Oracle 1Z0-807 Online Practice Questions and Exam Preparation

Oracle 1Z0-807 Online Questions & Answers

• Question 1:

  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.
  A. Use JPA in the web tier only.
  C. Use your domain model components as JavaServer Faces (JSF) managed beans.

• Question 2:

  A Hot Potato anti pattern can arise from misuse of which technology combination?

  A. Bean Validation with JSF Managed Beans
  B. Messaging in the Business Tier
  C. JNDI Lookups with Global Java Naming
  D. JPA with the Web Tier
  B. Messaging in the Business Tier

• Question 3:

  A travel company re-architects its application from a two-tier to a three-tier architecture. To see what impact the new architecture has on its non-functional requirements (NFR), the company intends to build a prototype based on the new

  architecture.

  The company compares the NFR metrics associated with the new prototype against the metrics from their original two-tier solution.

  Which option is an advantage of the original two-tier solution?

  A. It has better availability because it has fewer single points of failure.
  B. It has better manageability because each client has its own copy of the application.
  C. It has better performance because each client must use its own set of domain objects.
  D. It has better scalability because each client can access the database independently of other clients.
  A. It has better availability because it has fewer single points of failure.

• Question 4:

  MedLabML is a startup firm that moves patient data between different care providers to provide a "single patient 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 message-level security.

  Which standard or API would you recommend they read?

  A. SAML 1.1
  B. Web Service Interoperability Technology
  C. XML Signature
  D. SSL
  B. Web Service Interoperability Technology

• Question 5:

  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
  C. Distributed transaction
  D. Container-managed transaction
  B. Local transaction

• Question 6:

  Which two functions are essential parts of a service oriented architecture (SOA) infrastructure?

  A. The service provider, which executes business logic in a stateless fashion
  B. The service consumer, which accesses services from the service repository
  C. The service repository, which stores software component metadata
  D. The service broker, which delivers well-defined service-level agreements
  E. The service look-up facility, which provides a central resource for naming and access
  A. The service provider, which executes business logic in a stateless fashion
  C. The service repository, which stores software component metadata

• Question 7:

  An online library wants to introduce a feature where an email notification is generated whenever a book becomes available for circulation. This notification must be sent to only those members who have expressed interest in that book. Which design pattern would you use to implement this requirement?

  A. Observer
  B. Payload Extractor
  C. Asynchronous Resource Integrator
  D. Web Service Broker
  E. Service Starter
  A. Observer

• Question 8:

  A business application that runs in an Enterprise JavaBeans (EJB) container must communicate with a transactional third-party service. The communication technology must allow changing service providers without changing the application's business model.

  Which technology would meet these requirements?

  A. Java Message Service
  B. Remote Method Invocation
  C. Simple Object Access Protocol
  D. Java Connector Architecture
  E. Java Business Integration
  A. Java Message Service

• Question 9:

  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
  A. MVC

• Question 10:

  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 finding a broad, single theme and brand image for these groups before they can do that, they need to get the users communicating with outside their current networks.

  Which Web Services pattern would you recommend they consider in building a scheme to accommodate this communication?

  A. Asynchronous Interactions
  B. PAOS Interactions
  C. Web Services Broker
  D. JMS Bridge
  A. Asynchronous Interactions