Oracle 1Z0-858 問題集

質問 1：
A developer is designing a multi-tier web application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition, the application needs to find, in a transparent manner, the heterogeneous business components used to service the client's requests. Which design patterns, working together, address these issues?
A. Business Delegate and Transfer Object
B. Model-View-Controller and Intercepting Filter
C. Intercepting Filter and Transfer Object
D. Business Delegate and Service Locator
E. Front Controller and Business Delegate
正解：D

質問 2：
Your web application requires the ability to load and remove web files dynamically to the web container's file system. Which two HTTP methods are used to perform these actions? (Choose two.)
A. DESTROY
B. PUT
C. REMOVE
D. DELETE
E. POST
F. SEND
正解：B,D

質問 3：
Your IT department is building a lightweight Front Controller servlet that invokes an application logic object with the interface:
public interface ApplicationController {
public String invoke(HttpServletRequest request)
}
The return value of this method indicates a symbolic name of the next view. From this name, the Front Controller servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or a path relative to the current request. Next, the Front Controller servlet must send the request to this JSP to generate the view. Assume that the servlet variable request is assigned the current HttpServletRequest object and the variable context is assigned the webapp's ServletContext.
Which code snippet of the Front Controller servlet accomplishes this goal?
A. Dispatcher view = context.getDispatcher(viewURL); view.forwardRequest(request, response);
B. RequestDispatcher view = request.getRequestDispatcher(viewURL);
view.forward(request, response);
C. Dispatcher view = request.getDispatcher(viewURL); view.forwardRequest(request, response);
D. RequestDispatcher view = context.getRequestDispatcher(viewURL); view.forward(request, response);
正解：B

質問 4：
Which three are valid URL mappings to a servlet in a web deployment descriptor? (Choose three.)
A. /MyServlet
B. MyServlet
C. */*
D. /MyServlet/*
E. MyServlet/*.jsp
F. *.do
正解：A,D,F

質問 5：
Assume a JavaBean com.example.GradedTestBean exists and has two attributes. The attribute name is of type java.lang.String and the attribute score is of type java.lang.Integer.
An array of com.example.GradedTestBean objects is exposed to the page in a requestscoped attribute called results. Additionally, an empty java.util.HashMap called resultMap is placed in the page scope.
A JSP page needs to add the first entry in results to resultMap, storing the name attribute of the bean as the key and the score attribute of the bean as the value.
Which code snippet of JSTL code satisfies this requirement?
A. <c:set var="resultMap" property="${results[0].name}"
value="${results[0].score}" />
B. <c:set target="${resultMap}" property="${results[0].name}"
value="${results[0].score}" />
C. <c:set var="resultMap" property="${results[0].name}">
${results[0].value}
</c:set>
D. ${resultMap[results[0].name] = results[0].score}
E. <c:set var="${resultMap}" key="${results[0].name}"
value="${results[0].score}" />
正解：B

質問 6：
In your web application, you need to execute a block of code whenever the session object is first created. Which design will accomplish this goal?
A. Create a Filter class, call the getSession(false) method, and if the result was null, then execute that block of code.
B. Create an HttpSessionListener class and implement the sessionCreated method with that block of code.
C. Create an HttpSessionListener class and implement the sessionInitialized method with that block of code.
D. Create an HttpSessionActivationListener class and implement the sessionCreated method with that block of code.
E. Create a Filter class, call the getSession(true) method, and if the result was NOT null, then execute that block of code.
正解：B