Oracle Oracle Certifications 1Z0-858 Questions & Answers

• Question 41:

  A web application uses the HttpSession mechanism to determine if a user is "logged in." When a user supplies a valid user name and password, an HttpSession is created for that user.

  The user has access to the application for only 15 minutes after logging in. The code must determine how long the user has been logged in, and if this time is greater than 15 minutes, must destroy the HttpSession. Which method in HttpSession is used to accomplish this?

  A. getCreationTime

  B. invalidateAfter

  C. getLastAccessedTime

  D. getMaxInactiveInterval

  Correct Answer: A

• Question 42:

  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

  Correct Answer: D

• Question 43:

  Which interface must a session attribute implement if it needs to be notified when a web container persists a session?

  A. javax.servlet.http.HttpSessionListener

  B. javax.servlet.http.HttpSessionBindingListener

  C. javax.servlet.http.HttpSessionAttributeListener

  D. javax.servlet.http.HttpSessionActivationListener

  Correct Answer: D

• Question 44:

  What is the purpose of session management?

  A. To manage the user's login and logout activities.

  B. To store information on the client-side between HTTP requests.

  C. To store information on the server-side between HTTP requests.

  D. To tell the web container to keep the HTTP connection alive so it can make subsequent requests without the delay of making the TCP connection.

  Correct Answer: C

• Question 45:

  Which two are true concerning the objects available to developers creating tag files? (Choose two.)

  A. The session object must be declared explicitly.

  B. The request and response objects are available implicitly.

  C. The output stream is available through the implicit outStream object.

  D. The servlet context is available through the implicit servletContext object.

  E. The JspContext for the tag file is available through the implicit jspContext object.

  Correct Answer: BE

• Question 46:

  You web application uses a lot of Java enumerated types in the domain model of the application. Built into each enum type is a method, getDisplay(), which returns a localized, user-oriented string. There are many uses for presenting enums within the web application, so your manager has asked you to create a custom tag that iterates over the set of enum values and processes the body of the tag once for each value; setting the value into a page-scoped attribute called, enumValue. Here is an example of how this tag is used:

  10.

  11.

  12.

  ${enumValue.display}

  13.

  14.

  You have decided to use the Simple tag model to create this tag handler.

  Which tag handler method will accomplish this goal?

  A. public void doTag() throw JspException {try {for ( Enum value : getEnumValues() ) {pageContext.setAttribute("enumValue", value);getJspBody().invoke(getOut());}} (Exception e) { throw new JspException(e); }}

  B. public void doTag() throw JspException {try {for ( Enum value : getEnumValues() ) {getJspContext ().setAttribute("enumValue", value);getJspBody().invoke(null);}} (Exception e) { throw new JspException(e); }}

  C. public void doTag() throw JspException {try {for ( Enum value : getEnumValues() ) {getJspContext ().setAttribute("enumValue", value);getJspBody().invoke(getJspContext().getWriter());}} (Exception e) { throw new JspException (e); }}

  D. public void doTag() throw JspException {try {for ( Enum value : getEnumValues() ) {pageContext.setAttribute("enumValue", value);getJspBody().invoke(getJspContext().getWriter());}} (Exception e) { throw new JspException(e); }}

  Correct Answer: B

• Question 47:

  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.findAttribute("foo");

  C. Object o = pageContext.getAttribute("foo",PageContext.SESSION_SCOPE);

  D. HttpSession s = pageContext.getSession();Object o = s.getAttribute("foo");

  E. HttpServletRequest r = pageContext.getRequest();Object o = r.getAttribute("foo");

  Correct Answer: BCD

• Question 48:

  You are creating a content management system (CMS) with a web application front-end. The JSP that displays a given document in the CMS has the following general structure:

  1.

  <%-- tag declaration --%>

  2.

  ...

  11. ... ... ...

  99.

  The citation tag must store information in the document tag for the document tag to generate a reference section at the end of the generated web page.

  The document tag handler follows the Classic tag model and the citation tag handler follows the Simple tag model. Furthermore, the citation tag could also be embedded in other custom tags that could have either the Classic or Simple tag handler model.

  Which tag handler method allows the citation tag to access the document tag?

  A. public void doTag() {JspTag docTag = findAncestorWithClass(this, DocumentTag.class); ((DocumentTag)docTag).addCitation(this.docID);}

  B. public void doStartTag() {JspTag docTag = findAncestorWithClass(this, DocumentTag.class); ((DocumentTag)docTag).addCitation(this.docID);}

  C. public void doTag() {Tag docTag = findAncestor(this, DocumentTag.class); ((DocumentTag) docTag).addCitation(this.docID);}

  D. public void doStartTag() {Tag docTag = findAncestor(this, DocumentTag.class); ((DocumentTag) docTag).addCitation(this.docID);}

  Correct Answer: A

• Question 49:

  Given:

  6.

  7.

  <%="processing" %>

  8.

  and a custom tag handler for foo which extends TagSupport.

  Which two are true about the tag handler referenced by foo? (Choose two.)

  A. The doStartTag method is called once.

  B. The doAfterBody method is NOT called.

  C. The EVAL_PAGE constant is a valid return value for the doEndTag method.

  D. The SKIP_PAGE constant is a valid return value for the doStartTag method.

  E. The EVAL_BODY_BUFFERED constant is a valid return value for the doStartTag method.

  Correct Answer: AC

• Question 50:

  You have built your own light-weight templating mechanism. Your servlets, which handle each request, dispatch the request to one of a small set of template JSP pages. Each template JSP controls the layout of the view by inserting the header, body, and footer elements into specific locations within the template page. The URLs for these three elements are stored in request-scoped variables called, headerURL, bodyURL, and footerURL, respectively. These attribute names are never used for other purposes. Which JSP code snippet should be used in the template JSP to insert the JSP content for the body of the page?

  A.

  B.

  C.

  D.

  E.

  F.

  Correct Answer: C