barcode in vb.net 2008 4: Applicability of JEE Technology in Java

Generation QR in Java 4: Applicability of JEE Technology

4: Applicability of JEE Technology
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17. Regarding the JEE EIS integration, which of the following statements is not true A. Before the JEE Connector architecture was defined, no specification for the Java platform addressed the problem of providing a standard architecture for integrating heterogeneous EISs. B. The JEE Connector architecture provides a Java solution to the problem of connectivity between the many application servers and only new EISs, not those already in existence. C. Application server vendors who conform to the JEE Connector architecture do not need to add custom code whenever they want to add connectivity to a new EIS. 18. Regarding the JEE EIS integration contracts, which of the following statements is not true A. A Connection Management contract allows an application server to pool connections to an underlying EIS. B. A Transaction Management contract lets an application server use a transaction manager to manage transactions across multiple resource managers. C. A Security Contract provides support for a secure application environment, which reduces security threats to the EIS and protects valuable information resources managed by the EIS. D. A Transaction Management contract does not support transactions that are managed internal to an EIS resource manager without the necessity of involving an external transaction manager. 19. Which is the following is not true about enterprise applications and integration A. Data integration focuses on integrating existing data with enterprise applications. For example, an integration might entail integrating a web-based order management system with an existing order and customer database. B. Legacy integration involves integrating new enterprise applications with applications and EISs that have been in operation for some time, often referred to as an enterprise s legacy systems. C. Application integration occurs when existing enterprise applications may be off-the-shelf bundled applications or they may be developed in-house. D. Enterprise application development is about building an enterprise application from scratch.
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Self Test Answers
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SELF TEST ANSWERS
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3 1. C is correct. An application client container manages the execution of all application client components for a single JEE application. Application clients and their accompanying container run on the client s machine and not the JEE server. A, B, and D are incorrect because they are true. 3 2. B is correct. The Enterprise JavaBeans (EJB) tier does host system-level services such as transaction management, concurrency control, and security. A, C, and D are incorrect because they are true. 3 3. D is correct. When using a compensating transaction, it is not always possible to undo the effect of a committed transaction, even if the server crashes. A, B, and C are incorrect because they are true.
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3 4. C is correct. JEE uses the core patterns to enable flexible association of EJB classes with other components. The Designer pattern is not one of them. A, B, and D are incorrect because they are true. Decorator, factory, and proxy are core patterns to enable flexible association of EJB classes with other components.
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3 5. C is correct. A session bean facade does shield the client from complex entity bean relationships and manages workflow on the client s behalf. A, B, and D are incorrect because they are true.
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Review Best Practices Applicable for All Tiers
3 6. A and D are correct. Enterprise JavaBeans are best used with large and complex enterprise applications with high deployment and transactional requirements. B and C are incorrect. 3 7. D is correct. The security tier is not considered a JEE tier. A, B, and C are incorrect because they are true client, web, and EIS are JEE tiers. 3 8. B is correct. Coding data manipulation logic, format and display code, and user event handling together can complicate and make application maintenance problematic and costly. A, C, and D are incorrect because they are true.
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