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

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SUN 310-083 Exam Syllabus Topics:

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

1. Which three are true about TLD files? (Choose three.)

A) A tag handler's attribute must be included in the TLD file only if the attribute can accept request-time expressions.
B) The web container can generate an implicit TLD file for a tag library comprised of both simple tag handlers and tag files.
C) When deployed inside a JAR file, TLD files must be in the META-INF directory, or a subdirectory of it.
D) The web container can automatically extend the tag library map described in a web.xml file by including entries extracted from the web application's TLD files.
E) The web container recognizes TLD files placed in any subdirectory of WEB-INF.

2. Which two are characteristics of the Intercepting Filter pattern? (Choose two.)

A) It forces resource authentication to be distributed across web components.
B) It allows preprocessing and postprocessing on the incoming requests and outgoing responses.
C) It can be added and removed unobtrusively, without requiring changes to existing code.
D) It provides centralized request handling for incoming requests.
E) It reduces coupling between presentation-tier clients and underlying business services.

3. You have created a JSP that includes instance variables and a great deal of scriptlet code.
Unfortunately, after extensive load testing, you have discovered several race conditions in your JSP scriptlet code. To fix these problems would require significant recoding, but you are already behind schedule. Which JSP code snippet can you use to resolve these concurrency problems?

A) <%@ page isThreadSafe='false' %>
B) <%@ page useSingleThreadModel='true' %>
C) <%@ page implements='SingleThreadModel' %>
D) <%@ implements SingleThreadModel %>
E) <%! implements SingleThreadModel %>

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

5. A developer has created a special servlet that is responsible for generating XML content that is sent to a data warehousing subsystem. This subsystem uses HTTP to request these large data files, which are compressed by the servlet to save internal network bandwidth.
The developer has received a request from management to create several more of these data warehousing servlets. The developer is about to copy and paste the compression code into each new servlet. Which design pattern can consolidate this compression code to be used by all of the data warehousing servlets?

A) View Helper
B) Composite Facade
C) Transfer Object
D) Facade
E) Intercepting Filter

Solutions: