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

1. A developer for the company web site has been told that users may turn off cookie support in their browsers. What must the developer do to ensure that these customers can still use the web application?

A) The developer must provide an alternate mechanism for managing sessions and abandon the HttpSession mechanism entirely.
B) The developer must add the string ?id=<sessionid> to the end of every URL to ensure that the conversation with the browser can continue.
C) The developer must ensure that every URL is properly encoded using the appropriate
URL rewriting APIs.
D) The developer can ignore this issue. Web containers are required to support automatic
URL rewriting when cookies are not supported.

2. DRAG DROP
Click the Task button.
Place the corresponding resources and directories in the proper web application deployment structure.

3. Which two are characteristics of the Transfer Object design pattern? (Choose two.)

A) It increases network performance introducing multiple fine-grained remote requests which return very small amounts of data.
B) It reduces network traffic by collapsing multiple remote requests into one.
C) It increases the complexity of the remote interface by removing coarse-grained methods.
D) It increases the complexity of the design due to remote synchronization and version control issues.

4. You are creating a JSP page to display a collection of data. This data can be displayed in several different ways so the architect on your project decided to create a generic servlet that generates a comma-delimited string so that various pages can render the data in different ways. This servlet takes on request parameter: objectID. Assume that this servlet is mapped to the URL pattern: /WEB-INF/data.
In the JSP you are creating, you need to split this string into its elements separated by commas and generate an HTML <ul> list from the data.
Which JSTL code snippet will accomplish this goal?

A) <c:import varReader='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString.split(",")}' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>
B) <c:import var='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString}' delims=',' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>
C) <c:import varReader='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString}' delims=',' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>
D) <c:import var='dataString' url='/WEB-INF/data'>
< c:param name='objectID' value='${currentOID}' />
< /c:import>
< ul>
< c:forTokens items'${dataString.split(",")}' var='item'>
< li>${item}</li>
< /c:forTokens>
< /ul>

5. Given:
1 1. <% java.util.Map map = new java.util.HashMap();
1 2. request.setAttribute("map", map);
1 3. map.put("a", "b");
1 4. map.put("b", "c");
1 5. map.put("c", "d"); %>
1 6. <%-- insert code here --%>
Which three EL expressions, inserted at line 16, are valid and evaluate to "d"? (Choose three.)

A) ${map[c]}
B) ${map[map.b]}
C) ${map.c}
D) ${map.(map.b)}
E) ${map["c"]}
F) ${map.map.b}

Solutions: