We all know how important web services are. Without them facilitating machine to machine communication, there’d be no way for computers to give us wonders like websites and Fortnite. So if you’re planning on getting a new job in the industry, we’ll help you get prepared with web services interview questions. And to make sure you do your best and get the job, we’re also adding REST, RESTful, and SOAP interview questions. Put yourself in the shoes of the interviewee, and let’s get going!
Web services are communication services which devices can use to communicate with one another (usually over the internet).
Typically, a web service provides an object-oriented interface to a database server. In turn, this server provides a user interface to the end user. The information from one server to another is translated to XML or JSON so they’re universally recognized, and can be applied to different devices.
All of this is done over the network. For example, HTTP is used for machine-to-machine communication in web services.
To put it simply: web services are like phones. One computer “speaks” into one handset, and the other hears it and proceeds with instructions.
A great example of a web service is Apache CXF.
What makes it a web service is that it supports SOAP, addressing, policy, reliable messaging, has a JAX-WS API for development, and uses HTTP, JMS and WebSocket transport layers, among other features.