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

1. Given:
6.<% int[] nums = {42, 420, 4200};
7.request.setAttribute("foo", nums); %>
Which two successfully translate and result in a value of true? (Choose two.)

A) ${requestScope['foo'][1] = 420}
B) ${(requestScope['foo'][0] lt 50) && (3 gt 2)}
C) ${true or false}
D) ${requestScope[foo][0] > 500}

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

3. Click the Exhibit button.
As a maintenance feature, you have created this servlet to allow you to upload and remove files on your web server. Unfortunately, while testing this servlet, you try to upload a file using an HTTP request and on this servlet, the web container returns a 404 status.
What is wrong with this servlet?

A) The doPut and doDelete methods do NOT map to the proper HTTP methods.
B) The servlet constructor must NOT have any parameters.
C) The servlet needs a service method to dispatch the requests to the helper methods.
D) HTTP does NOT support file upload operations.

4. Given an HttpServletRequest request and HttpServletResponse response, which sets a cookie "username" with the value "joe" in a servlet?

A) response.addCookie(new Cookie("username", "joe"))
B) request.setCookie("username", "joe")
C) request.addCookie(new Cookie("username", "joe"))
D) response.addCookie("username", "joe")
E) response.addHeader(new Cookie("username", "joe"))
F) request.addHeader(new Cookie("username", "joe"))
G) request.addCookie("username", "joe")

5. 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 add the string id=<sessionid> to the end of every URL to ensure that the conversation with the browser can continue.
B) The developer must provide an alternate mechanism for managing sessions and abandon the HttpSession mechanism entirely.
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.

Solutions: