over A Disabled Element?

Answer :

For this motive, the ShowOnDisabled belongings can be used. It belongs to the ToolTipService magnificence.

Basic C Interview Questions
Question 33. In What Sense Are Wpf And Silverlight Similar?

Answer :

Silverlight and WPF are similar within the experience that they each use XAML and share the identical code, syntax and libraries.

MVC Framework Interview Questions
Question 34. What Is Xbap?

Answer :

XBAP is the abbreviated form of XAML Browser Application. It lets in WPF programs to run inner net browsers. Installation of .NET framework on the customer device is a prerequisite for going for walks WPF applications. But hosted packages are not given complete admission to the patron’s device and are finished in a sandbox surroundings. Using WPF, such applications can also be created, which run without delay within the browser. These programs are referred to as XBAP.

Question 35. Is Mdi Supported In Wpf?

Answer :

MDI is not supported in WPF. UserControl can be used to offer the equal functionality as MDI.

Question 36. Explain Serialization?

Answer :

It is the procedure of converting the state of an item to movement of bytes.

MVVM Interview Questions
Question 37. What Is An Adorner?

Answer :

They are a special sort of FrameworkElement that provide visible clues to the consumer. They also are used to feature handles to factors and supply facts approximately the state of a manipulate. Adorners are bound to the UIElement and are rendered on a surface that lies above the detail, that's embellished. This surface is referred to as an AdornerLayer. Adorners are in most cases located distinctly to the bounded detail.

Question 38. What Is The Unit Of Measurement In Wpf?

Answer :

All measurements are made in device-impartial pixels, or logical pixels. One pixel is 1/96th a part of an inch. These logical pixels are continually mentioned as double, this enables them to have a fractional fee too.

Question 39. What Is The Way To Determine If A Freezable Object Is Frozen?

Answer :

“IsFrozen” assets of the object can be used to determine if the freezable item is frozen.

Question 40. Write About Usercontrol In Brief.?

Answer :

UserControl wraps present controls right into a unmarried reusable institution. It consists of a XAML file and a code. UserControl can not be styled or templated.

Windows Communication Foundation (WCF) Interview Questions
Question 41. Why Are Layout Panels Needed For In Wpf?

Answer :

Layout Panels are wanted in order that the controls fit monitors of different sizes or having exceptional font sizes. If we arrange controls on fixed pixel coordinates, then this version will fail while moved to a exclusive surroundings. For this cause, Layout panels are important.

Question 42. Explain Mvvm Pattern?

Answer :

MVVM pattern divides the UI code into three basic components:

Model – It represents a hard and fast of instructions, which include information received from databases.
View – It is the code that is of the same opinion with the visual illustration of the statistics.
ViewModel – It is the layer that binds View and Model together. It affords this data in a way, which is easy to recognize. It additionally controls how View interacts with the application.
Dot Net Framework Interview Questions
Question 43. Write The Differences Between Dynamicresource And Staticresource.

Answer :

The maximum simple distinction is that StaticResource evaluates the useful resource one time best, but DynamicResource evaluates it whenever the resource is required. And because of this motive, DyanamicResource is heavy on the gadget however it makes pages or home windows load faster

Question forty four. What Is The Method To Force Close A Tooltip, Which Is Currently Visible?

Answer :

It can be closed through putting the tooltip’s IsOpen property to fake.

Question 45. What Is The Basic Difference Between Events And Commands In The Mvvm Model?

Answer :

Commands are greater effective and are advantageous to use instead of events. Actions are deeply connected with the occasion supply and, consequently, the activities can't be reused easily. But commands make it feasible to correctly keep more than one actions at one region after which reuse them as according to our requirement.

Question 46. What Is The Inotifypropertychanged Interface?

Answer :

The InotifyPropertyChanged notifies customers, typically folks who are binding, if the fee of a belongings gets modified. It has an event, called PropertyChanged, which receives raised everytime a belongings of Model object is changed.

Question forty seven. What Are Attached Properties In Wpf?

Answer :

Attached houses are essentially Dependency Properties that permits the attachment of a fee to any random object.

Question 48. What Is Difference Between Page And Window Controls In Wpf?

Answer :

The basic difference is that Window Control presides over Windows Application at the same time as Page Control presides over the hosted Browser Applications. Also, Window manipulate may also incorporate Page Control, however the opposite cannot show up.

Question forty nine. What Does Baml Mean In Wpf?

Answer :

BAML is the abbreviation for Binary Application Markup Language. It is nothing but XAML that has been tokenized, parsed and changed into binary shape. BAML is a compressed declarative language, which receives loaded and parsed faster than XAML.

Question 50. Name The Important Subsystems In Wpf?

Answer :

The predominant subsystems are:

Windows.Controls.Control
Windows.DependancyObject
Windows.FrameworkElement
Windows.Media.Visuals
Object
Threading.DispatcherObject
Windows.UIElements
Question 51. What Are The Various Layout Panels In Wpf?

Answer :

They are:

Stack Panel
Grid Panel
Canvas Panel
Dock Panel
Wrap Panel
Question fifty two. How Is System.Windows.Media.Visible Dll Utilized In Wpf?

