Oracle 1Z0-899 Online Practice Questions and Exam Preparation

Oracle 1Z0-899 Online Questions & Answers

• Question 91:

  Given the JavaBean class:

  public class MyBean {

  private Boolean roasted = false;

  public MyBean () {}

  public Boolean isRoasted () { returned roasted }

  public void setRoasted (Boolean roasted) { this.roasted = roasted; ] }

  Assume a controller has created an instance of this bean, called setRoasted (true), and inserted the bean into the application scope using the name "myBean".

  A JSP contains these two tags:

  Which is true?

  A. the page will include the output false
  B. the page will include the output
  C. the page will report that the property roasted does not exist
  D. the page will report that the syntax of the useBean tag is incorrect
  E. the page will report that the syntax of the getProperty tag ls incorrect
  E. the page will report that the syntax of the getProperty tag ls incorrect

  ---

  Reference: http://www.emacao.gov.mo/documents/18/06/exam.pdf (4th table from the top)

• Question 92:

  You are building a web application with a scheduling component. On the JSP, you need to show the current date, the date of the previous week, and the date of the next week.

  To help you present this information, you have created the following EL functions in the `d' namespace:

  ?Name : curData; signature: java.util.utilDate CurrentDate() ?Name : curData; signature: java.util.utilDate addweek (java.util.Date, int)

  ?Name: dateString; signature: java.util.String getDataString (jave.util.Data)

  Which EL code snippet will generate the string for the previous week?

  A. ${d:dateString(affWeek(curDate(), -1)) }
  B. ${d:dateString [addWeek[curDate[], - ]] }
  C. ${d:dateString [d:addWeek[d:curDate[], - 1]] }
  D. ${d:dateString (d:addWeek(d:curDate(), -1)) }
  D. ${d:dateString (d:addWeek(d:curDate(), -1)) }

• Question 93:

  A servlet class is injected with a JDBC data source. After injection has occurred, the servlet needs to create a cache out of some of the data in the database, so as to improve responsiveness. Which two methods can host the cache creation code? (Choose two)

  A. Servlet.init()
  B. Servlet.destroy()
  C. A method annotated with @Init
  D. A method annotated with @PostConstruct
  E. A method annotated with @PreDestroy
  F. A method annotated with @Resource
  A. Servlet.init()
  D. A method annotated with @PostConstruct

  ---

  A: Because the Servlet init() method is invoked when the servlet instance is loaded, it is the perfect location to carry out expensive operations that need only be performed during initialization. By definition, the init() method is thread-safe. The

  results of operations in the HttpServlet.init() method can be cached safely in servlet instance variables, which become read- only in the servlet service method.

  D: Example:

  @PostConstruct

  private void init() {

  cached = (Cached) ctx.lookup(EJB_PATH + Cached.class.getSimpleName());

• Question 94:

  Given:

  11.

  <%

  12.

  request.setAttribute ("vals", new String[] {"1", "2", "3", "4"});

  13.

  request.setAttribute ("index", "2");

  14.

  %>

  15.

  <% - - insert code here - - %>

  Which three EL expressions, inserted at line 15, are valid and evaluate to "3"? (Choose three)

  A. ${vals.2}
  B. ${vals ["2"] }
  C. ${vals.index}
  D. ${vals[index] }
  E. ${vals} [index]
  F. ${vals. (vals.index) }
  G. ${vals [vals[index-1]] }
  B. ${vals ["2"] }
  D. ${vals[index] }
  G. ${vals [vals[index-1]] }

• Question 95:

  As a convenience feature, your web pages include an Ajax request every five minutes to a special servlet that monitors the age of the user's session. The client-side JavaScript that handles the Ajax callback displays a message on the screen as the session ages. The Ajax call does NOT pass any cookies, but it passes the session ID in a request parameter called sessionID. In addition, assume that your webapp keeps a hasmap of session objects by the ID. Here is a partial implementation of this servlet:

  10.

  public class SessionAgeServlet extends HttpServlet {

  11.

  public void service(HttpServletRequest request, HttpServletResponse) throws IOException {

  12.

  String sessionID = request.getParameter("sessionID");

  13.

  HttpSession session = getSession(sessionID);

  14.

  long age = // your code here

  15.

  response.getWriter().print(age);

  16.

  }

  ... // more code here

  47. }

  Which code snippet on line 14, will determine the age of the session?

  A. session.getMaxInactiveInterval();
  B. session.getLastAccessed().getTime() session.getCreationTime().getTime();
  C. session.getLastAccessedTime().getTime() session.getCreationTime().getTime();
  D. session.getLastAccessed() - session.getCreationTime();
  E. session.getMaxInactiveInterval() session.getCreationTime();
  F. session.getLastAccessedTime() session.getCreationTime();
  F. session.getLastAccessedTime() session.getCreationTime();

• Question 96:

  View the exhibit.

  

  Assume the tag library in the exhibit is placed in a web application in the path /WEB- INF/tld/example.tld.

  1.

  2.

  Which JSP code, inserted at line 1, completes the JSP code to invoke the hello tag?

  D

• Question 97:

  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
  D. HttpServletResponse.encodeRedirectURL

• Question 98:

  ServletContextListeners are invoked in

  A. Random order
  B. contextInitialized and contextDestroyed are invoked in the order in which they are declared in the web.xml
  C. contextInitialized method are invoked in the order in which they are declared in the web.xml and the contextDestroyed method is invoked in the reverse order in which they are declared in the web.xml
  D. contextInitialized and contextDestroyed are invoked in the reverse order of which they are declared in the web.xml
  C. contextInitialized method are invoked in the order in which they are declared in the web.xml and the contextDestroyed method is invoked in the reverse order in which they are declared in the web.xml

  ---

  public interface ServletContextListener extends java.util.EventListener Interface for receiving notification events about ServletContext lifecycle changes.

  In order to receive these notification events, the implementation class must be either declared in the deployment descriptor of the web application, annotated with WebListener, or registered via one of the addListener methods defined on ServletContext.

  Implementations of this interface are invoked at their contextInitialized(javax.servlet.ServletContextEvent) method in the order in which they have been declared, and at their contextDestroyed (javax.servlet.ServletContextEvent) method in reverse order.

• Question 99:

  The jquery_1_3_2.jar file contains the JQuery Ajax framework in its META-INF/ resources directory. Where should the jar file be placed inside the web application to ensure the resources it contains are accessible by clients?

  A. WEB-INF/classes
  B. WEB-INF/jar
  C. WEB-INF/lib
  D. WEB INF/resources
  C. WEB-INF/lib

  ---

  Reference:

  http://www.ibm.com/developerworks/websphere/library/techarticles/0112_deboer/deboer.html (topic: web modules, third paragraph)

• Question 100:

  Given an HttpServletRequest request and an httpServletResponse response:

  41.

  HttpSession session = null;

  42.

  / / insert code here

  43.

  if (session = = null) {

  44.

  / / do something if session does not exist

  45.

  } else {

  46.

  / / do something if session exists

  47.

  }

  To implement the design intent, which statement must be inserted at line 42?

  A. session = response.getSession ();
  B. session = request.getSession ();
  C. session = request.getSession (true);
  D. session = request.getSession (false);
  E. session = request.getSession ("jsessionid");
  D. session = request.getSession (false);