Sun Certified Developer for Java Web Services (CX-310-230) Exam Objectives

Exam Objectives

Section 1: XML Web Service Standards

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• Given XML documents, schemas, and fragments determine whether their syntax and form are correct (according to W3C schema) and whether they conform to the WS-I Basic Profile 1.1.
• Describe the use of XML schema in J2EE Web services.

Section 2: SOAP 1.2 Web Service Standards

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• List and describe the encoding types used in a SOAP message.
• Describe the SOAP Processing and Extensibility Model.
• Describe SOAP Message Construct and create a SOAP message that contains an attachment.

Section 3: Describing and Publishing (WSDL and UDDI)

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• Explain the use of WSDL in Web services, including a description of WSDL's basic elements, binding mechanisms and the basic WSDL operation types as limited by the WS-I Basic Profile 1.1.
• Describe how WSDL enables one to separate the description of the abstract functionality offered by a service from concrete details of a service description such as “how” and “where” that functionality is offered.
• Describe the Component Model of WSDL including Descriptions, Interfaces, Bindings, Services and Endpoints.
• Describe the basic functions provided by the UDDI Publish and Inquiry APIs to interact with a UDDI business registry.

Section 4: JAX-WS

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• Explain JAX-WS technology for building web services and client that communicate using XML.
• Given a set of requirements for a Web service, such as transactional needs, and security requirements, design and develop Web service applications that use JAX-WS technology.
• Describe the Integrated Stack (I-Stack) which consist of JAX-WS, JAXB, StAX, SAAJ.
• Describe and compare JAX-WS development approaches.
• Describe the features of JAX-WS including the usage of Java Annotations.
• Describe the architecture of JAX_WS including the Tools SPI that define the contract between JAX-WS tools and Java EE.
• Describe creating a Web Service using JAX-WS.
• Describe JAX-WS Client Communications Models.
• Given an set of requirements, design and develop a Web service client, such as a Java EE client and a stand-alone client, using JAX-WS.
• Given a set of requirements, create and configure a Web service client that accesses a stateful Web service.

Section 5: REST, JSON, SOAP and XML Processing APIs (JAXP, JAXB and SAAJ)

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• Describe the characteristics of REST Web Services.
• Describe the characteristics of JSON Web Services.
• Compare SOAP web services to REST Web Services.
• Compare SOAP web services to JSON Web Services.
• Describe the functions and capabilities of the APIs included within JAXP.
• Describe the functions and capabilities of JAXB, including the JAXB process flow, such as XML-to-Java and Java-to-XML, and the binding and validation mechanisms provided by JAXB.
• Create and use a SOAP message with attachments using the SAAJ APIs.

Section 6: JAXR

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• Describe the function of JAXR in Web service architectural model, the two basic levels of business registry functionality supported by JAXR, and the function of the basic JAXR business objects and how they map to the UDDI data structures.
• Create JAXR client to connect to a UDDI business registry, execute queries to locate services that meet specific requirements, and publish or update information about a business service.

Section 7: J2EE Web Services

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• Identify the characteristics of and the services and APIs included in the Java EE platform.
• Explain the benefits of using the Java EE platform for creating and deploying Web service applications.
• Describe the functions and capabilities of the JAXP, DOM, SAX, StAX, JAXR, JAXB, JAX-WS and SAAJ in the Java EE platform.
• Describe the role of the WS-I Basic Profile when designing Java EE Web services.

Section 8: Security

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• Explain basic security mechanisms including: transport level security, such as basic and mutual authentication and SSL, message level security, XML encryption, XML Digital Signature, and federated identity and trust.
• Identify the purpose and benefits of Web services security oriented initiatives and standards such as Username Token Profile, SAML, XACML, XKMS, WS-Security, and the Liberty Project.
• Given a scenario, implement Java EE based web service web-tier and/or EJB-tier basic security mechanisms, such as mutual authentication, SSL, and access control.
• Describe factors that impact the security requirements of a Web service, such as the relationship between the client and service provider, the type of data being exchanged, the message format, and the transport mechanism.
• Describe WS-Policy that defines a base set of constructs that can be used and extended by other Web services specifications to describe a broad range of service requirements and capabilities.

Section 9: Developing Web Services

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• Describe the steps required to configure, package, and deploy Java EE Web services and service clients, including a description of the packaging formats, such as .ear, .war, .jar, annotations and deployment descriptor settings.
• Given a set of requirements, develop code to process XML files using the SAX, StAX, DOM, XSLT, and JAXB APIs.
• Given an XML schema for a document style Web service create a WSDL file that describes the service and generate a service implementation.
• Given a set of requirements, create code to create an XML-based, document style, Web service using the JAX-WS APIs.
• Implement a SOAP logging mechanism for testing and debugging a Web service application using Java EE Web Service APIs.
• Given a set of requirements, create code to handle system and service exceptions and faults received by a Web services client.

