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SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:

1. Servlet A receives a request that it forwards to servlet B within another web application in the same web container. Servlet A needs to share data with servlet B and that data must not be visible to other servlets in A's web application. In which object can the data that A shares with B be stored?

A) ServletConfig
B) HttpServletResponse
C) HttpServletRequest
D) HttpSession
E) ServletContext

2. You have a new IT manager that has mandated that all JSPs must be refactored to include no scritplet code. The IT manager has asked you to enforce this. Which deployment descriptor element will satisfy this constraint?

A) <jsp-config>
< url-pattern>*.jsp</url-pattern>
< scripting-invalid>true</scripting-invalid>
< /jsp-config>
B) <jsp-property-group>
< url-pattern>*.jsp</url-pattern>
< scripting-invalid>true</scripting-invalid>
< /jsp-property-group>
C) <jsp-property-group>
< url-pattern>*.jsp</url-pattern>
< permit-scripting>false</permit-scripting>
< /jsp-property-group>
D) <jsp-config>
< url-pattern>*.jsp</url-pattern>
< permit-scripting>false</permit-scripting>
< /jsp-config>

3. Your web application views all have the same header, which includes the <title> tag in the
< head> element of the rendered HTML. You have decided to remove this redundant HTML code from your JSPs and put it into a single JSP called /WEB-INF/jsp/header.jsp.
However, the title of each page is unique, so you have decided to use a variable called pageTitle to parameterize this in the header JSP, like this:
10. <title>${param.pageTitle}<title>
Which JSP code snippet should you use in your main view JSPs to insert the header and pass the pageTitle variable?

A) <jsp:insert page='/WEB-INF/jsp/header.jsp'>
$ {pageTitle='Welcome Page'}
< /jsp:insert>
B) <jsp:include page='/WEB-INF/jsp/header.jsp'>
< jsp:param name='pageTitle' value='Welcome Page' />
< /jsp:include>
C) <jsp:include page='/WEB-INF/jsp/header.jsp'>
$ {pageTitle='Welcome Page'}
< /jsp:include>
D) <jsp:insert page='/WEB-INF/jsp/header.jsp'>
< jsp:param name='pageTitle' value='Welcome Page' />
< /jsp:insert>
E) <jsp:include file='/WEB-INF/jsp/header.jsp'>
$ {pageTitle='Welcome Page'}
< /jsp:include>

4. A developer has created a special servlet that is responsible for generating XML content that is sent to a data warehousing subsystem. This subsystem uses HTTP to request these large data files, which are compressed by the servlet to save internal network bandwidth.
The developer has received a request from management to create several more of these data warehousing servlets. The developer is about to copy and paste the compression code into each new servlet. Which design pattern can consolidate this compression code to be used by all of the data warehousing servlets?

A) Composite Facade
B) Intercepting Filter
C) Transfer Object
D) Facade
E) View Helper

5. You need to store a floating point number, called Tsquare, in the session scope. Which two code snippets allow you to retrieve this value? (Choose two.)

A) float Tsquare = (float) session.getNumericAttribute("Tsquare");
B) float Tsquare = session.getFloatAttribute("Tsquare");
C) float Tsquare = ((Float) session.getNumericAttribute.("Tsquare")).floatValue;
D) float Tsquare = ((Float) session.getAttribute.("Tsquare")).floatValue();
E) float Tsquare = ((Float) session.getFloatAttribute.("Tsquare")).floatValue;
F) float Tsquare = (Float) session.getAttribute("Tsquare");

Solutions: