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Oracle 1z0-807 Exam Dumps - Actual Questions Answers

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1z0-807 Questions and Answers

Question # 1

Which four services are guaranteed to be present in a specification compliant Java EE container?

A.

B.Persistence

B.

Naming and messaging

C.

D.Remote connectivity

D.

Failover

E.

F.Lifecycle management

F.

Multithreading handling

G.

Load balancing

Question # 2

Which are the objectives of the Strategy pattern? (Choose Two)

A.

To define an object that encapsulates how a set of objects interacts

B.

To define the skeleton of an algorithm, deferring some steps to subclasses

C.

To decouple an abstraction horn its implementation so that the two can vary independently

D.

To define a family of algorithms, encapsulate each one, and make them interchangeable

E.

To allow subclasses to redefine certain steps of an algorithm without changing the algorithm's structure

Question # 3

You are designing a new subsystem to store and scratch for user commands in a fashion company’s website. On class, CommentManager, is responsible for accessing comment data and providing read-only access to other objects in the subsystem.

Which two implementation details are necessary for the Cementmanager class?

A.

All the accessor and mutator methods in CommentManager must have the static modifier in their declarations.

B.

C. The comments must beassessabledirectly only within CommentManager.

C.

CommentManager should be a singleton object.

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