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Monday, March 22, 2010

.Net web services interview questions and answers

What is .Net Web Service?
Web service is the way to publish application's function on web that can be accessible to the rest of the world. Web services are the components that can be used by other applications..............

Define SOAP, WSDL, and UDDI.
SOAP, Simple Object Access Protocol is a communication protocol, a way to structure data before transmitting it, is based on XML standard. It is developed to allow communication between applications of different platforms and programming languages via internet..................

Explain the protocols a .Net Web Service uses.
In .Net, a web service is bind with three different protocols such as HTTP/POST, HTTP/GET, and SOAP. This allows client with three options to choose for communication..............

Explain how to document web services.
ASP.NET web services are considered as self documenting as they provides all information about what methods are available and what parameters they require using XML based standard called WSDL.............

Explain when do we required ASP.NET web services.
ASP.NET web services are the great way to expose your middle tier components via internet. These components offer no issue communicating across firewalls as they use SOAP as transport protocols..............

Why do we need Web Services?
We have a number of heterogeneous technologies available on internet. The demand for reusable components across platforms and programming languages are high....................

Explain in brief different distributed technologies.
The need of distributed technologies arises with the requirement of distributed computing applications. The distributed computing allows partitioning of application logic into units and spreading the unit over different................

Web services vs. CORBA and DCOM.
Web services use HTTP protocol for sending and receiving messages between the applications. The data encoding in web services is based on XML...............

Advantages of Web Services
Web Services are supported on a wide range of platforms. Web services may extend its interface and add new methods without affecting the clients as long as they still provide the old methods and parameters................

Explain in brief Web Service Standards.
Following are the standards used by web services: WSDL is used to create interface definition for a web services. It describes all about methods to the client, i.e. methods available in a web service, their parameters and return values..............

Define the specifications that help in the discovery of a web service.
DISCO, an abbreviation of discovery, is a file that groups together a list of related web services. A company that offers web services publishes a DISCO file on its server that has links of all the web services it provides..................

What are the data types supported by web Services?
.Net web services are built on XML-based standards for exchanging data. This means .NET web services can support only those data types that can be recognized by the XML schema standard...............

Testing and consuming a web service
.NET has a test web page that ASP.NET uses automatically when you request the URL of an .asmx file in a browser. This page uses reflection to read and show information about the web services, such as the names of the methods it provides...............

Difference between web service and remoting.net
Both .Net Web services and .Net Remoting are Microsoft solutions for distributed application. Before choosing one of them for application development, let’s identify the differences between these technologies....................

4 comments:

  1. we can use the web services as a middle tier,meanse we can create web services on classes, can we use web services for Structs ?

    On which port does SOAP is running?

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