Exam Code: 1Z0-864 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Java Enterprise Edition 5 Enterprise Architect Certified Master Exam (Step 1 of 3)
Certification Provider: Oracle
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2021 Jun 1Z0-864 Study Guide Questions:
Q1. You are architecting the layers for a complex n-tier web application. Which two pairs of technologies do NOT exhibit direct dependencies? (Choose two.)
A. EJB to RMI
B. Linux to JDBC
C. HTML to Firefox
D. Tomcat to Servlets
E. SunFire E20k server to Java EE
Q2. A successful web application is used by over two hundred thousand users. Due to this substantial load, the database is overburdened and fails frequently. All data, including critical user records and temporary session data, are stored in the database. Because of resource constraints, a new database system cannot be installed. Which change will reduce the load on the database?
A. Create more entity beans to optimize the interaction with the database
B. Refactor the web application to use DAOs to communicate with the database
C. Refactor the web application to store temporary session data on the web servers
D. Add more web servers to the web tier to distribute the load and reduce the number of transactions on the database
Q3. A travel company wants its application to reflect asynchronously any changes that any client might have made to information common to all clients. For example, if two clients are both viewing the same seat, when it is booked, both clients see the updated status of the seat as booked. The company is considering whether to implement the presentation using a Java Swing thick client, or a web-based client using JSP or Ajax. In which option are these technologies shown in order from best response time to worst response time?
A. Swing thick client > web-based JSP > web-based Ajax
B. web-based JSP > web-based Ajax > Swing thick client
C. web-based JSP > Swing thick client > web-based Ajax
D. Swing thick client > web-based Ajax > web-based JSP
E. web-based Ajax > Swing thick client > web-based JSP
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Q4. Which five statements about SecurityManager are true? (Choose five.)
A. The SecurityManager must be instantiated to use RMI.
B. The SecurityManager object can be discarded after loading.
C. The SecurityManager can be configured from a per-user file.
D. The SecurityManager can be configured from a system-wide file.
E. The SecurityManager object can be installed in the application code.
F. The SecurityManager object can be installed from the command line.
G. The SecurityManager can be configured from a file specified on the command line.
Q5. A brokerage firm hired you to evaluate a re-architected CPU-bound application they use in-house to do market forecasting. This application is currently architected using a single business tier, where complex algorithms are used to process large amounts of data to forecast market trends. The current machine cannot be scaled vertically any further. A prototype was built, in which the business tier was split into two tiers, where one depends on services provided by the other. They were then deployed to two servers for testing. The prototype exhibited better scalability. Which statement would explain this result?
A. The applications deployed were simpler.
B. There were more resources available to process any one request.
C. There was additional network traffic between the two business tiers of the application.
D. The business model was simplified by partitioning it into tiers with well-defined limited interactions.
Q6. WebLizard is using an application consisting of a single WAR file that exposes a number of web service endpoints using JAX-WS. What security-related information about an authenticated client is available from inside the web service endpoint implementation class?
A. only its role
B. only its principal
C. both its role and its principal
D. neither its role nor its principal
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Q7. Which web framework supports declarative data conversion between text and arbitrary Java objects?
B. JavaServer Faces
C. JavaServer Pages with <jsp:setProperty>
D. JavaServer Pages with the Expression Language
Q8. Which Java EE feature helps facilitate migration to SOA?
A. Stateful session beans can be exposed as web services.
B. Stateless session beans can be exposed as web services.
C. Stateful session beans support local and remote interfaces.
D. Stateless session beans support local and remote interfaces.
Q9. Which three statements are true about delegation as an OO design technique? (Choose three.)
A. It is applied to a system only at compile time.
B. It is an essential element of the State pattern.
C. It is an essential element of the Singleton pattern.
D. It allows you to replace inheritance with composition.
E. In Java technology, it is always implemented through the use of generics.
F. It always requires that at least two objects are involved in handling a request.
Q10. You are building a web application that must integrate to a content management system (CMS).
Your company currently has a homegrown CMS, but management is considering purchasing a new CMS. Unfortunately, you have little confidence that their latest choice, BigCMS, is likely to be the final decision. After analyzing the interface to BigCMS, you find that its interface is different from the homegrown CMS. Furthermore, you suspect that any other third-party CMS will have yet another interface. What is the simplest pattern that would isolate your web application from the interface of the CMS tool?
D. Service Locator
E. Business Delegate