Oracle Oracle Certifications 1Z0-900 Questions & Answers

• Question 121:

  Which class do you use to handle an incoming JSON Message as a stream?

  A. JsonReader

  B. JsonObjectBuilder

  C. JsonParser

  D. JsonObject

  Correct Answer: A

  Reference: https://docs.oracle.com/javaee/7/tutorial/jsonp002.htm

• Question 122:

  Which two approaches would result in the current date being added to the output of a JSP? (Choose two.)

  A. <%= out.printIn(new java.util.Date()) %>

  B. <% out.printIn(new java.util.Date()); %>

  C. <%= new java.util.Date() %>

  D. <% System.out.printIn(new java.util.Date()); %>

  Correct Answer: AC

  Reference: http://www.ntu.edu.sg/home/ehchua/programming/java/javaserverpages.html

• Question 123:

  When handling a JSF request, your application code decided to redirect the call to another URL by using HTTP redirect. Which action should you take to correctly complete the handling of the JSF life cycle?

  A. Set the immediate="true" attribute on the command button that was used to perform this call.

  B. Invoke the dispatch() method on the ExternalContext object.

  C. Invoke the setCurrentPhaseId(RENDER_RESPONSE) method on the FacesContext object.

  D. Invoke the responseComplete() method on the FacesContext object.

  Correct Answer: C

• Question 124:

  Given the code fragment:

  

  When the context root is requested http://host:port/context, how does the container resolve this mapping?

  A. thirdServlet handles the request.

  B. firstServlet handles the request.

  C. The container throws an error at startup.

  D. secondServlet handles the request.

  Correct Answer: C

• Question 125:

  Which interface should you implement if you want to be alerted to the lifecycle events surrounding your task being executed by a ManagedExecutorService?

  A. the Runnable Interface

  B. the ManagedExecutorTask interface

  C. the TaskEventListener interface

  D. the ManagedTaskListener interface

  Correct Answer: D

  Reference: https://github.com/javaee/concurrency-ee-spec/blob/master/api/src/main/java/javax/enterprise/ concurrent/ManagedExecutorService.java

• Question 126:

  Given the code fragment: Which URL triggers the invocation of the getEmployee () method?

  

  A. /Employees/89724

  B. /Employees/J6349

  C. /Employees/id:a7280

  D. /Employees/id/J6349

  Correct Answer: B

• Question 127:

  What is true about Message-Driven Beans (MDBs)?

  A. MDBs can participate in transactions.

  B. MDBs are invoked synchronously.

  C. Each MDBs can process messages only from a single client.

  D. MDBs retain data caches between client calls.

  Correct Answer: A

  Reference: https://docs.oracle.com/javaee/7/tutorial/ejb-intro003.htm

• Question 128:

  You have been asked to implement internationalization in your JSF web application. Where do you configure the supported locales?

  A. in the tag of the Facelet page

  B. in the web.xml file

  C. in the faces-config.xml file

  D. in the src folder

  Correct Answer: A

• Question 129:

  Given the code fragment: Which code can be added to register both of these methods to receive BankEvent notifications only if an instance of BankActivityService is already instantiated in the current context?

  

  A. @Observes(notifyObserver=IF_EXISTS) on line 3 and line 6

  B. @Observes(during=IN_PROGRESS) on line 1

  C. @Observes(during=AFTER_COMPLETION) on line 1

  D. @Observes(notifyObserver=IF_EXISTS) on line 4 and line 7 before method parameter declaration

  Correct Answer: A

  Reference https://docs.oracle.com/javaee/7/tutorial/cdi-adv005.htm

• Question 130:

  Which code snippet prints the exception error message as part of the page output?

  A. <%= exception.message %>

  B.

  C. <% exception.getMessage(); %>

  D. <% System.out.println(e.getMessage()) %>

  Correct Answer: D

  Reference: https://www.geeksforgeeks.org/3-different-ways-print-exception-messages-java/