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最新的 Java Technology 1Z0-858 免費考試真題:

1. Given:
3.public class MyTagHandler extends TagSupport {
4.public int doStartTag() {
5.// insert code here
6.// return an int
7.}
8.// more code here
...
18. }
There is a single attribute foo in the session scope.
Which three code fragments, inserted independently at line 5, return the value of the attribute? (Choose three.)

A) Object o = pageContext.getAttribute("foo");
B) Object o = pageContext.getAttribute("foo", PageContext.SESSION_SCOPE);
C) Object o = pageContext.findAttribute("foo");
D) HttpSession s = pageContext.getSession(); Object o = s.getAttribute("foo");
E) HttpServletRequest r = pageContext.getRequest(); Object o = r.getAttribute("foo");

2. Given that a web application consists of two HttpServlet classes, ServletA and ServletB, and the ServletA.service method:
20.
String key = "com.example.data";
21.
session.setAttribute(key, "Hello");
22.
Object value = session.getAttribute(key);
23.
Assume session is an HttpSession, and is not referenced anywhere else in ServletA.
Which two changes, taken together, ensure that value is equal to "Hello" on line 23? (Choose two.)

A) enclose lines 21-22 in a synchronized block:
synchronized(session) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}
B) ensure that ServletB synchronizes on the session object when setting session attributes
C) ensure that the ServletB.service method is synchronized
D) ensure that the ServletA.service method is synchronized
E) enclose lines 21-22 in a synchronized block:
synchronized(this) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}

3. Which activity supports the data integrity requirements of an application?

A) using HTTPS as a protocol
B) using HTTP Basic authentication
C) using forms-based authentication
D) using an LDAP security realm

4. Click the Exhibit button.
A servlet sets a session-scoped attribute product with an instance of com.example.Product and forwards to a JSP.
Which two output the name of the product in the response? (Choose two.)

A) <jsp:useBean id="com.example.Product" /> <%= product.getName() %>
B) <jsp:useBean id="product" type="com.example.Product">
<%= product.getName() %>
</jsp:useBean>
C) ${product.name}
D) <jsp:getProperty name="product" class="com.example.Product" property="name" />
E) <jsp:getProperty name="product" property="name" />

5. You are creating a JSP page to display a collection of data. This data can be displayed in several different ways so the architect on your project decided to create a generic servlet that generates a comma-delimited string so that various pages can render the data in different ways. This servlet takes on request parameter: objectID. Assume that this servlet is mapped to the URL pattern: /WEB-INF/data.
In the JSP you are creating, you need to split this string into its elements separated by commas and generate an HTML <ul> list from the data.
Which JSTL code snippet will accomplish this goal?

A) <c:import varReader='dataString' url='/WEB-INF/data'>
<c:param name='objectID' value='${currentOID}' />
</c:import>
<ul>
<c:forTokens items'${dataString.split(",")}' var='item'>
<li>${item}</li>
</c:forTokens>
</ul>
B) <c:import varReader='dataString' url='/WEB-INF/data'>
<c:param name='objectID' value='${currentOID}' />
</c:import>
<ul>
<c:forTokens items'${dataString}' delims=',' var='item'>
<li>${item}</li>
</c:forTokens>
</ul>
C) <c:import var='dataString' url='/WEB-INF/data'>
<c:param name='objectID' value='${currentOID}' />
</c:import>
<ul>
<c:forTokens items'${dataString.split(",")}' var='item'>
<li>${item}</li>
</c:forTokens>
</ul>
D) <c:import var='dataString' url='/WEB-INF/data'>
<c:param name='objectID' value='${currentOID}' />
</c:import>
<ul>
<c:forTokens items'${dataString}' delims=',' var='item'>
<li>${item}</li>
</c:forTokens>
</ul>

問題與答案：