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Oracle 1Z0-807 Java Enterprise Edition 6 Enterprise Architect Certified Master Exam (Step 1 of 3) Exam
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Question 1 Your company requires all its developers to use a well-specifed set of excepton classes to model several common error conditonss many of the which are specifc to its business. These excepton classes are centrally maintained and come packaged in a library (a JAR flee. The applicaton you are developing needs to report a number of error conditons covered by this library to remote clients. Which paring of component type and remote access technology enables client applicatons to use the predefned exceptons as part of their natural programming model? A. Servlet accessed using HTTP B. Entty bean accessed using web services C. Stateless session bean accessed using Remote Method Invocaton (RMIe D. Message-driven bean accessed using Java Message Service (JMSe queue
Aoswern C Question 2 An investment company has purchased a number of small online business referral systems that appeal to various niche demographics. The company wants to bring these networks together in hopes of fnding a broads single theme and brand image for these groups before they can do thats they need to get the users communicatng with outside their current networks. Which Web Services patern would you recommend they consider in building a scheme to accommodate this communicaton? A. Asynchronous Interactons B. PAOS Interactons C. Web Services Broker D. JMS Bridge
Aoswern A Question 3 A Hot Potato ant patern can arise from misuse of which technology combinaton? A. Bean Validaton with JSF Managed Beans B. Messaging in the Business Tier C. JNDI Lookups with Global Java Naming D. JPA with the Web Tier
Aoswern C Question 4 You are the architect of an existng project. Making changes to one component frequently requires making changes to many other components. Which acton would reduce future maintenance costs?
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A. Redesign the confguraton and deployment. B. Add an abstracton layer between the servlets and the EJB components. C. Convert all stateful EJB components to stateless EJB components. D. Expose the existng EJB components as web services.
Aoswern B Question 5 Your consultng company has been asked to enhance an existng applicaton. The current applicaton is a two-ter system in which all the business logic is located in thick clients. You are considering a soluton that would involve moving the business logic into the server's database In the form of stored procedures. Which statement is an expected outcome of your proposed soluton? A. It will improve the scalability of the system. B. It will improve the manageability of the system. C. It will recline the amount of trafc on the network. D. It wills in efects turn the applicaton into a three-ter system.
Aoswern B Question 6 A company manufactures widgets for sale to distributon. Distributors call this company when they want to order more widgets. The company wants the distributors to send orders using XML documents over the Internet to reduce the number of data entry personnel needed. It has no control over the distributors technologies. The company does not want the Orders to impact the performance of other users. You have been assigned the task of designing a new API. Which method do you use? A. Design the API as a Java Message Service (JMSe queue. B. Design the API as an Remote Method Invocaton (RMIe interface. C. Design the API as a synchronous web service. D. Design the API as an asynchronous web service.
Aoswern D Question 7 You have been recruited by an online retailer of footwear to conduct a review of their online systems. Your primary Finding is that the development team has implemented duplicated complex business logic as Java scripts directly into the JSPss causing performances scalabilitys and maintainability issues. Which two design paterns would you select to improve the current code base? A. View Helper B. From Controller C. Composite View
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D. Service-to-Worker E. Business Delegate
Aoswern B,D Question 8 A successful web applicaton is used by over two hundred thousand users. Due to this substantal loads the database is over bridged and fails frequently. All datas included critcal user records and temporary session datas is stored in the database. Because of resource constraintss a new database system cannot be installed. Which change will reduce the load on the database? A. Creatng more entty beans to optmiie interacton wild the database B. Refactoring the web applicaton to use DAOs to communicate with the database C. Refactoring the web applicaton to store temporary session data on the web servers D. Adding more web servers to the web ter to distribute the load and reduce the number of transactons on the database.
Aoswern C Question 9 MedLabML is a startup frm that moves patent data between diferent care providers to provide a “single patent view�. They use a B2B system to exchange electronic business document with their key suppliers. They are seeking your advice about standards to review for improving their messagelevel security. Which standard or API would you recommend they read? A. SAML 1.1 B. Web Service Interoperability Technology C. XML Signature D. SSL
Aoswern B
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