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Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. The Squeaky Bean company has decided to port their web application to a new J2EE 1.4 container. While reviewing the application, a developer realizes that in multiple places within the current application, nearly duplicate code exists that finds enterprise beans. Which pattern should be used to eliminate this duplicate code?

A) Business Delegate
B) Intercepting Filter
C) Service Locator
D) Front Controller
E) Transfer Object
F) Model-View-Controller

2. Which two prevent a servlet from handling requests? (Choose two.)

A) The servlet's init method does NOT return within a time period defined by the servlet container.
B) The servlet's init method throws a ServletException.
C) The servlet's init method sets the ServletResponse's content length to 0.
D) The servlet's init method sets the ServletResponse's content type to null.
E) The servlet's init method returns a non-zero status.

3. A custom tag is defined to take three attributes. Which two correctly invoke the tag within a JSP page? (Choose two.)

A) <prefix:myTag>
<jsp:attribute name="a">foo</jsp:attribute>
<jsp:attribute name="b">bar</jsp:attribute>
<jsp:attribute name="c">baz</jsp:attribute>
</prefix:myTag>
B) <prefix:myTag a="foo" b="bar" c="baz" />
C) <prefix:myTag>
<jsp:attribute a:foo b:bar c:baz />
</prefix:myTag>
D) <prefix:myTag>
<jsp:attribute ${"foo", "bar", "baz"} />
</prefix:myTag>
E) <prefix:myTag>
<jsp:attribute a="foo" b="bar" c="baz"/> </prefix:myTag>
F) <prefix:myTag attributes={"foo","bar","baz"} />
G) <prefix:myTag jsp:attribute a="foo" b="bar" c="baz" />

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

5. Given:
11.
<% java.util.Map map = new java.util.HashMap();
12.
request.setAttribute("map", map);
13.
map.put("a", "true");
14.
map.put("b", "false");
15.
map.put("c", "42"); %>
Which three EL expressions are valid and evaluate to true? (Choose three.)

A) ${not map.c}
B) ${map.d or map.a}
C) ${map.a and map.b or map.a}
D) ${map.false or map.true}
E) ${map['true'] or map['false']}
F) ${map.a and map.d}

Solutions: