Computer Knowledge

Java Enterprise and Web Technologies

2,279 Questions

Java enterprise and web technologies questions focus on J2EE architecture, web services like SOAP, and servlet functionalities. These topics frequently appear in IT officer and specialist scale examinations. Regular practice ensures familiarity with enterprise application components.

HttpServlet methodsSOAP and web servicesEJB architecture rolesJ2EE componentsJSP servlet callingUDDI concepts

Java Enterprise and Web Technologies Questions

Multiple choice

Why SOAP is used as a protocol for accessing a web service?

  1. SOAP platform and language independent, allows to get around firewalls

  2. SOAP is based on HTML

  3. SOAP is designed to communicate through LAN

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

SOAP's key advantages are platform and language independence, plus its ability to traverse firewalls by using HTTP as its transport protocol. This makes it ideal for heterogeneous environments. SOAP is XML-based, not HTML-based, and is designed for WAN/internet communication, not just LAN.

Multiple choice

Service Transport, XML Messaging, Service Description and Service Discovery are four layers of

  1. web service implementing client components

  2. web service protocol stack

  3. web service supporting repository

  4. web service supporting request and response components
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The web service protocol stack consists of four layers: Service Transport (HTTP, SMTP, etc.), XML Messaging (SOAP, XML-RPC), Service Description (WSDL), and Service Discovery (UDDI). These layers work together to enable web service communication.

Multiple choice

Which of the following is an open source SOAP server and client?

  1. Apache ANT

  2. Apache Tomcat

  3. Jakarta Struts

  4. Apache Axis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Apache Axis is an open source implementation of the SOAP protocol, providing both server and client functionality for creating and consuming web services. Apache ANT is a build tool, Tomcat is a servlet container, and Struts is a web framework.

Multiple choice

Web Services attempts to describe architecture based on

  1. Representational State Transfer (REST)

  2. Remote Procedure Calls

  3. Reusable Application Components

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

REST (Representational State Transfer) is an architectural style for designing networked applications, particularly web services. It uses standard HTTP methods (GET, POST, PUT, DELETE) and emphasizes stateless communication, resource identification through URIs, and standardized interfaces.

Multiple choice

What is a web service?

  1. A standard way of integrating web-based applications

  2. One type of service that can be part of a Service Oriented Architecture

  3. Programmable XML-based service

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Web services encompass all these characteristics: they provide a standard way to integrate web-based applications using XML-based protocols, and they can be part of a Service Oriented Architecture (SOA).

Multiple choice

What are the web service platform elements?

  1. SOAP, UDDI, XML

  2. HTTP, WSDL

  3. UDDI, XML, SOAP

  4. SOAP, UDDI, WSDL
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Web service platforms consist of three core standards: SOAP (Simple Object Access Protocol) for messaging, UDDI (Universal Description, Discovery, and Integration) for service registry/discovery, and WSDL (Web Services Description Language) for describing service interfaces.