Oracle Oracle Certifications 1Z0-900 Questions & Answers

• Question 91:

  Given the following code:

  

  What should you do at line 1 to enable this servlet receive request data without blocking?

  A. Use a Runnable instance with the start () method of AsyncContext.

  B. Define a ReadListener and assign it to the request input stream.

  C. Create a Callable class and delegate this operation to a ManagedExecutorService by using the dispatch method of AsyncContext.

  D. Define an AsyncListener and assign it to the AsyncContext object.

  Correct Answer: D

• Question 92:

  Which two elements CANNOT be injected by using an @Inject annotation? (Choose two.)

  A. static fields

  B. instance fields declared final

  C. concrete methods

  D. abstract methods

  Correct Answer: BD

  Reference: https://docs.oracle.com/javaee/6/api/javax/inject/Inject.html

• Question 93:

  Which code snippet indicates that the page you are designing is capable of handling errors?

  A. <%@page errorPage="errorHandler.jsp"%>

  B. <%= requestScope[`javax.servlet.error'] !=null %>

  C. <%@page isErrorPage="true"%>

  D.

  Correct Answer: C

• Question 94:

  Which of these can be a JPA entity?

  A. Enum type

  B. Abstract class

  C. Interface type

  D. Final class

  Correct Answer: A

• Question 95:

  You created two filters for your web application by using the @WebFilter annotation, one for authorization and the other for narrowing results by the provided search criteria. The authorization filter must be invoked first.

  How can you specify this?

  A. setting the priority attribute of the @WebFilter annotation for each of the filters

  B. placing the filter mapping elements in the required order in the web.xml deployment descriptor

  C. placing @WebFilterMapping annotations in the required order

  D. specifying the filter precedence order by using the @Priority annotation

  Correct Answer: A

• Question 96:

  You have been assigned to the Widget Editor portion of an application. It contains a Widget Editor Facelet page, the Widget class, and a simple WidgetEditor backing bean, which contains a reference to the current Widget instance.

  Given the code fragment from the Widget class:

  

  Given the code fragment from the Facelet page:

  

  The page displays Conversion Error when a user fills out all the form fields and clicks the Save button.

  Which step do you perform to fix this problem?

  A. Replace Line 1 with:

  value="#{widgetEditor.widget.createdDate}"

  converter="java.util.Date"/>

  B. Enclose the code fragment within the tag

  C. Insert at Line 1

  D. Replace Line 1 with:

  Correct Answer: D

• Question 97:

  Which two features are provided by the JSTL Core library for a JSP? (Choose two.)

  A. iteration over a collection

  B. buffering of large result sets

  C. testing conditions

  D. message localization

  Correct Answer: AD

  Reference: https://www.journaldev.com/2090/jstl-tutorial-jstl-tags-example

• Question 98:

  Given the set of navigation rules:

  

  Which two define a valid flow of view IDs through the application? (Choose two.)

  A. home > goodbye > list-widgets

  B. dashboard > home > add-widget > list-widgets

  C. list-widgets > add-widget > home > dashboard > home

  D. home > list-widgets > add-widget > goodbye

  Correct Answer: CD

• Question 99:

  How can a servlet indicate to the browser that cookie data should be sent over a secure connection?

  A. Call the getSecure(true) method on the cookie object.

  B. Encrypt the cookie data. The browser automatically sends encrypted data over a secure connection.

  C. Set the ENCRYPT header in the response.

  D. Configure SessionTrackingMode.SSL on the ServletContext object.

  Correct Answer: A

  Reference: https://docs.oracle.com/javaee/6/api/?javax/servlet/http/Cookie.html

• Question 100:

  Given a JSL document describing a batch job:

  

  How do you initiate a batch job?

  A. Get the JobExecution object from BatchRuntime and call its start() method.

  B. Get the JobExecution object from BatchRuntime and set its status to JobStatus.INITIATED.

  C. Get the JobOperator object from BatchRuntime and call its start() method.

  D. Call BatchRunTime.initialize("ProductLoadJob");

  Correct Answer: A