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NO.1 Your web application requires access to several different services, so you created a Service Locator
class to be used by the UI developers on the team. New services with different interfaces are occasionally
added. Unfortunately, the caching benefits of the Service Locator class are NOT being realized because a
new instance of this class is being created in every backing bean method that requires a service. Which
pattern should you apply to eliminate this problem?
A. Bridge
B. Singleton
C. Prototype
D. Factory Method
E. Business Delegate
Answer: B
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NO.2 Which three are parts of a SOAP message? (Choose three.)
A. SOAP body
B. SOAP endpoint
C. SOAP headers
D. SOAP handlers
E. SOAP attachments
Answer: A,C,E
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NO.3 An online sporting goods store's web application uses HTTPSession to store shopping carts.
When the application is initially deployed, the business plan predicts only a few customers will access the
site. Over time, the store projects a steady increase in volume. The deployment plan calls for a single web
container in the initial deployment. As demand increases, the plan calls for multiple web containers on
separate hardware with clustered HTTPSession objects. Which two principles will help the application
meet the requirements and optimize performance? (Choose two.)
A. The application should store as much as possible in HTTPSession objects.
B. The application should NOT make frequent updates to HTTPSession objects.
C. The application should make coarse-grained updates to HTTPSession objects.
D. The application should create new HTTPSession objects instead of updating existing objects.
Answer: B,C
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NO.4 What are the three primary roles in a web service interaction? (Choose three.)
A. Broker
B. Facade
C. Provider
D. Decorator
E. Requestor
F. Interceptor
Answer: A,C,E
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NO.5 A company has a web service that provides the most recent price for stocks, mutual funds, and
commodities. The company has the only web service that allows a person to check prices on all three
financial assets with one call. Its system does not store this information but sends individual calls to each
of the primary vendors for an asset and then aggregates the response to the requester. The company has
committed to support a non-functional requirement (NFR) for performance that states it must process all
requests within three seconds and each of the three vendors is obligated to support the NFR as dictated
by the company. Where, in the message flow, is it appropriate to measure whether all the NFRs are met?
A. when a request is received and a response is sent to the requester
B. when a request is received, first call to vendor, last response from vendors, response is sent to a
requester
C. when a requester sends a request, the request is received, each call to vendor, each
response from vendor, requester receives response
D. when a request is received, each call to vendor, each response from a vendor, a response is sent to a
requester
Answer: D
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NO.6 A developer creates a Java web service to be used by consumers in an SOA. This SOA uses a UDDI
service registry. How can the developer make the new service available to consumers?
A. Deploy to the registry using JAXR
B. Publish to the registry using JAXR
C. Query the registry using JAX-RPC
D. Target the registry using JAX-RPC
Answer: B
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NO.7 A stock trading company is writing a new application for stock market forecasting. A significant portion of
the work required by the business logic involves navigating through the persistent object model. As lead
architect on this project, you have chosen JPA over EJB2 entity beans to implement these persistent
objects. You have done this to maximize performance when navigating through the model. Why does JPA
offer better performance for this task.?
A. JPA guarantees referential integrity at the object level.
B. JPA allows the application to specify lazy or eager retrievals.
C. JPA simplifies the source code that implements the object model.
D. The guaranteed referential integrity in EJB2 entity beans is expensive.
Answer: B
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NO.8 With the release of a new product line, there has been a significant increase in the volume of
transactions on your web site. You need to scale your application and manage session failover. What is
the best option for scalability?
A. Add additional web servers and application servers
B. Introduce a High Availability pair and utilize sticky sessions
C. Add additional application servers and implement DNS round robin
D. Add additional application servers and use clustered HttpSession
Answer: D
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