Web services are widely used since the dawn of the internet. When you seek to hire a novice in your company for web service profile, there are a bunch of standard question which could be asked, they are listed below:

• What is Web Service?
Web Service is a software system for communicating two devices over the network.

• How does a Web Service work?
A web service is used to communicate among various applications by using open standards such as HTML, XML, WSDL, and SOAP. You can build a Java-based web service on Solaris that is accessible from your Visual Basic program that runs on Windows. You can also use C# to build new web services on Windows that can be invoked from your web application that is based on Java Server Pages (JSP) and runs on Linux.

• What are the advantages of Web Services?

√ Interoperability: By the help of web services, an application can communicate with other application developed in any language.

√ Reusability: We can expose the web service so that other applications can use it.

√ Modularity: By the help of web service, we can create a service for a specific task such as tax calculation etc.

• What are the different types of Web Services?
There are two types of web services:

√ SOAP

√ RESTful

• What are the main features of Web Services?
Following is a list of main features of web services:

√ It is available over the Internet or private (intranet) networks.

√ It uses a standardized XML messaging system.

√ It is not tied to any one operating system or programming language.

√ It is self-describing via a common XML grammar.

√ It is discoverable via a simple find mechanism.

• What is SOAP?
SOAP stands for Simple Object Access Protocol. It is a XML-based protocol for accessing web services.

• What are the advantages of SOAP Web Services?
√ WS Security

√ Language Independent

√ Platform Independent

• What is WSDL?
WSDL stands for Web Services Description Language. It is an XML document containing information about web services such as method name, method parameter etc.

• What is UDDI?
UDDI stands for Universal Description, Discovery, and Integration. It is an XML based framework for describing, discovering and integrating web services.

• What is RESTful Web Services?
REST stands for REpresentational State Transfer. It is an architectural style. It is not a protocol like SOAP.

• What are advantages of RESTful Web Services?
√ Fast

√ Language Independent

√ Platform Independent

√ Can use SOAP.

√ Allows different data format.

• What is SOA?
SOA stands for Service Oriented Architecture. It is a design pattern to provide services to other application through a protocol.

• What is the advantage of XML in Web Services?
In Web service, an XML is used to tag the data, format the data.