Oracle 1Z0-807 問題集

質問 1：
Which two kinds of applications benefit from the adoption of service oriented architecture (SOA) inspired patterns and practices?
A. An application that utilizes fine-grained interfaces to provide communication to the object of a service
B. An application in which thecommunication between servicesand the business process areplatform independent.
C. An application with tightly coupled services that enable messages to flow easily
正解：C

質問 2：
Your company is considering migrating a persistence module, originally implemented as CMP entity beans, to now use JPA.
Which two statements are true?
A. The client code that accesses the CMP entity beans does not have to change.
B. Remote clients of the CMP entity beans must start using web services to access the JPA entity classes on the server.
C. JPA cannot capture all the relationships supported by CMP entity beans.
D. The JNDI name of a JPA entity class can be customized to match that of the corresponding CMP entity bean.
E. The resulting JPA persistence module can be used on both the client and the server.
正解：A,D

質問 3：
Which are the objectives of the Strategy pattern? (Choose Two)
A. To decouple an abstraction horn its implementation so that the two can vary independently
B. To define a family of algorithms, encapsulate each one, and make them interchangeable
C. To define an object that encapsulates how a set of objects interacts
D. To allow subclasses to redefine certain steps of an algorithm without changing the algorithm's structure
E. To define the skeleton of an algorithm, deferring some steps to subclasses
正解：C,D

質問 4：
You are the lead technical designer for a new B2C retail application. A key goal is to minimize design and build complexity in order to maximize speed to market.
Which three features of JPA make it the most appropriate technology to use in building the persistence layer of the application?
A. JPA ensures thread safe semantics
B. JPA does not require an EJB container
C. JPA provides vendor-neutral database access
D. JPA ensures optimal database access logic
E. JPA provides transparent scalability
F. JPA provides ACID semantics
正解：B,C,F

質問 5：
: 66
You are contracted to improve the performance of an application.
While analyzing the application, you observe the following issues:
-Tight couplingbetween client and business objects -Too manyremote method Invocationsbetween client and server
Which design pattern is best suited to improving performance?
A. Session Facade
B. Data Access Object
C. Web Service Broker
D. Service Activator
E. Value List Handler
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 6：
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-RPC using HTTP
B. JAX-WS using HTTPS
C. JAX-RS using HTTPS
D. JAX-WS using HTTP
正解：B