Section 10: Web Services Interoperability Technologies

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• Describe WSIT, the features of each WSIT technology and the standards that WSIT.
• Describe how to create a WSIT client from a Web Service Description Language (WSDL) file.
• Describe how to configure Web Service providers and clients to use message optimization.
• Create a Microsoft Windows Communication Foundation (WCF) client that accesses a Java Web Service.
• Describes the best practices for production and consumption of data for interoperability between WCF Web Services and Java web service clients or between Java WebServices and WCF Web Service clients.

Section 11: General Design and Architecture

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• Describe the characteristics of a service-oriented architecture and how Web Services fit this model.
• Given a scenario, design a Java EE Web Service using Web Services Design Patterns (Asynchronous Interaction, JMS Bridge, Web Service Cache, Web Serive Broker), and Best Practices.
• Describe how to handle the various types of return values, faults, errors, and exceptions that can occur during a Web service interaction.
• Describe the role that Web Services play when integrating data, application functions, or business processes in a Java EE application.

Endpoint Design and Architecture

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• Given a scenario, design Web Service applications using information models that are either procedure-style or document-style.
• Describe the function of the service interaction and processing layers in a Web Service.
• Design a Web Service for an asynchronous, document-style process and describe how to refactor a Web Service from a synchronous to an asynchronous model.
• Describe how the characteristics, such as resource utilization, conversational capabilities, and operational modes, of the various types of Web service clients impact the design of a Web service or determine the type of client that might interact with a particular service.

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Sun Certified Web Component Developer for the Java Platform, Enterprise Edition 5 (CX-310-083): Exam Objectives

Assignment Objectives

Section 1: The Servlet Technology Model

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• For each of the HTTP Methods (such as GET, POST, HEAD, and so on) describe the purpose of the method and the technical characteristics of the HTTP Method protocol, list triggers that might cause a Client (usually a Web browser) to use the method; and identify the HttpServlet method that corresponds to the HTTP Method.
• Using the HttpServletRequest interface, write code to retrieve HTML form parameters from the request, retrieve HTTP request header information, or retrieve cookies from the request.
• Using the HttpServletResponse interface, write code to set an HTTP response header, set the content type of the response, acquire a text stream for the response, acquire a binary stream for the response, redirect an HTTP request to another URL, or add cookies to the response.
• Describe the purpose and event sequence of the servlet life cycle: (1) servlet class loading, (2) servlet instantiation, (3) call the init method, (4) call the service method, and (5) call destroy method.

Section 2: The Structure and Deployment of Web Applications

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• Construct the file and directory structure of a Web Application that may contain (a) static content, (b) JSP pages, (c) servlet classes, (d) the deployment descriptor, (e) tag libraries, (d) JAR files, and (e) Java class files; and describe how to protect resource files from HTTP access.
• Describe the purpose and semantics of the deployment descriptor.
• Construct the correct structure of the deployment descriptor.
• Explain the purpose of a WAR file and describe the contents of a WAR file, how one may be constructed.

Section 3: The Web Container Model

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• For the ServletContext initialization parameters: write servlet code to access initialization parameters; and create the deployment descriptor elements for declaring initialization parameters.
• For the fundamental servlet attribute scopes (request, session, and context): write servlet code to add, retrieve, and remove attributes; given a usage scenario, identify the proper scope for an attribute; and identify multi-threading issues associated with each scope.
• Describe the Web container request processing model; write and configure a filter; create a request or response wrapper; and given a design problem, describe how to apply a filter or a wrapper.
• Describe the Web container life cycle event model for requests, sessions, and web applications;create and configure listener classes for each scope life cycle; create and configure scope attribute listener classes; and given a scenario, identify the proper attribute listener to use.
• Describe the RequestDispatcher mechanism; write servlet code to create a request dispatcher; write servlet code to forward or include the target resource; and identify and describe the additional request-scoped attributes provided by the container to the target resource.

Section 4: Session Management

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• Write servlet code to store objects into a session object and retrieve objects from a session object.
• Given a scenario describe the APIs used to access the session object, explain when the session object was created, and describe the mechanisms used to destroy the session object, and when it was destroyed.
• Using session listeners, write code to respond to an event when an object is added to a session, and write code to respond to an event when a session object migrates from one VM to another.
• Given a scenario, describe which session management mechanism the Web container could employ, how cookies might be used to manage sessions, how URL rewriting might be used to manage sessions, and write servlet code to perform URL rewriting.

