Oracle 1Z0-807 問題集

質問 1：
A company must honor a service-level agreement (SLA) for its application, which states all database requests must execute within three seconds.
Users complain that some requests take longer than five seconds to complete. You have been contracted to fix the problem.
Which course of action do you recommend?
A. Define a plan for isolating the bottleneck, and define indicators that will measure performance under a test load.
B. Add servers to distribute the load.
C. Upgrade the application server and the operating system.
D. Modify the program to implement multi threading and an event-driven design.
正解：A

質問 2：
Which two security threats are negated by encrypting network transactions with Transport Layer Security (TLS)?
A. Session hijacking
B. Denial of service
C. Man in the middle
D. SQL injection
E. Cross-site scripting
正解：A,C

質問 3：
You are asked to propose a software deployment strategy that will reduce a client make deploying and testing their software stack more efficient.
Which element would you include in your proposal?
A. Standard unit testing software
B. Horizontally scalable platform
C. Virtualized platform
D. Vertically scalable platform
正解：C

質問 4：
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. CommentManager should be a singleton object.
B. All the accessor and mutator methods in CommentManager must have the static modifier in their declarations.
C. The comments must beassessabledirectly only within CommentManager.
正解：A,B

質問 5：
You are the architect of an application that reads from and writes to multiple systems. The application must participate in an existing transaction to update a database using JDBC, and also invoke a transactional method on a remote system as part of the same transaction.
Which two technologies would you suggest, to access remote system, for this application?
A. Remote Method Invocation (RMI)
B. Java Message Service (JMS)
C. Simple Object Access Protocol (SOAP)
正解：B,C

質問 6：
Which statement is true about the use of security-related annotations in an enterprise bean?
A. They can be used to change an authentication mechanism.
B. They can be used to specify permissions only on business methods.
C. They can be used to specify permissions on a class or its business methods.
D. They can be used to acquire a secure connection using SSL.
E. They can be inherited from a parent abstract class.
正解：C