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最新的 Java Technology 1Z0-858 免費考試真題:

1. Which is true about the web container request processing model?

A) If the init method on a filter throws an UnavailableException, then the container will make no further attempt to execute it.
B) The init method on a filter is called the first time a servlet mapped to that filter is invoked.
C) Filters associated with a named servlet are applied in the order they appear in the web application deployment descriptor file.
D) A filter defined for a servlet must always forward control to the next resource in the filter chain.

2. After a merger with another small business, your company has inherited a legacy WAR file but the original source files were lost. After reading the documentation of that web
application, you discover that the WAR file contains a useful tag library that you want to reuse in your own webapp packaged as a WAR file.
What do you need to do to reuse this tag library?

A) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the whole thing as a JAR file, and place that JAR file in your webapp's library directory.
B) Simply rename the legacy WAR file as a JAR file and place it in your webapp's library directory.
C) Unpack the legacy WAR file, move the TLD file to the META-INF directory, repackage the whole thing as a JAR file, and place that JAR file in your webapp's library directory.
D) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the WAR, and place that WAR file in your webapp's WEB-INF directory.

3. Given a web application in which the cookie userName is expected to contain the name of the user. Which EL expression evaluates to that user name?

A) ${cookie.userName}
B) ${userName}
C) ${cookie.user.name}
D) ${cookies.get('userName')}
E) ${cookies.userName[0]}
F) ${cookies.userName}[1]

4. You are creating a library of custom tags that mimic the HTML form tags. When the user submits a form that fails validation, the JSP form is forwarded back to the user. The <t:textField> tag must support the ability to re-populate the form field with the request parameters from the user's last request. For example, if the user entered "Samantha" in the text field called firstName, then the form is re-populated like this:
<input type='text' name='firstName' value='Samantha' />
Which tag handler method will accomplish this goal?

A) public void doTag() throws JspException {
ServletRequet request = pageContext.getRequest();
String value = request.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";
B) public int doStartTag() throws JspException {
JspContext ctx = getJspContext();
String value = ctx.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
return SKIP_BODY;
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";
C) public int doStartTag() throws JspException {
ServletRequet request = pageContext.getRequest();
String value = request.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
return SKIP_BODY;
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";
D) public void doTag() throws JspException {
JspContext ctx = getJspContext();
String value = ctx.getParameter(this.name);
if ( value == null ) value = "";
JspWriter out = pageContext.getOut();
try {
out.write(String.format(INPUT, this.name, value));
} (Exception e) { throw new JspException(e); }
}
private static String INPUT
= "<input type='text' name='%s' value='%s' />";

5. Which security mechanism uses the concept of a realm?

A) confidentiality
B) authentication
C) data integrity
D) authorization

問題與答案：

問題 #1 答案： C

問題 #2 答案： A

問題 #3 答案： A

問題 #4 答案： C

問題 #5 答案： B