#wcf training

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QuestPond’s Interview Questions & Answers on WCF (Windows Communication Foundation)

What are the different Security modes available in WCF (Windows Communication Foundation)?

There are three different Security modes available in WCF (Windows Communication Foundation)

Message – here Message itself get encrypted and signed. By default authentication option are windows but supports wide variety of client credentials including customer UserName and Password validation. It will be slower in performance, but support for wide variety of client credentials makes it a good option too.

Transport – here Message will be transferred as a plain text but the transport which passes that data will be secured. In this mode binding leverages the security feature provided by transport like SSL. Its good performance makes it a better option but less support for different client credentials makes it bad choice.

Mixed – This is a mode where advantages of both the world will be used. Data will be protected with the help of transport and thus providing better performance plus supports wide variety of user credentials.

For technical trainings on various topics like WCF(Windows Communication Foundation), MVC, Business Intelligence, Design Patterns, WPF, TFS and Basic fundamentals feel free to contact [email protected] or visit www.sukesh-marla.com For more stuff like this, click here. Subscribe to article updates or follow at twitter @SukeshMarla

See following video on create the service using WCF (Windows Communication Foundation): -

Click and see here for more WCF(Windows Communication Foundation) step by step training.

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QuestPond’s Interview Questions & Answers related to instancing in WCF

What is instancing in WCF?

WCF Instancing let us control the instance creation behavior of the service. It simply describes how many objects should be created of a service.

Confused!!!! Here one may ask a question. “We are the one who create the object in the client side that means we have complete control over object creation, then how this is different from WCF instancing?” Well, let’s understand this. We won’t create the object of service in client side. If you think properly then you will realize that we create the object of service proxy class (generated at the client place, when we say add reference). We use this object and invoke service methods. In that very moment at server side service instance get created. WCF instancing let us control this object creation behavior.

Instancing modes

There are three modes of instancing available: -

Per call – With every service call one instance will be created.

Per instance –for one proxy object one instance will be created

Single – Only one object will be created throughout.

See the following video on REST (Representational State Transfer): -

Click and see here for more advanced training in .NET.

[questpond]

QuestPond: Interview Questions and Answers on learning WCF (Windows Communication Foundation)

Explain the basic steps required for creating WCF Service?

1. Create the service

          I. Crate the service contract

         II. Create the operation contract

         III. Implement the service contract

2. Create the endpoints

3. Enable metadata

4. Expose metadata via mex binding or via http get request

5. Host the service

While creating endpoint what all things we need to do?

We have to define the ABC of a service.

A – Address – Where we get the service

B – Binding – How to get the service

What protocol should be used?

What encoding will be used?

What security will be applied

C – Contract –What will be exposed to client.

What data types will be available for clients?

What methods (service methods) he is going to get etc.

For technical trainings on various topics like WCF, MVC, Business Intelligence, Design Patterns, WPF, TFS and Basic fundamentals feel free to contact [email protected] or visit www.sukesh-marla.com

For more stuff like this, click here. Subscribe to article updates or follow at twitter @SukeshMarla

See following video on WCF (Windows Communication Foundation) Concurrency & throttling: -

Click and see here for more stuffs complete learning guide for WCF(Windows Communication Foundation).