Oracle 1Z0-858 問題集

質問 1：
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.setNumericAttribute("customerOID", new Long(customerOID));
B. long customerOID = 47L; session.setLongAttribute("customerOID", customerOID);
C. long customerOID = 47L; session.setAttribute("customerOID", new Long(customerOID));
D. long customerOID = 47L; session.setNumericAttribute("customerOID", customerOID);
E. long customerOID = 47L; session.setAttribute("customerOID", customerOID);
F. long customerOID = 47L; session.setLongAttribute("customerOID", new Long(customerOID));
正解：C,E

質問 2：
DRAG DROP
Click the Task button.
Place the XML elements in the web application deployment descriptor solution to configure a servlet context event listener named com.example.MyListener.

正解：


質問 3：
DRAG DROP
Click the Task button.
Given a servlet mapped to /control, place the correct URI segment returned as a String on the corresponding HttpServletRequest method call for the URI: /myapp/control/processorder.

正解：


質問 4：
Which three are true about the HttpServletRequestWrapper class? (Choose three.)
A. The HttpServletRequestWrapper can be used to extend the functionality of a servlet request.
B. The HttpServletRequestWrapper is an example of the Decorator pattern.
C. An HttpServletRequestWrapper may be used only by a class implementing the javax.servlet.Filter interface.
D. A subclass of HttpServletRequestWrapper CANNOT modify the behavior of the getReader method.
E. An HttpServletRequestWrapper CANNOT be used on the request passed to the RequestDispatcher.include method.
F. An HttpServletRequestWrapper may modify the header of a request within an object implementing the javax.servlet.Filter interface.
正解：A,B,F

質問 5：
You are building a web application that will be used throughout the European Union; therefore, it has significant internationalization requirements. You have been tasked to create a custom tag that generates a message using the java.text.MessageFormat class. The tag will take the resourceKey attribute and a variable number of argument attributes with the format, arg<N>. Here is an example use of this tag and its output:
<t:message resourceKey='diskFileMsg' arg0='MyDisk' arg1='1247' />
generates:
The disk "MyDisk" contains 1247 file(s).
Which Simple tag class definition accomplishes this goal of handling a variable number of tag attributes?
A. The Simple tag model does NOT support a variable number of attributes.
B. public class MessageTag extends SimpleTagSupport
implements DynamicAttributes {
private Map attributes = new HashMap();
public void setDynamicAttribute(String uri, String name,
Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
C. public class MessageTag extends SimpleTagSupport
implements VariableAttributes {
private Map attributes = new HashMap();
public void setVariableAttribute(String uri,
String name, Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
D. public class MessageTag extends SimpleTagSupport
implements DynamicAttributes {
private Map attributes = new HashMap();
public void putAttribute(String name, Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
E. public class MessageTag extends SimpleTagSupport
implements VariableAttributes {
private Map attributes = new HashMap();
public void putAttribute(String name, Object value) {
this.attributes.put(name, value);
}
// more tag handler methods
}
正解：B

質問 6：
You need to create a servlet filter that stores all request headers to a database for all requests to the web application's home page "/index.jsp". Which HttpServletRequest method allows you to retrieve all of the request headers?
A. java.util.Iterator getHeaderNames()
B. java.util.Enumeration getRequestHeaders()
C. String[] getHeaderNames()
D. java.util.Enumeration getHeaderNames()
E. java.util.Iterator getRequestHeaders()
F. String[] getRequestHeaders()
正解：D