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

1. One of the use cases in your web application uses many session-scoped attributes. At the end of the use case, you want to clear out this set of attributes from the session object. Assume that this static variable holds this set of attribute names:
201.
private static final Set<String> USE_CASE_ATTRS;
202.
static {
203.
USE_CASE_ATTRS.add("customerOID");
204.
USE_CASE_ATTRS.add("custMgrBean");
205.
USE_CASE_ATTRS.add("orderOID");
206.
USE_CASE_ATTRS.add("orderMgrBean");
207.
}
Which code snippet deletes these attributes from the session object?

A) session.removeAll(USE_CASE_ATTRS);
B) session.deleteAllAttributes(USE_CASE_ATTRS);
C) for ( String attr : USE_CASE_ATTRS ) {
session.removeAttribute(attr);
}
D) for ( String attr : USE_CASE_ATTRS ) {
session.deleteAttribute(attr);
}
E) for ( String attr : USE_CASE_ATTRS ) { session.remove(attr); }

2. Click the Exhibit button.
A servlet sets a session-scoped attribute product with an instance of com.example.Product and forwards to a JSP.
Which two output the name of the product in the response? (Choose two.)

A) <jsp:getProperty name="product" class="com.example.Product" property="name" />
B) ${product.name}
C) <jsp:useBean id="com.example.Product" /> <%= product.getName() %>
D) <jsp:getProperty name="product" property="name" />
E) <jsp:useBean id="product" type="com.example.Product">
<%= product.getName() %>
</jsp:useBean>

3. Which two are characteristics of the Service Locator pattern? (Choose two.)

A) It improves client performance by caching context and factory objects.
B) It increases source code duplication and decreases reuse.
C) It degrades network performance due to increased access to distributed lookup services.
D) It encapsulates component lookup procedures.

4. DRAG DROP
Click the Task button.
Place the events in the order they occur.

5. Click the Exhibit button.
The Appliance class is a Singleton that loads a set of properties into a Map from an external data source. Assume:
An instance of the Appliance class exists in the application-scoped attribute, appl The appliance object includes the name property that maps to the value Cobia The request-scoped attribute, prop, has the value name.
Which two EL code snippets will display the string Cobia? (Choose two.)

A) ${appl.properties.name}
B) ${appl.properties[prop]}
C) ${appl.properties.prop}
D) ${appl.properties[name]}
E) ${appl.getProperties().get('name')}
F) ${appl.getProperties().get(prop)}

Solutions: