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Java EE 6 Enterprise Architect Certified Master Exam

Question No: 51

Which three principles are best practices when implementing a logging strategy for an enterprise application?

  1. Never print log messages to the console window.

  2. Use the appropriate logger level for logging information.

  3. Log messages for every method entry and exit.

  4. Include programmer-specific data in the log messages.

  5. Include the thread name and Java class name in log messages.

Answer: B,C,D

Question No: 52

Which two are primary concerns for a service-oriented architecture (SOA)?

  1. Low cohesion

  2. Loose coupling

  3. Session handling

  4. Well defined contracts

Answer: B,D

Question No: 53

Your company is considering migrating a persistence module, originally implemented as

CMP entity beans, to now use JPA. Which two statements are true?

  1. Each CMP entity bean can be mapped to a single JPA entity class.

  2. The client code that accesses the CMP entity beans does not have to change.

  3. IPA cannot capture all the kinds of relationships supported by CMP entity beans.

  4. The resulting IPA persistence module can be used on both the client and the server.

  5. The JNDI name of a JPA entity class can be customized to match that of the corresponding CMP entity bean.

  6. Remote clients of the CMP entity beans must start using web services to access the JPA entity classes on the server.

Answer: A,D

Question No: 54

Your application produces messages by client applications. The number of clients interested in the messages varies continuously at run time. Any client can process any message, but a message must be processed exactly once.

How should the messages be delivered to the clients?

  1. Using a Java Message Service (JMS) topic

  2. Using a Java Message Service (JMS) queue

  3. Using XML over HTTP

  4. Using a Simple Object Access Protocol (SOAP) web service

Answer: B

Question No: 55

Which two security threats are negated by encrypting network transactions with Transport Layer Security (TLS)?

  1. SQL injection

  2. Session hijacking

  3. Man in the middle

  4. Cross-site scripting

  5. Denial of service

Answer: B,C

Question No: 56

Which two kinds of applications benefit from the adoption of service oriented architecture (SOA) inspired patterns and practices?

  1. An application that retains legacy systems while evolving to accommodate future business demands

  2. An application with tightly coupled services that enable messages to flow easily

  3. An application that utilizes fine-grained interfaces to provide communication to the object of a service

  4. An application in which the communication between services and the business process are platform independent.

Answer: A,D

Question No: 57

Your company provides a marketplace for industrial chemicals. You are required to offer accurate pricing and quantities to all marketplace users.

Marketplace users are globally distributed.

What is the most appropriate technology to use to satisfy this requirement?

  1. Server-side distribution using JAX-WS

  2. Client-side polling using JAX-RPC

  3. Web services using REST

  4. An enterprise messaging system

Answer: C

Question No: 58

Which two statements are true about delegation as an Object-Oriented Design technique?

  1. It is applied to a system only at compile time.

  2. It is an essential element of the Singleton pattern.

  3. It allows you to replace Inheritance with composition.

  4. In Java technology, it is always implemented through the use of generics.

  5. It always requires that at least two objects are involved in handling a request.

Answer: C,E

Question No: 59

A company provides call center support for corporations world-wide. Each agent in the call center can be assigned to multiple call center customers. All the company#39;s customers use Windows based user interfaces and it has Just signed a new customer that uses a Java EE back end and wants a rich interface.

The company is developing a user interface for the new customer with the following requirements:

->Customer service representatives (CSRs) must be able to work with minimal training on the application.

->CSRs must be able to switch between call center systems quickly.

->Screens must have a windows look and feel.

->2000 agents spread across four locations must be able to use the system.

Which recommendation would you make to this company about the user interface (UI)?

  1. Write the UI using JSP and JSTL.

  2. Write the UI using JSPs with embedded script lets.

  3. Write the UI using AJAX, Accessing servlets directly.

  4. Write the UI using Java Swing and describe using JNLP.

Answer: D

Question No: 60

Which two use cases are best suited to the RPC style of messaging using Simple Object Access Protocol (SOAP)?

  1. Processing large sized communication messages

  2. Implementing line grained services

  3. Validating custom data types

  4. Implementing asynchronous web services

  5. Executing long running multi-part processes

Answer: B,C

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