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Home Oracle 1z0-807

Oracle 1z0-807 Exam Practice Questions (P. 4)

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Question #16
Which two statements are true about Java integration technologies?
  1. A
    Remote Method Invocation (RMI) helps to connect subsystems in a loosely coupled manner.
  2. B
    Java Message Service (JMS) helps in synchronous messaging between Java and non-Java systems.
  3. C
    JMS helps to broadcast messages to multiple Java-based receivers.
  4. D
    Java Connector Architecture (JCA) helps to integrate with heterogeneous legacy enterprise information systems.

Correct Answer:
CD

Question #17
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?
  1. A
    It has better availability because it has fewer single points of failure.
  2. B
    It has better manageability because each client has its own copy of the application.
  3. C
    It has better performance because each client must use its own set of domain objects.
  4. D
    It has better scalability because each client can access the database independently of other clients.

Correct Answer:
A

Question #18
Which two statements describe the contact between an Enterprise JavaBeans (EJB) container and the EJBs that it hosts?
  1. A
    The container provides automatic logging of all exceptions and errors generated by EJB code.
  2. B
    The container provides a transparent scaling mechanism to handle spikes in demand.
  3. C
    An EJB can extend its services, such as security, to improve performance.
  4. D
    The container has a well defined lifecycle model for each EJB type.

Correct Answer:
BD

Question #19
What are two consequences of using the Composite View pattern?
  1. A
    Improves performance
  2. B
    Avoids duplicate content
  3. C
    Forces a whole-part dependency
  4. D
    Allows tables to be reused in multiple locations
  5. E
    Restricts all sub views to have a consistent view technology

Correct Answer:
BD

Question #20
Which option describes the design relationship between session beans and entity beans?
  1. A
    Aggregation
  2. B
    Separation of concerns
  3. C
    Common reuse principle
  4. D
    Liskov substitution principle
  5. E
    Interface segregation principle

Correct Answer:
B

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