1Z0-858 Online Practice Questions and Answers

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. Here is an example use of this tag and its output:

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. public class MessageTag extends SimpleTagSupportimplements VariableAttributes {private Map attributes = new HashMap();public void setVariableAttribute(String uri,String name, Object value) {this.attributes.put(name, value);}// more tag handler methods}

B. The Simple tag model does NOT support a variable number of attributes.

C. public class MessageTag extends SimpleTagSupportimplements DynamicAttributes {private Map attributes = new HashMap();public void putAttribute(String name, Object value) {this.attributes.put (name, value);}// more tag handler methods}

D. public class MessageTag extends SimpleTagSupportimplements VariableAttributes {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 SimpleTagSupportimplements DynamicAttributes {private Map attributes = new HashMap();public void setDynamicAttribute(String uri, String name,Object value) {this.attributes.put(name, value);}// more tag handler methods}

Your web site has many user-customizable features, for example font and color preferences on web pages. Your IT department has already built a subsystem for user preferences using the Java SE platform's lang.util.prefs package APIs, and you have been ordered to reuse this subsystem in your web application. You need to create an event listener that constructs the preferences factory and stores it in the application scope for later use. Furthermore, this factory requires that the URL to a database must be declared in the deployment descriptor like this:

42.

43.

prefsDbURL

44.

45.

jdbc:pointbase:server://dbhost:4747/prefsDB

46.

47.

Which partial listener class will accomplish this goal?

A. public class PrefsFactoryInitializer implements ContextListener {public void contextInitialized (ServletContextEvent e) {ServletContext ctx = e.getContext();String prefsURL = ctx.getParameter ("prefsDbURL");PreferencesFactory myFactory = makeFactory(prefsURL);ctx.putAttribute ("myPrefsFactory", myFactory);}// more code here}

B. public class PrefsFactoryInitializer implements ServletContextListener {public void contextCreated (ServletContext ctx) {String prefsURL = ctx.getInitParameter("prefsDbURL");PreferencesFactory myFactory = makeFactory (prefsURL);ctx.setAttribute("myPrefsFactory", myFactory);}// more code here}

C. public class PrefsFactoryInitializer implements ServletContextListener {public void contextInitialized (ServletContextEvent e) {ServletContext ctx = e.getServletContext();String prefsURL = ctx.getInitParameter ("prefsDbURL");PreferencesFactory myFactory = makeFactory (prefsURL);ctx.setAttribute("myPrefsFactory", myFactory);}// more code here}

D. public class PrefsFactoryInitializer implements ContextListener {public void contextCreated (ServletContext ctx) {String prefsURL = ctx.getParameter("prefsDbURL");PreferencesFactory myFactory = makeFactory (prefsURL);ctx.putAttribute("myPrefsFactory", myFactory);}// more code here}

Which three are true about the HttpServletRequestWrapper class? (Choose three.)

A. The HttpServletRequestWrapper is an example of the Decorator pattern.

B. The HttpServletRequestWrapper can be used to extend the functionality of a servlet request.

C. A subclass of HttpServletRequestWrapper CANNOT modify the behavior of the getReader method.

D. An HttpServletRequestWrapper may be used only by a class implementing the javax.servlet.Filter interface.

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.

Which method must be used to encode a URL passed as an argument to HttpServletResponse.sendRedirect when using URL rewriting for session tracking?

A. ServletResponse.encodeURL

B. HttpServletResponse.encodeURL

C. ServletResponse.encodeRedirectURL

D. HttpServletResponse.encodeRedirectURL

Your web application views all have the same header, which includes the