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

1. Which two statements are true about the security-related tags in a valid Java EE deployment descriptor? (Choose two.)

A) A given <web-resource-collection> tag can contain from zero to many <url-pattern> tags.
B) A given <auth-constraint> tag can apply to only one <web-resource-collection> tag.
C) It is possible to construct a valid <security-constraint> tag such that, for a given resource, no user roles can access that resource.
D) Every <security-constraint> tag must have at least one <http-method> tag.
E) A <security-constraint> tag can have many <web-resource-collection> tags.

2. You are building a web application with a scheduling component. On the JSP, you need to show the current date, the date of the previous week, and the date of the next week. To help you present this information, you have created the following EL functions in the 'd' namespace:
name: curDate; signature: java.util.Date currentDate()
name: addWeek; signature: java.util.Date addWeek(java.util.Date, int)
name: dateString; signature: java.util.String getDateString(java.util.Date)
Which EL code snippet will generate the string for the previous week?

A) ${d:dateString(d:addWeek(d:curDate(), -1))}
B) ${d:dateString(addWeek(curDate(), -1))}
C) ${d:dateString[d:addWeek[d:curDate[], -1]]}
D) ${d:dateString[addWeek[curDate[], -1]]}

3. A developer is designing a multi-tier web application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition, because the business and resource tiers are distributed, the application needs to minimize the inter-tier network traffic related to servicing client requests. Which design patterns, working together, address these issues?

A) Front Controller and Transfer Object
B) Model-View-Controller and Intercepting Filter
C) Front Controller and Service Locator
D) Business Delegate and Intercepting Filter
E) Business Delegate and Transfer Object

4. You are building a dating web site. The client's date of birth is collected along with lots of other information. You have created an EL function with the signature:
calcAge(java.util.Date):int and it is assigned to the name, age, in the namespace, funct. In one of your JSPs you need to print a special message to clients who are younger than 25.
Which EL code snippet will return true for this condition?

A) ${funct:age(client.birthDate) < 25}
B) ${calcAge(client.birthDate) < 25}
C) ${calcAge[client.birthDate] < 25}
D) ${funct:age[client.birthDate] < 25}
E) ${funct:calcAge(client.birthDate) < 25}
F) ${funct:calcAge[client.birthDate] < 25}

5. Given in a single JSP page:
< %@ taglib prefix='java' uri='myTags' %>
< %@ taglib prefix='JAVA' uri='moreTags' %>
Which two are true? (Choose two.)

A) For the tag usage <java:tag1/>, the tag1 must be unique in the union of tag names in
'myTags' and 'moreTags'.
B) A translation error occurs because the prefix is considered identical by the web container.
C) The prefix 'java' is reserved.
D) The URI 'myTags' must be properly mapped to a TLD file by the web container.

Solutions: