[Dec-2021] 1Z0-900 Exam Dumps Pass with Updated 2021 Java EE 7 Application Developer
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Oracle 1Z0-900 Exam Syllabus Topics:
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NEW QUESTION 18
Given the following code:
What should you do at line 1to enable this servlet receive request data without blocking?
- A. Define an AsyncListenerand assign it to the AsyncContext object.
- B. Create a Callable class and delegate this operation to a ManagedExecutorServiceby using the dispatch method of AsyncContext.
- C. Define a ReadListener and assign it to the request input stream.
- D. Use a Runnableinstance with the start ()method of AsyncContext.
Answer: A
Explanation:
Explanation
NEW QUESTION 19
A Persistence application locks entity xwith a LockModeType.PESSIMISTIC_READlock type. Which statement is true?
- A. This operation will force serialization among transactions attempting to read the entity data.
- B. LockModeType.PESSIMISTIC_READ is the synonym of LockModeType.READ
- C. If the application updates the entity later, and the changes are flushed to the database, the lock will be converted to an exclusive look.
- D. This operation will result in a TransactionRolledbackExceptionif the lock cannot be obtained.
Answer: A
Explanation:
Explanation/Reference: https://docs.oracle.com/javaee/7/api/javax/persistence/LockModeType.html
NEW QUESTION 20
Given the code fragment:
How can you apply DateConverterto the birthdayfield?
- A. by adding @Convert((DateConverter.class))at line 2
- B. by adding @Converter(autoApply=true)at line 1
- C. by adding @Convert(to=Date.class)at line 3
- D. by invoking the setConverter(DateConverter.class)method on the EntityManagerobject
Answer: C
NEW QUESTION 21
Given the JPQL code fragment:
Select pub.title, pub.author, pub.pages FROM Publisher pub
Which two clauses do you add to this JPQL query to retrieve only those books with between 500 and 750 total pages? (Choose two.)
- A. WHERE pub.pages <= 500 AND pub.pages >=750
- B. WHERE pub.pages <= 500 OR pub.pages >= 750
- C. WHERE MIN(pages) >= 500 AND MAX(pages) <= 750
- D. WHERE pub.pages BETWEEN 500 AND 750
Answer: B,C
Explanation:
Explanation
NEW QUESTION 22
You need to develop a chat application, which allows the display of emoticons and images together with text messages.
How should you configure a WebSocket endpoints to receive both text and binary messages?
- A. Create two @onMessage methods in the same endpoint with appropriate parameter types.
- B. You can achieve this only by creating separate WebSocket endpoints for each message type.
- C. Create two @onMessage methods, each with appropriate decoder attribute in the same endpoint.
- D. Define the @onMessage methods in your endpoint with Object as parameter and check the actual type in your code.
Answer: C
NEW QUESTION 23
Given the following code:
What should you do at line 1to enable this servlet receive request data without blocking?
- A. Define an AsyncListenerand assign it to the AsyncContext object.
- B. Create a Callable class and delegate this operation to a ManagedExecutorServiceby using the dispatch method of AsyncContext.
- C. Define a ReadListener and assign it to the request input stream.
- D. Use a Runnableinstance with the start ()method of AsyncContext.
Answer: A
NEW QUESTION 24
Given the JPQL code fragment:
Select pub.title, pub.author, pub.pages FROM Publisher pub
Which two clauses do you add to this JPQL query to retrieve only those books with between 500 and 750 total pages? (Choose two.)
- A. WHERE pub.pages <= 500 AND pub.pages >=750
- B. WHERE pub.pages <= 500 OR pub.pages >= 750
- C. WHERE MIN(pages) >= 500 AND MAX(pages) <= 750
- D. WHERE pub.pages BETWEEN 500 AND 750
Answer: B,C
NEW QUESTION 25
Given the following class definition with numbered lines:
How do you specify to use this mock CDI bean implementation instead of the regular implementation class?
- A. Start up the server with the optional -alternativecommand-line option, specifying any alternative class names in a comma-separated list.
- B. Use the alternativeselement in the beans.xmlfile and specify the class name in the classelement within it.
- C. Delete the regular implementation class from the WAR.
- D. Reorder the implementation names in the beans.xmlfile such that the desired alternative is listed earlier.
Answer: A
NEW QUESTION 26
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 4 and line 7 before method parameter declaration
- B. @Observes(during=AFTER_COMPLETION) on line 1
- C. @Observes(notifyObserver=IF_EXISTS) on line 3 and line 6
- D. @Observes(during=IN_PROGRESS) on line 1
Answer: C
Explanation:
Explanation
Reference https://docs.oracle.com/javaee/7/tutorial/cdi-adv005.htm
NEW QUESTION 27
Given:
Which annotation do you use on line 1 to ensure that clients immediately time out when attempting to concurrently invoke callMethod () while another client is already accessing the bean?
- A. @AccessTimeout (-1)
- B. @AccessTimeout (null)
- C. @AccessTimeout (value = 1, unit = TimeUnit.SECONDS)
- D. @AccessTimeout (0)
Answer: D
NEW QUESTION 28
Which two statements are true about the relationship between JavaServer Pages (JSP) and servlets?
(Choose two.)
- A. A JSP page has access to the same information, objects, and a context as a servlet.
- B. A JSP page is interpreted by JSPServlet.
- C. A JSP page must extend the HTTPServletclass to behave like a servlet.
- D. A JSP page must be written as either an XML file or a JSP file before it is turned into a servlet.
Answer: C,D
NEW QUESTION 29
Your organization is planning for a periodic counting of individual items automatically throughout the course of the year. As part of this activity, the user has loaded items to the cycle count but some of the items are not being considered when count schedules and count sequences are not generated.
Identify two reasons that explain why the items are not being considered.
- A. The ABC assignment group is not defined.
- B. The Cycle Count Enabled flag is not selected for the inventory organization.
- C. The Include in Schedule option is not selected to include the item for auto-scheduling.
- D. The Cycle Count Enabled flag is not selected for the item.
- E. The approval controls are not set up.
Answer: D,E
NEW QUESTION 30
Given an HttpServletRequest request and an EJB SessionContext ctx.
Which is a valid way to retrieve the Principal invoking either behavior?
- A. request.getCallerPrincipal() and ctx.getUserPrincipal()
- B. request.getUserPrincipal() and ctx.getUserPrincipal()
- C. request.getUserPrincipal() and ctx.getCallerPrincipal()
- D. request.getCallerPrincipal() and ctx.getCallerPrincipal()
Answer: D
NEW QUESTION 31
Given the code fragment from a Facelet page:
On Line 1, you ae asked to insert a search box that displays the text ''Search Here'' via a placeholder.
Assume searchMBis a valid Managed Bean.
Which two options enable you to create a search box with a placeholderattribute on Line 1? (Choose two.)
<h:inputText value=''#(searchMB.query)''>
- A. input>
- B. <f:param name=''placeholder'' value=''Search Here''/>
</h:inputText>
<h:inputText value=''#(searchMB.query)'' placeholder=''Search here''/> - C. <input jsf:id=''search'' placeholder=''Search here'' jsf:value=''#
- D. (searchMB.query)''></input>
<h:inputText pt:placeholder=''Search Here'' value=''#(searchMB.query)''/> - E. <input id=''search'' jsf:placeholder=''Search Here'' value=''$(searchMB.query)''></
Answer: A,D
NEW QUESTION 32
Which annotation allows a request to be executed with another Principal's identity?
- A. It is not possible to execute a request with another Principal's identity.
- B. @RolesAllowed
- C. @UseIdentity
- D. @Runs
Answer: B
NEW QUESTION 33
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