SUN 310-083 : Sun Certified Web Component Developer for J2EE 5

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

1. Which two classes or interfaces provide a getSession method? (Choose two.)

A) javax.servlet.http.HttpSessionBindingEvent
B) javax.servlet.http.HttpServletRequest
C) javax.servlet.http.HttpSessionContext
D) javax.servlet.http.HttpSessionAttributeEvent
E) javax.servlet.http.HttpServletResponse

2. Your web site has many user-customizable features, for example font and color preferences on web pages. Your IT department has already built a subsystem for user preferences using Java SE's lang.util.prefs package APIs and you have been ordered to reuse this subsystem in your web application. You need to create an event listener that stores the user's Preference object when an HTTP session is created. Also, note that user identification information is stored in an HTTP cookie.
Which partial listener class can accomplish this goal?

A) public class UserPrefLoader implements HttpSessionListener {
public void sessionInitialized(HttpSessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getHttpSession().setAttribute("prefs", userPrefs);
}
// more code here
}
B) public class UserPrefLoader implements HttpSessionListener {
public void sessionCreated(HttpSessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().setAttribute("prefs", userPrefs);
}
// more code here
}
C) public class UserPrefLoader implements SessionListener {
public void sessionCreated(SessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().addAttribute("prefs", userPrefs);
}
// more code here
}
D) public class UserPrefLoader implements SessionListener {
public void sessionInitialized(SessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().addAttribute("prefs", userPrefs);
}
// more code here
}

3. Which method must be used to encode a URL passed as an argument to
HttpServletResponse.sendRedirect when using URL rewriting for session tracking?

A) ServletResponse.encodeRedirectURL
B) HttpServletResponse.encodeRedirectURL
C) HttpServletResponse.encodeURL
D) ServletResponse.encodeURL

4. Given:
1 0. public void service(ServletRequest request,
1 1. ServletResponse response) {
1 2. ServletInputStream sis =
1 3. // insert code here
1 4. }
Which retrieves the binary input stream on line 13?

A) request.getWriter();
B) request.getResourceAsStream();
C) request.getInputStream();
D) request.getResourceAsStream(ServletRequest.REQUEST);
E) request.getReader();

5. Click the Exhibit button.
Given the HTML form:
1 . <html>
2 . <body>
3 . <form action="submit.jsp">
4 . Name: <input type="text" name="i1"><br>
5 . Price: <input type="text" name="i2"><br>
6 . <input type="submit">
7 . </form>
8 . </body>
9 . </html>
Assume the product attribute does NOT yet exist in any scope.
Which code snippet, in submit.jsp, instantiates an instance of com.example.Product that contains the results of the form submission?

A) <jsp:useBean id="com.example.Product" />
< jsp:setProperty name="product" property="*" />
B) <jsp:useBean id="product" class="com.example.Product">
< jsp:setProperty name="product" property="name"
param="i1" />
< jsp:setProperty name="product" property="price"
param="i2" />
< /jsp:useBean>
C) <jsp:useBean id="product" class="com.example.Product" />
$ {product.name = param.i1}
$ {product.price = param.i2}
D) <jsp:useBean id="product" type="com.example.Product">
< jsp:setProperty name="product" property="name"
value="<%= request.getParameter( "i1" ) %>" />
< jsp:setProperty name="product" property="price"
value="<%= request.getParameter( "i2" ) %>" />
< /jsp:useBean>

Solutions: