java web services interview questions
java web services interview questions
In a Java Web Services interview, you can expect questions related to the various types of web services (such as SOAP and RESTful services), their differences, advantages, and use cases. Understanding concepts like WSDL (Web Services Description Language), SOAP (Simple Object Access Protocol), XML (Extensible Markup Language), and JSON (JavaScript Object Notation) is essential. Additionally, questions on frameworks like JAX-RS and JAX-WS, as well as security aspects like authentication, authorization, and encryption in web services, might be asked. It’s also crucial to be prepared for questions on how web services are consumed and deployed, as well as how to handle exceptions and errors effectively.
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1 — What is a web service?
A web service is a software system designed to support interoperable machine to machine interaction over a network.
2) What are the different types of web services available in Java?
The different types of web services available in Java are SOAP (Simple Object Access Protocol) and REST (Representational State Transfer).
3) What is JAX WS?
JAX WS (Java API for XML Web Services) is a Java programming language API for creating web services. It is part of the Java EE platform.
4) Explain the difference between JAX WS and JAX RS.
JAX WS is used for SOAP based web services, while JAX RS is used for RESTful web services.
5) What is WSDL?
WSDL (Web Services Description Language) is an XML based language used to describe the services offered by a web service.
6) How do you create a web service in Java using JAX WS?
You can create a web service in Java using JAX WS by creating a Java class, annotating it with @WebService, and publishing it using an endpoint.
7) What is JAXB?
JAXB (Java Architecture for XML Binding) is a Java API for mapping Java objects to XML and vice versa.
8) What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write and easy for machines to parse and generate.
9) How do you consume a RESTful web service in Java?
You can consume a RESTful web service in Java using libraries like Apache HttpClient or libraries like RestTemplate in Spring.
10) What is the role of annotations in web services development?
Annotations in web services development help to define the behavior of the web service endpoints and operations without the need for complex configuration files.
These are some of the key topics that are covered in a Java Web Services training program for students.
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