Oracle Java Technology 1Z0-858

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

1. Given:
11.
<%
12.
request.setAttribute("vals", new String[]{"1","2","3","4"});
13.
request.setAttribute("index", "2");
14.
%>
15.
<%-- insert code here --%>
Which three EL expressions, inserted at line 15, are valid and evaluate to "3"? (Choose three.)

A) ${vals.index}
B) ${vals[index]}
C) ${vals}[index]
D) ${vals[vals[index-1]]}
E) ${vals["2"]}
F) ${vals.(vals.index)}
G) ${vals.2}

2. Squeaky Beans Inc. hired an outside consultant to develop their web application. To finish the job quickly, the consultant created several dozen JSP pages that directly communicate with the database. The Squeaky business team has since purchased a set of business objects to model their system, and the Squeaky developer charged with maintaining the web application must now refactor all the JSPs to work with the new system. Which pattern can the developer use to solve this problem?

A) Intercepting Filter
B) Service Locator
C) Business Delegate
D) Transfer Object

3. Which interface must a class implement so that instances of the class are notified after any object is added to a session?

A) javax.servlet.http.HttpSessionValueListener
B) javax.servlet.http.HttpSessionListener
C) javax.servlet.http.HttpSessionAttributeListener
D) javax.servlet.http.HttpSessionBindingListener

4. Your web application uses a simple architecture in which servlets handle requests and then forward to a JSP using a request dispatcher. You need to pass information calculated by the servlet to the JSP; furthermore, that JSP uses a custom tag and must also process this information. This information must NOT be accessible to any other servlet, JSP or session in the webapp. How can you accomplish this goal?

A) Store the data in a public instance variable in the servlet.
B) Add an attribute to the request object before using the request dispatcher.
C) Add an attribute to the context object before using the request dispatcher.
D) This CANNOT be done as the tag handler has no means to extract this data.

5. Which statement is true about web container session management?

A) The JSESSIONID cookie is stored permanently on the client so that a user may return to the web application and the web container will rejoin that session.
B) If the web application uses HTTPS, then the web container may use the data on the HTTPS request stream to identify the client.
C) Access to session-scoped attributes is guaranteed to be thread-safe by the web container.
D) To activate URL rewriting, the developer must use the HttpServletResponse.setURLRewriting method.

Solutions: