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In WPF, MVVM stands for Model View ViewModel which is an ARCHITECTURAL pattern USED for PRESENTATION Model design pattern. The operational WORKING of MVVM is based on MVC (Model-View-Controller). With the help of MVVM, client applications LEVERAGE the core characteristics of the WPF framework. With the help of this model, developers can build applications with fewer technical difficulties.

In WPF relay COMMAND is used to bind and INTEGRATE COMMANDS DIRECTLY to the properties of VIEWMODEL.

In WPF, resources are the OBJECTS that can be used anywhere in the WPF APPLICATION for customization. In WPF resources are of two types namely-

1. STATIC Resources- These are the resources which cannot be manipulated or modified during RUNTIME. These can be evaluated for once by the implicit ELEMENT which refers during XAML loading.

2. Dynamic Resources- These are the resources which can be manipulated and modified during runtime. These resources can be evaluated during runtime.

WinForms stands for Windows FORMS which is a GRAPHICAL User Interface (GUI). It is a subset of Microsoft .NET mono-framework. It provides a platform for users to develop applications for handheld devices.

WPF stands for Windows Presentation Foundation which is a rendering ENGINE used for the development of INTERACTIVE UI.

WPF stands for WINDOWS PRESENTATION Foundation which is used to create interactive and ATTRACTION applications. It is a vector-based rendering engine that uses hardware-accelerated modern graphic cards.

This is used to create faster, scalable, dynamic resolution-independent and interactive UI.

A1 17 is the SMALLEST recommended virtual machine size for a PRODUCTION ENVIRONMENT.

Service BUS QUEUES in AZURE is a messaging infrastructure which supports service QUEUEING system. Azure can fill the block of the queue by introducing more and advance level of virtualization-based CLOUD services.

The VIRTUAL machine SCALE set in Azure is an identical POOL which is USED to BUILD and configure the virtual machines.

HORIZONTAL scaling- It is a scaling which DEALS with virtualization-based physical resources in which users can scale up and down into the pool of resources.

Vertical scaling- It is ALSO scaling which deals with virtualization-based computing resources such as CPU cycles, RAM in which users can scale up and down into the pool of resources.

There is a total of 3 fault domains in Microsoft Azure

There are four CLOUD computing deployment models namely-

• Public cloud- The cloud is accessible to the GENERAL public.
• Private cloud- It is accessible WITHIN an organization.
• Hybrid cloud- The cloud is a mixture of Public and Private cloud.
• Community- The cloud is accessible by a group of ORGANIZATIONS

Cloud computing provides a means through which USERS can access cloud APPLICATIONS as utilities with the help of the internet. It facilitates users to create, configure, deploy, and customize applications online. Users can access IT computing resources REMOTELY from anywhere without WORRYING about any maintenance and MANAGEMENT costs.

There are a number of benefits of Microsoft Azure-

• Flexibility- Users can ACCESS the resources as per their requirements.
• Agility- It is fast in the context of deployment, scalability, and operations.
• Compliance- It stores data of the users in compliance with rules and regulations.
• Storage- It provides a number of data centers and data repositories for storage.
• Security- The data is protected with the help of a spy-movie environment.
• ANALYTICS support- Azure has built-in analytics support which helps the organizations to proactively analyze the upcoming demand.
• Disaster RECOVERY- The backup of data is maintained.
• Frequent UPDATES- The services that azure provides are highly COMPATIBLE with the existing systems.

Microsoft Azure is a DYNAMIC, flexible, and SCALABLE cloud computing platform which is USED to build, deploy, control and manage applications across the cloud. It provides four types of services namely application services, computing services, DATA services, and network services. Users can use Azure cloud services as per their costing model (Pay-as-you-go). Users will NEED to pay for the services that they have used.

WCF SERVICE handles new about 40 requests and WCF handles each request with the help of CALL which implies that one INSTANCE of WCF service will be created for each request.

There are DIFFERENT TYPE of BINDING in WCF namely-

• BasicHttpBinding
• WSHttpBinding
• WSDualHttpBinding
• WSFederationHttpBinding
• NetTcpBinding
• NetNamedPipeBinding
• NetMsmqBinding
• NetPeerTcpBinding

Yes, we have method overloading in WCF. In the general method, overloading is one of the optimal features that allow the users to create multiple methods with the same name but each method performs DIFFERENT functionality from each there in the context of INPUT and OUTPUT. In other words, method overloading methods name will be the same but the parameters differ from each other. Method overloading is used during compile TIME polymorphism.

In practice, HTTP binding is suitable for communicating securely with ASP.NET Web service (ASMX) based services. In addition to this, WCF services use HTTP binding service in ORDER to transport text/XML ass a default message.

In order to CREATE HTTP binding in WCF following steps need to be performed

• Create WCF HttpBinding project
• Open Visual Studio
• Create a New Project from the start page
• Go to File menu, select New and then click on the project
• A dialog box will POP up over the display screen
• With the help of installed templates select C#
• Inside C# select WCF and then select WCF service application

KnownTypeAttribute is an ATTRIBUTE which allows specifying the types that should be included during the process of DESERIALIZATION. The users are using KnownTypeAttribute only when they want to accept the SERVICE and RETURN an INHERITED type.

In general exception handling is one of the FEATURES of object programming language and it is an error that accurate which occurs runtime. Exception handling is a technique which is used to handle runtime errors. In order to handle expectations TRY, catch and FINALLY block are used. Id the expiration handling technique is unable to handle the runtime error then the execution of the application automatically terminated.

There are THREE ways of handling exception in WCF

• Faultexception
• IErrorHandler
• returnUnknownExceptionAsFaults

After creating a WCF service, it is important to HOST the DESIGNED service so that client APPLICATIONS can USE it. Additionally, WCF services can be HOSTED with the help of four ways namely- ISS (Internet Information Service) hosting, Self-hosting, WAS (Windows Activation Service) hosting, Windows Service Hosting.

A data contract is a FORMAL agreement which is held between the client and service provider in which the data exchange METHOD is EXPLICITLY defined. ADDITIONALLY, with the help of data contract, the data is serialized and can be exchanged AMONG two different entities.

Endpoints in WCF service is used for the purpose of establishing COMMUNICATION between endpoints of the services. With the help of endpoints, users can ACCESS the offered FUNCTIONALITIES of the WCF services.

• An address which is used to find the endpoint.
• The binding which specifies how the client can establish communication with the endpoint
• A binding that specifies how a client can communicate with the endpoint.
• A contract is used for the identification of operational variable
• A set of behaviors that specify and states implementation details of the endpoint.

• Impersonate
• ServiceAccount
• OAuth
• Static
• Single Single-on

In general, WCF is an advanced level programming platform which is used for building, running and DEPLOYING application over distributed network services. Address finding in WCF is a technique which is used for binding the LOCATION address and TRANSPORT address which is used for the establishment of communication with two peers.

Massage contract in WCF is used to define the structure of data. It is important to define the structure of data before the application sends the packet from SOURCE to destination. In addition to this, the message contract is also used to CONTROL and MAINTAIN the structure of INFORMATION (Message body) and serialization of process.

Volatile letter QUEUES- This is a QUEUE which is used when you send information or message and WANT that message to be delivered on the proper TIME.

Dead letter queues- This queue is REQUIRED so that client and server are not needed to run at the same time when the message is delivered.

Throttling is a word which is derived from THROUGHPUT keyword, it means work performed WITHIN the specific intervals of time. The throttling behavior in WCF is DEFINED as a number of session user CREATES within a stipulated period of time.

Duplex in WCF allows CLIENTS and server to establish a communication pathway with each independently in which any of the entity can initiate a call to others. In order to establish communication between the SOURCE and destination duplex mode of communication would be used. If one entity is sending a message at the time another entity will receive the message. Moreover, in the duplex mode of communication, both source and destination will participate in the communication ACTIVITY.

WCF is an abbreviated form of Windows Communication Foundation. In general, it is WIDELY used to CREATE and generate the interoperable, scalable and distributed application. .NET 3.0 is a WCF applications framework which is used for the creation of service-oriented and aligned applications. With the help of this framework, users can send asynchronous data from one PART to another.

Therefore, WCF applications can be used in a distributed system that can be run on multiple SYSTEMS without any sort of compatibility barriers.

$PSScriptRoot is an Automatic Variable, which are built-in variables that comprise records about the POWERSHELL surroundings itself. $PSScriptRoot INCLUDES the listing direction of the SCRIPT being DONE currently.

Originally $PSScriptRoot used to be solely relevant to script modules, however commencing with PowerShell 3.0, it WORKS for all PowerShell script files. From the console, if I kind $PSScriptRoot and press ENTER, it returns nothing.