Section 5: Web Application Security

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• Based on the servlet specification, compare and contrast the following security mechanisms: (a) authentication, (b) authorization, (c) data integrity, and (d) confidentiality.
• In the deployment descriptor, declare a security constraint, a Web resource, the transport guarantee, the login configuration, and a security role.
• Compare and contrast the authentication types (BASIC, DIGEST, FORM, and CLIENT-CERT); describe how the type works; and given a scenario, select an appropriate type.

Section 6: The JavaServer Pages (JSP) Technology Model

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• Identify, describe, or write the JSP code for the following elements: (a) template text, (b) scripting elements (comments, directives, declarations, scriptlets, and expressions), (c) standard and custom actions, and (d) expression language elements.
• Write JSP code that uses the directives: (a) 'page' (with attributes 'import', 'session', 'contentType', and 'isELIgnored'), (b) 'include', and (c) 'taglib'.
• Write a JSP Document (XML-based document) that uses the correct syntax.
• Describe the purpose and event sequence of the JSP page life cycle: (1) JSP page translation, (2) JSP page compilation, (3) load class, (4) create instance, (5) call the jspInit method, (6) call the _jspService method, and (7) call the jspDestroy method.
• Given a design goal, write JSP code using the appropriate implicit objects: (a) request, (b) response, (c) out, (d) session, (e) config, (f) application, (g) page, (h) pageContext, and (i) exception.
• Configure the deployment descriptor to declare one or more tag libraries, deactivate the evaluation language, and deactivate the scripting language. 6.7 Given a specific design goal for including a JSP segment in another page, write the JSP code that uses the most appropriate inclusion mechanism (the include directive or the jsp:include standard action).

Section 7: Building JSP Pages Using the Expression Language (EL)

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• Given a scenario, write EL code that accesses the following implicit variables including pageScope, requestScope, sessionScope, and applicationScope, param and paramValues, header and headerValues, cookie, initParam and pageContext.
• Given a scenario, write EL code that uses the following operators: property access (the . operator), collection access (the [] operator).

Section 8: Building JSP Pages Using Standard Actions

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• Given a design goal, create a code snippet using the following standard actions: jsp:useBean (with attributes: 'id', 'scope', 'type', and 'class'), jsp:getProperty, jsp:setProperty (with all attribute combinations), and jsp:attribute.
• Given a design goal, create a code snippet using the following standard actions: jsp:include, jsp:forward, and jsp:param.

Section 9: Building JSP Pages Using Tag Libraries

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• For a custom tag library or a library of Tag Files, create the 'taglib' directive for a JSP page.
• Given a design goal, create the custom tag structure in a JSP page to support that goal.
• Given a design goal, use an appropriate JSP Standard Tag Library (JSTL v1.1) tag from the "core" tag library.

Section 10: Building a Custom Tag Library

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• Describe the semantics of the "Classic" custom tag event model when each event method (doStartTag, doAfterBody, and doEndTag) is executed, and explain what the return value for each event method means; and write a tag handler class.
• Using the PageContext API, write tag handler code to access the JSP implicit variables and access web application attributes.
• Given a scenario, write tag handler code to access the parent tag and an arbitrary tag ancestor.
• Describe the semantics of the "Simple" custom tag event model when the event method (doTag) is executed; write a tag handler class; and explain the constraints on the JSP content within the tag.
• Describe the semantics of the Tag File model; describe the web application structure for tag files; write a tag file; and explain the constraints on the JSP content in the body of the tag.

Section 11: Java EE Patterns

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• Given a scenario description with a list of issues, select a pattern that would solve the issues. The list of patterns you must know are: Intercepting Filter, Model-View-Controller, Front Controller, Service Locator, Business Delegate, and Transfer Object.
• Match design patterns with statements describing potential benefits that accrue from the use of the pattern, for any of the following patterns: Intercepting Filter, Model-View-Controller, Front Controller, Service Locator, Business Delegate, and Transfer Object.

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Sun Certified Web Component Developer (SCWCD)

This certification is for developers specializing in the application of JavaServer Pages and servlet technologies used to present Web services and dynamic Web content. To achieve this certification, candidates must successfully complete one exam. Prior to attempting certification, candidates must be certified as a Sun Certified Programmer (SCJP), any edition. Follow links for detailed information, exam objectives and to purchase: - Sun Certified Web Component Developer for the Java Platform, Enterprise Edition 5 (CX-310-083) - Upgrade Exam: Sun Certified Web Component Developer for the Java Platform, Enterprise Edition 5 (CX-310-084)

Certification Preparation

Sun is pleased to take the guesswork out of preparing for certification. Learn about prerequisites, practice exams and recommended training options to help you achieve this certification. » More Certification exams and training products must be purchased in the country where you reside. For inquiries outside this country, please select your local training office. » More

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