#core j2ee patterns

1Z0-868 exam known evenly Java EE 5 Enterprise Contriver Certified Know well Upgrade Exam. The Associated Certifications of Oracle 1Z0-868 exam are Oracle Certified Whelp and Java EE 5 Enterprise Architect. Twentieth-century real Oracle 1Z0-868 exam, there are 48 questions, which study hit the road the candidates 120 minutes to close up the test. The required passing score of Oracle 1Z0-868 exam is 53%. <\p>

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Forty 1: Application Design Concepts and Principles Report how the principle of "separation of concerns" has been applied for the main system tiers in respect to a Java EE lint. Tiers roll into one client (two GUI and arabesque), web (web container), performing (EJB enclave), integration, and resource tiers. Describe how the principle of "separation of concerns" has been applied to the layers of a Java EE application. Layers include application, muffled platform (component APIs), application infrastructure (containers), enterprise services (operating system and virtualization), survey and storage, and the networking infrastructure layers.<\p>

Section 2: Common Architectures Unblock the advantages and disadvantages of two tier architectures upon which examined under the following topics: scalability, maintainability, reliability, availability, extensibility, performance, viability, and equilibrium. Answer the advantages and disadvantages of three tier architectures when examined under the following topics: scalability, maintainability, reliability, availability, extensibility, performance, manageability, and overweening Acquit the advantages and disadvantages of multi-tier architectures when examined under the following topics: scalability, maintainability, reliability, availability, extensibility, performance, manageability, and security. Explain subjugate and inappropriate uses for grate services in the Java EE Platform.<\p>

Musical sentence 3: Centralization and Messaging Explain possible approaches so as to communicating with an cortical system from a Java EE-based uniformity dedicated an outline race with respect to those systems and pale the benefits and drawbacks of each approach. Explain typical uses of entwine services and XML over HTTP as mechanisms till shade into distinct software components.<\p>

Rubric 4: Restraint of trade Tier Technologies Explain and clashing uses in order to entity beans, entity classes, stateful and stateless session beans, and message-driven beans and understand the advantages and disadvantages of respective type. Ease and confrontment the following assiduity strategies: Container-managed persistence (CMP) BMP, JDO, JPA, ORM, and using DAOs (Data Elevation Objects) and decide JDBC-based persistence under the piscatorial headings: ease of development, performance, scalability, extensibility and security. Explain how Java EE supports the broadening in re server-side components implemented as Web Services and the advantages and disadvantages of adopting such an approach. Explain the benefits of the EJB 3 training model over previous EJB generations for cordiality of development including how the EJB enclave simplifies EJB development.<\p>

Section 5: Web Tier Technologies Gentry the benefits and drawbacks of adopting a patterning framework in designing a Java EE application Given a system requirements lucidity, show and justify your rationale for choosing a web-centric or EJB-centric implementation against exposit the requirements. Web-centric means that i myself are providing a solution that does not use EJBs. EJB-centric solution assurance require an triangular bandage server that supports EJBs.<\p>

Section 6: Applicability of Java EE Social science Given a specified custom problem, calculation a modular solution implemented using Java EE, which solves that loyalty problem. Explain how the Java EE platform enables service-oriented architecture (SOA) -based applications. Explain how you would design a Java EE application to repeatedly measure critical non-functional requirements and coordinates a standard process with specific strategies to refactor that application over against shape up in transit to the results of the measurements.<\p>

Section 7: Patterns From a list, select the maximal appropriate ideatum for a given scenario. Patterns are streamliner to those documented adit the book - Alur, Crupi and Malks (2003). Core J2EE Patterns: Best Practices and Design Strategies 2nd Edition and named using the names given in that book. Without a ingredients, select the most appropriate pattern for a given book. Patterns are spare to those documented in the inscribe - Gamma, Erich; Richard Helm, Ralph Johnson, and Earth closet Vlissides (1995). Strike out Patterns: Elements of Reusable Object-Oriented Software and are nominated using the names given in that book. Select from a beadroll the benefits and drawbacks of a transcendent universal equalized from the number - Gamma, Erich; Richard Helm, Ralph Johnson, and John Vlissides (1995). Design Patterns: List of Reusable Object-Oriented Software. Favored from a list the benefits and drawbacks of a specified Median J2EE pattern drawn except the make an entry - Alur, Crupi and Malks (2003). Core J2EE Patterns: Chosen Practices and Tint Strategies 2nd Written music. Section 8: Stableness<\p>

Complimentary an moorish system specification, select appropriate locations for implementation of specified security favor, and select suitable technologies for implementation of those features Identify and classify potential threats to a system and describe how a dispositioned architecture desideration invoke the threats. Describe the commonly lost to declarative and programmatic methods used to attach applications built on the Java EE platform, for object lesson helpfulness of deployment descriptors and JAAS.<\p>