Answer :

It is used on every occasion a demand for growing custom consumer interface arises. It is a drawing item, which offers instructions for making an object. These commands include opacity etc. Of the drawing. The Visual elegance also bridges the functionalities of WPF managed classes and the MilCore.Dll.

Question fifty three. Explain Routed Events In Wpf?

Answer :

An event, which can invoke handlers on multiple listeners present in an detail tree, in preference to the single object which known as the occasion, is referred to as a Routed occasion.

Question fifty four. How Is Mvvm Different From Mvc?

Answer :

MVC stands for Model-View Controller and.MVVM stands for Model-View ViewModel.

In MVVM, View Model is used in preference to a controller. This View Model is gift underneath the UI layer. It exhibits the command items and statistics that the view calls for. It acts like a field object from which view gets its actions and information.

Question fifty five. How Can Elements In A Listbox Be Sorted?

Answer :

Sorting can be achieved with the aid of the use of a property of the ItemsCollection item. ItemsCollection includes an attribute, SortDescriptions, which holds System.ComponentModel.SortDescription instances. Every SortDescription example defines how the factors need to be taken care of and suggests if the sort is descending or ascending.

For example, this code kinds factors of ContentControl on the premise of their word rely property:
myItemsControl.Items.SortDescriptions.Add(new SortDescription(“WordCount”, ListSortDirection.Descending));

Question fifty six. What Are The Types Of Windows In Wpf?

Answer :

WPF has three sorts of home windows:

Normal Window
Page Window
Navigate Window
Question 57. Can Wpf Applications Be Made Without Xaml?

Answer :

Yes WPF applications may be created with out XAML as the use of XAML in WPF is an issue of desire.

Question 58. Define Path Animations In Wpf?

Answer :

Path animation is a type of animation in which the lively object follows a path set with the aid of the Path geometry.

Question fifty nine. Name The Common Assemblies Used In Wpf?

Answer :

PresentationFoundation
WindowsBase
PresentaionCore
Question 60. Describe Custom Control Briefly?

Answer :

Custom Control widens the features of current controls. It includes a default fashion in Themes/Generic.Xaml and a code record. It is the best manner to make a manipulate library and also can be styled or templated.

Question sixty one. Is It Possible To Use Windows Forms In A Wpf Application?

Answer :

Yes, Windows form may be utilized in WPF. Windows form can seem as a WPF pop. The controls of this Window form can be placed besides WPF controls in a WPF web page via making use of the capabilities of the WindowsFormsHost manipulate that comes preinstalled.

Question 62. Write About Prism?

Answer :

PRISM is a framework for developing complicated programs for WPF, Silverlight or Windows Phone. PRISM utilizes MVVM, IC, Command Patterns, DI and Separation of Concerns to get loose coupling.

Question 63. Name The Methods Present In The Dependencyobject?

Answer :

It has 3 items, specifically:

SetValue
ClearValue
GetValue
Question sixty four. How Is Silverlight Different From Wpf Browser Application?

Answer :

One of the fundamental variations is that .NET framework is required for jogging WPF browser programs on the client device. But Silverlight runs the use of only the plug-in. Another point of difference is that packages made in WPF depend on the OS as .NET Framework only runs on Windows. On the opposite hand, the Silverlight plug-in may be hooked up on those OSs additionally, which are not Windows.

Question 65. Why Should Wpf Be Preferred Over Adobe Flash?

Answer :

WPF is a extra recent technology and therefore has the trendy improvement gear. It supports a broader variety of programming languages and has a robust manipulate reuse.

Question sixty six. What Are Freezable Objects In Wpf?

Answer :

An item, which has its state locked down, in order that it turns into unchangeable, is referred to as a freezable object. Such gadgets perform higher. It is also more secure if they are required to be shared between threads.

Question 67. How Can The Size Of Statusbar Be Increased Proportionally?

Answer :

By overruling the ItemsPanel attribute of StatusBar with a grid. The grid’s columns may be correctly configured to get the preferred end result.

Question sixty eight. What Are Dependency Properties?

Answer :

Properties that belong to a selected elegance but can be used for some other are referred to as the dependency residences.

Question 69. Is It Right To Say That Wpf Has Replaced Directx?

Answer :

No, WPF can by no means replace DirectX. WPF cannot be used to create games with stunning pictures. WPF is supposed to be a substitute for home windows shape, no longer DirectX.

Question 70. Name The Namespace Required For Working With 3d?

Answer :

The namespace required for running in 3D is System.Windows.Media.Medi3D.

Question 71. What Are The Types Of Documents Supported By Wpf?

Answer :

Two forms of the documents supported via Windows Presentation Foundation (WPF) are the Flow layout and fixed Format file. Flow layout report alters the content to in shape the display screen length while fixed format document gift content irrespective of the display length.

Question seventy two. What Is Wpf?

Answer :

WPF is the contemporary presentation API by Microsoft Windows. It is 2D and 3D image engine.

Its talents include:-

All the common person controls. For instance, test containers, buttons, sliders and so on.
Supports waft and connect layout documents
all of the functionality of Flash and HTML
Data binding
Multimedia