Cause all that matters here is passing the Oracle 1Z0-807 exam. Cause all that you need is a high score of 1Z0-807 Java Enterprise Edition 6 Enterprise Architect Certified Master Exam (Step 1 of 3) exam. The only one thing you need to do is downloading Pass4sure 1Z0-807 exam study guides now. We will not let you down with our money-back guarantee.
♥♥ 2021 NEW RECOMMEND ♥♥
Free VCE & PDF File for Oracle 1Z0-807 Real Exam (Full Version!)
★ Pass on Your First TRY ★ 100% Money Back Guarantee ★ Realistic Practice Exam Questions
Q31. Which two statements are true about the timer service of a business component container?
A. Timed notifications for all types of session beans can be scheduled by using this service.
B. When the server is shut down, the timer is persisted automatically and becomes active again when the server is restarted.
C. Each instance of message driven beans has unique timers.
D. When stateful session bean instance is removed, the container detaches the timers associated with the instance and allocates them to the new instance.
E. When a transaction is rolled hark, the timer creation within the transaction is also rolled back.
Q32. Your company has been using the ACME database vendor for many years. Recently, it started considering a migration to the XYZ database vendor, who uses different SQL dialed. The SQL engines in ACME and XYZ have significant differences in performance when executing the same SQL queries?
Which is the best persistence technology for database migration?
C. CMP entity bean
D. JDBC row set XML serialization
Q33. You are implementing an online music that will store and play a user’s collection of songs. You want users to rate their songs and view the top songs from friends. All queries must complete in four seconds or less.
Which approach would meet the response time requirement with minimal overhead?
A. Java class that uses JDBC with embedded SQL
B. Java class that uses an optimized stored procedure
C. JPA entity class with a lazy fetching strategy
D. JPA entity class with an eager fetching strategy
Q34. Your company has decided to expose a set of business operations through an API so that clients can access them remotely. These operations, which are modeled as methods on a stateless session bean component, act as building blocks for complex state-changing activities that need to possess atomicity,, consistency, isolation and durability (ACID) semantics.
Select the best technology to implement the API.
A. Remote Method Invocation (RMI)
B. Java Message Service (JMS)
C. XML over HTTP
D. Java Connector Architecture (JCA)
Q35. Which two are primary concerns for a service-oriented architecture (SOA)?
A. Low cohesion
B. Loose coupling
C. Session handling
D. Well defined contracts
Q36. ABC Travel offers a night reservation service, exposed as a web service. XYZ Stays offers a hotel reservation service, also exposed as a web service. ABC and XYZ will not change their web service. A startup company has contacted you for advice about designing a new service that combines flight and hotel reservations, which they will offer as a web service.
The startup company plans to provide their service by implementing a portable Java EE solution that aggregates the two services offered by ABC Travel and XYZ Stays, a combined reservation succeeded.
Only if both the flight reservation and the hotel reservation succeed Which is the most effective way to meet the business requirement?
A. The startup company should implement their new service as a web service that uses an XA transaction manager.
B. The startup company cannot implement their new service as a web service, but must use an enterprise JavaBean (EJB) component to gain transaction propagation.
C. The startup company should implement their new service as a web service by calling the two existing services, and implementing their own compensating transaction.
D. The startup company can implement their new service as a web service by calling the two existing services in a single transaction, relying on transaction propagation to support this business rule.
Q37. Which two kinds of applications benefit from the adoption of service oriented architecture (SOA) inspired patterns and practices?
A. An application that retains legacy systems while evolving to accommodate future business demands
B. An application with tightly coupled services that enable messages to flow easily
C. An application that utilizes fine-grained interfaces to provide communication to the object of a service
D. An application in which the communication between services and the business process are platform independent.
Q38. A company wants to design an internal website for the purpose of managing its numerous social events. The site will not have heavy traffic, but will require state to be persisted in a database. You have been tasked to complete this action item in your spare time.
Which two Java EE-based approaches are best suited for quick development?
A. Use JPA in the web tier only.
B. Use message-driven beans to manage the posting of events.
C. Use your domain model components as JavaServer Faces (JSF) managed beans.
D. Use an Enterprise javaBeans (EJB) container to service-inject the domain model and support a JPA deployment.
Q39. You have been tasked with improving the availability of an existing three tier application.
What is your first stop in evaluating what changes should be made to the architecture to achieve the goal?
A. Monitor network traffic between tiers.
B. Separate presentation from business logic.
C. Identify and document all single points of failure.
D. Cluster the presentation tier without session replication.
Q40. Your development team wants to use Google Guice. A previous architect assigned this request a low priority, citing the complexity of integration and no compelling benefits statements from the requesting team.
The team claims that their colleagues have achieved the integration using a pattern. This pattern reduced the level of difficulty and risk and did not require vendor support.
Which pattern fits this description?
A. Context Holder
B. Service Starter
C. Dependency Injection Extender
D. Bean Locator