Oracle Oracle Database 1Z0-807 Questions & Answers

• Question 1:

  Which two are objectives of the Abstract Factory pattern?

  A. To create whole-part hierarchies

  B. To create families of related objects

  C. To enforce dependencies between concrete classes

  D. To specify the types of objects to create by using a sample instance

  E. To separate the construction of a complex object from its representation 100% Real QandAs | 100% Real Pass

  Correct Answer: BC

• Question 2:

  Which statement is true about the use of security-related annotations in an enterprise bean?

  A. They can be used to specify permissions only on business methods.

  B. They can be used to specify permissions on a class or its business methods.

  C. They can be used to change an authentication mechanism.

  D. They can be used to acquire a secure connection using SSL.

  E. They can be inherited from a parent abstract class.

  Correct Answer: B

• Question 3:

  Your application uses web services extensively and frequently to distribute large XML objects over HTTP. In addition, the application has been set particularly demanding performance and scalability service level agreements (SLAs).

  Which java API is best suited for your application?

  A. STAX

  B. DOM

  C. JAXB

  D. JAXR

  Correct Answer: A

• Question 4:

  StockTeller is a Java-based application designed to retrieve the current market for a portfolio of publicly listed stocks. You have been tasked to design a bolt on module for StockTeller called EBroker, a Java E- based online application that needs to asynchronously communicate with StockTeller to retrieve market prices for securities in a secure manner.

  Which web service technology would you choose to integrate StockTeller into the EBroker application?

  A. JAX-WS using HTTP

  B. JAX-WS using HTTPS

  C. JAX-RPC using HTTP

  D. JAX-RS using HTTPS

  Correct Answer: B

• Question 5:

  While analyzing an application, you observe that it contains numerous Interfaces for complex domain logic. Completing a business Function currently requires calling several of these interfaces in an order that is understood by system experts.

  Which design pattern would you suggest to refactor the code?

  A. MVC

  B. DAO

  C. Adapter

  D. Decorator

  Correct Answer: A

• Question 6:

  During a security audit, it is noted that your application is vulnerable to SQL Injection attacks.

  100% Real QandAs | 100% Real Pass

  Which two action would you perform to address this vulnerability?

  A. Use parameterized stored procedures with the embedded parameters.

  B. Add a text input validation filter to check user-supplied data.

  C. Configure user permissions in the deployment descriptor.

  D. Configure security roles in the deployment descriptor.

  E. Deploy the Internet facing nodes in a well defined demilitarized zone (DMZ) layer.

  F. Use parameterized stored procedures with the principle of least privilege.

  Correct Answer: AB

• Question 7:

  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.

  Correct Answer: C

• Question 8:

  You are designing a bank application in which automated email reminders are sent to customers every 24 hours, starting from five days prior to a payment due date until the payment is made? Which type of beans most closely match the implementation needs for this requirement?

  A. Stateful session bean

  B. Stateless session bean

  C. Managed bean

  D. Message-driven bean

  Correct Answer: D

• Question 9:

  You are integrating with a single legacy Enterprise Information System. You are interested in the transaction management capabilities of Java Connector Architecture. This new system needs the capability to invoke multiple operations against this single legacy system. these operations succeeded together or fail together as a group.

  To which minimum level of transaction management do you set your resource adapter?

  A. No transaction

  B. Local transaction 100% Real QandAs | 100% Real Pass

  C. Distributed transaction

  D. Container-managed transaction

  Correct Answer: B

• Question 10:

  Your company is creating a Java EE corporate wide workflow system in winch significant internal business events are consumed by multiple applications. Due to multi-year development plans, many of these applications do not exist yet, even at the design stage. IT has defined standard data formats for these events in the form of small XML documents. Also, the rules for how an application filters and processes events are not fixed In advance and can change over the life or the application.

  Which combination of technologies is best for distributing and consuming these events throughout the company?

  A. Relational database and JDBC

  B. HTTP client library and servlets

  C. Remote Method Invocation (RMI) and stateless session beans

  D. Java Message Service (JMS) topics and message-driven beans

  E. JMS queues and message-driven beans

  Correct Answer: D