Oracle 1Z0-864 - Questions & Answers
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What are the three primary roles in a web service interaction? (Choose three.)
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 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?
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?
You are asked to architect an SOA solution that leverages Java web services. The architecture needs to be flexible and allow for the SOAP 1.1, SOAP 1.2, and REST implementations.
Which Java EE technology should you use?
You are architecting an online ordering application with these requirements: Users access the system over the Internet using HTML.
An email message is sent to the user confirming the order. Users must log in and are validated using LDAP.
The product catalog is stored in a relational database. All orders are logged to the internal fulfillment system.
Orders must not be lost.
Which Java EE technology should be used to send orders to the fulfillment system?
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.)
You are writing a utility that searches for existing web services provided by large companies through UDDI. Your web site allows the user to input search criteria using event-driven, state managed GUI screens, performs the search, and displays them in a formatted HTML page.
Which technologies would you use for this application?
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 Java web component, EJB component, or another web service can be a client to a web service.
Which Java API can the client use to access the web service through a Service Endpoint Interface?