Oracle 1Z0-858 問題集

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

質問 2：
The Squeaky Bean company has decided to port their web application to a new J2EE 1.4 container. While reviewing the application, a developer realizes that in multiple places within the current application, nearly duplicate code exists that finds enterprise beans. Which pattern should be used to eliminate this duplicate code?
A. Intercepting Filter
B. Transfer Object
C. Front Controller
D. Business Delegate
E. Service Locator
F. Model-View-Controller
正解：E

質問 3：
You are creating a new JSP page and you need to execute some code that acts when the page is first executed, but only once. Which three are possible mechanisms for performing this initialization code? (Choose three.)
A. In the jspInit method.
B. In a JSP declaration, which includes an initializer block.
C. In the constructor of the JSP's Java code.
D. In a JSP declaration, which includes a static initializer block.
E. In the init method.
正解：A,B,D

質問 4：
DRAG DROP
Click the Task button.
Given a request from mybox.example.com, with an IP address of 10.0.1.11 on port 33086, place the appropriate ServletRequest methods onto their corresponding return values.

正解：


質問 5：
You want to create a valid directory structure for your Java EE web application, and your application uses tag files and a JAR file. Which three must be located directly in your WEBINF directory (NOT in a subdirectory of WEB-INF)? (Choose three.)
A. A directory called META-INF
B. A directory called TLDs
C. A directory called classes
D. A directory called tags
E. A directory called lib
F. The JAR file
正解：C,D,E

質問 6：
Which two prevent a servlet from handling requests? (Choose two.)
A. The servlet's init method sets the ServletResponse's content type to null.
B. The servlet's init method does NOT return within a time period defined by the servlet container.
C. The servlet's init method sets the ServletResponse's content length to 0.
D. The servlet's init method returns a non-zero status.
E. The servlet's init method throws a ServletException.
正解：B,E

質問 7：
Given the security constraint in a DD:
101.
<security-constraint>
102.
<web-resource-collection>
103.
<web-resource-name>Foo</web-resource-name>
104.
<url-pattern>/Bar/Baz/*</url-pattern>
105.
<http-method>POST</http-method>
106.
</web-resource-collection>
107.
<auth-constraint>
108.
<role-name>DEVELOPER</role-name>
109.
</auth-constraint>
110.
</security-constraint>
And given that "MANAGER" is a valid role-name, which four are true for this security constraint? (Choose four.)
A. DEVELOPER can do a GET on resources in the /Bar/Baz directory.
B. MANAGER can do a POST on any resource in the /Bar/Baz directory.
C. DEVELOPER can do only a POST on resources in the /Bar/Baz directory.
D. MANAGER can do a TRACE on any resource in the /Bar/Baz directory.
E. MANAGER can do a GET on resources in the /Bar/Baz directory.
F. DEVELOPER can do a TRACE on any resource in the /Bar/Baz directory.
正解：A,D,E,F

質問 8：
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 in the servlet to the JSP for view generation. This information must NOT be accessible to any other servlet, JSP or session in the webapp. Which two techniques can you use to accomplish this goal? (Choose two.)
A. Add parameters to the JSP's URL when generating the request dispatcher.
B. Add attributes to the session object.
C. Use the pageContext object to add request attributes.
D. Add attributes on the request object.
E. Add parameters to the request object.
正解：A,D