100+ Free Java EE 7 Application Developer Practice Questions

Understanding Java EE Architecture

Describe Java EE 7 standards, containers, APIs, and services; differentiate the web, business, and EIS tiers and their containers; obtain resources via injection and JNDI; and package and deploy WAR, EJB JAR, and EAR archives with optional XML descriptors.

Managing Persistence using JPA Entities and Bean Validation

Create entity and relationship ORM mappings, use EntityManager for persist, merge, find, and locking, manage the persistence context and dirty checking, write JPQL and named queries, apply key generation and AttributeConverters, and enforce Bean Validation constraints.

Implementing Business Logic using EJBs

Develop stateless, stateful, and singleton session beans and their lifecycles; apply container-managed transaction attributes such as REQUIRED and REQUIRES_NEW; use @Asynchronous, @Schedule timers, singleton concurrency, and EJB security and exception semantics.

Using Java Message Service (JMS) API

Apply point-to-point and publish/subscribe models, the JMS 2.0 simplified API with injected JMSContext, message-driven beans implementing onMessage, message types and selectors, durable subscriptions, and transacted JMS within JTA.

Implementing SOAP Web Services using JAX-WS

Create @WebService endpoints and consume WSDL contracts, bind XML with JAXB, customize SOAP messages with @WebParam and @SOAPBinding, add SOAP handlers for cross-cutting concerns, and invoke services asynchronously from clients.

Creating Java Web Applications using Servlets and JSPs

Map servlets with @WebServlet, handle HTTP methods, headers, parameters, and cookies, use filters and request.startAsync, manage request, session, and application scope, forward with RequestDispatcher, and build views with JSP, EL, and JSTL.

Implementing REST Services using JAX-RS API

Define resources with @Path and HTTP-method annotations, bind parameters with @PathParam and @QueryParam, negotiate content with @Produces and @Consumes, return Response objects, use filters and ExceptionMapper, call the JAX-RS 2.0 client API, and integrate CDI and EJB.

Developing Web Applications using JSF

Understand the six-phase JSF lifecycle, build Facelets views with deferred EL, expose CDI @Named backing beans, use @ViewScoped for multi-postback state, apply converters and validators, and enable partial processing with f:ajax.

Securing Java EE 7 Applications

Apply declarative security with @RolesAllowed, @DeclareRoles, @PermitAll, and web.xml security-constraint; configure authentication methods such as BASIC and FORM and transport guarantees; and perform programmatic checks with isUserInRole.

Using CDI Beans, Concurrency, Batch and WebSocket APIs

Use CDI injection, scopes, qualifiers, producers, events, interceptors, and decorators; run tasks on a ManagedExecutorService (JSR 236); define chunk jobs with the Batch API and JSL (JSR 352); and build WebSocket endpoints with @ServerEndpoint and @OnMessage (JSR 356).