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

1. You are designing an n-tier Java EE application. You have already decided that some of your JSPs will need to get data from a Customer entity bean. You are trying to decide
whether to use a Customer stub object or a Transfer Object. Which two statements are true? (Choose two.)

A) The stub will increase network traffic.
B) In both cases, the JSPs can use EL expressions to get data.
C) The Transfer Object will decrease data staleness.
D) Only the Transfer Object will need to use a Business Delegate.
E) The stub will increase the logic necessary in the JSPs.
F) Using the stub approach allows you to design the application without using a Service Locator.

2. A custom JSP tag must be able to support an arbitrary number of attributes whose names are unknown when the tag class is designed. Which two are true? (Choose two.)

A) The echo tag handler must define the setAttribute(String key, String value) method.
B) The <body-content> element in the echo tag TLD must have the value JSP.
C) The class implementing the echo tag handler must implement the javax.servlet.jsp.tagext.IterationTag interface.
D) The <dynamic-attributes>true</dynamic-attributes> element must appear in the echo tag TLD.
E) The class implementing the echo tag handler must implement the javax.servlet.jsp.tagext.DynamicAttributes interface.

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

4. You need to store a Java long primitive attribute, called customerOID, into the session scope. Which two code snippets allow you to insert this value into the session? (Choose two.)

A) long customerOID = 47L; session.setAttribute("customerOID", new Long(customerOID));
B) long customerOID = 47L; session.setAttribute("customerOID", customerOID);
C) long customerOID = 47L; session.setLongAttribute("customerOID", customerOID);
D) long customerOID = 47L; session.setNumericAttribute("customerOID", new Long(customerOID));
E) long customerOID = 47L; session.setNumericAttribute("customerOID", customerOID);
F) long customerOID = 47L; session.setLongAttribute("customerOID", new Long(customerOID));

5. In a JSP-centric web application, you need to create a catalog browsing JSP page. The catalog is stored as a List object in the catalog attribute of the webapp's ServletContext object. Which scriptlet code snippet gives you access to the catalog object?

A) <% List catalog = servletContext.getAttribute("catalog"); %>
B) <% List catalog = application.getAttribute("catalog"); %>
C) <% List catalog = context.getAttribute("catalog"); %>
D) <% List catalog = config.getAttribute("catalog"); %>

Solutions: