The Secret of Oracle 1Z0-807 practice test

Q1. You are using an open source integration framework in your project. However, key interfaces do not explicitly define several strange conditions you have repeatedly seen while testing.

Which option is the name given to the anti pattern described above?

A. Composite View

B. Leaky Abstraction

C. Asynchronous Interaction

D. Golden Hammer

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Q2. Which two are significant advantages of developing web applications with JavaServer Faces (JSF)?

A. JSF pages can be previewed outside the web container.

B. Backing beans can be unit tested outside the web container.

C. Client-side validation mechanisms are automatically generated.

D. JSF pages can be integrated with AJAX.

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Q3. Which two actions limit the consequences of a network based attack?

A. Implementing the principle of least privilege

B. Installing a firewall at the outer boundary of your systems

C. Placing Internet-accessible servers in a demilitarized zone

D. Deploying a single sign-on system to provide system-wide authorization

E. Allowing application servers privileged access to all databases

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Q4. Which three actions restrict the ability of a web application to scale in response to load as additional computing resources are made available to it?

A. Implementing the Singleton pattern in the web tier

B. Implementing core business logic in the web tier

C. Implementing core business logic using stateless session beans

D. Storing users' session state in a database

E. Maintaining users' session state by using stateful session beans

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Q5. A company is extending is successful social networking site to support the following channels: instant messaging (IM), email messaging and text messaging/SMS. At present, the site has scaled 400% in one year using a standard MVC Web framework the application experiences large surges or spikes in demand and also periods of inactivity. Notification delivery to the three channels does not need to be guaranteed.

Which solutions extends the current architecture and best meets the company’s requirements?

A. Send the notification inline, that is, within the normal HTTP request-response cycle.

B. Place messaging on a Java messaging Service (JMS) queue and use message-driven beans (MDBs) to create and send notifications.

C. Insert the messages into a database and use plain old Java Objects (POJOs) to read the messaging using JDBC and send notifications.

D. Insert the messages into a database and use entity beans to read the messages using JDBC and send notifications.

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Q6. Which two statements describe the contact between an Enterprise JavaBeans (EJB) container and the EJBs that it hosts?

A. The container provides automatic logging of all exceptions and errors generated by EJB code.

B. The container provides a transparent scaling mechanism to handle spikes in demand.

C. An EJB can extend its services, such as security, to improve performance.

D. The container has a well defined lifecycle model for each EJB type.

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Q7. Which three principles are best practices when implementing a logging strategy for an enterprise application?

A. Never print log messages to the console window.

B. Use the appropriate logger level for logging information.

C. Log messages for every method entry and exit.

D. Include programmer-specific data in the log messages.

E. Include the thread name and Java class name in log messages.

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Q8. Which two statements apply to unsigned applets?

A. They can access the client file system.

B. They can connect to third-party servers.

C. They can connect to the originating host.

D. They can invoke public methods of applets on a page.

E. They can load native libraries.

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Q9. Your company uses a payroll application that was developed using Java technologies. The company has acquired another company and plans to integrate its payroll process in existing application. You have been asked to implement this integration. You observe that

the business logic adopted to calculate the payroll is different in both companies.

Which design pattern would be most appropriate to use in this integration?

A. Strategy

B. Payload Extractor

C. Fly Weight

D. Composite

E. Service Locator

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Q10. Which option describes the design relationship between session beans and entity beans?

A. Aggregation

B. Separation of concerns

C. Common reuse principle

D. Liskov substitution principle

E. Interface segregation principle

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