1z0-900: Java EE 7 Application Developer - Free download from Exam Files

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?

Create two @onMessage methods in the same endpoint with appropriate parameter types.
Define the @onMessage methods in your endpoint with Object as parameter and check the actual type in your code.
You can achieve this only by creating separate WebSocket endpoints for each message type.
Create two @onMessage methods, each with appropriate decoder attribute in the same endpoint.

Correct answer: A

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

the Runnable Interface
the ManagedExecutorTask interface
the TaskEventListener interface
the ManagedTaskListener interface

Correct answer: D

Explanation:

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

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

MDBs can participate in transactions.
MDBs are invoked synchronously.
Each MDBs can process messages only from a single client.
MDBs retain data caches between client calls.

Correct answer: A

Explanation:

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

You have been asked to implement internationalization in your JSF web application.

Where do you configure the supported locales?

in the <f:view> tag of the Facelet page
in the web.xml file
in the faces-config.xml file
in the src folder

Correct answer: C

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?

@Observes(notifyObserver=IF_EXISTS) on line 3 and line 6
@Observes(during=IN_PROGRESS) on line 1
@Observes(during=AFTER_COMPLETION) on line 1
@Observes(notifyObserver=IF_EXISTS) on line 4 and line 7 before method parameter declaration

Correct answer: A

Explanation:

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

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

<%= exception.message %>
<c:out value=”${requestScope[‘javax.servlet.error.exception’]}”/>
<% exception.getMessage(); %>
<% System.out.println(e.getMessage()) %>

Correct answer: D

Explanation:

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

Given the code fragment:

And

Which two steps, when performed independently, enable the index.xhtml page to print the following text: The Id is 12345? (Choose two.)

Replace line 2 with: @Inject public void setAcc(Account acc)
Replace line 3 with: @Inject public Account getAcc()
Replace line 1 with: @Inject private Account acc;
Replace line 3 with: public @Inject Account getAcc()
Replace line 1 with: private @Inject Account acc;
Replace line 2 with: public void setAcc(@Inject Account acc)

Correct answer: DF

Given:

How often does the submitted task run?

need more details to determine
once
as many times as you like
based on a schedule

Correct answer: A

Given:

What code needs to be added to line 1 for MyMapper bean instances to be correctly passivated?

@Stateless @PassivationCapable
@Stateless
@Stateful @PassivationCapable
@Stateful

Correct answer: D

Explanation:

Reference: https://docs.oracle.com/javaee/6/tutorial/doc/giplj.html#gipln

Which URL represents an invalid approach to pass a parameter to a REST resource?

<base-url>/Employees?value=1
<base-url>/Employees&value=1
<base-url>/Employees/1
<base-url>/Employees;value=1

Correct answer: D

Vendor:	Oracle
Exam Code:	1z0-900
Exam Name:	Java EE 7 Application Developer
Date:	Jun 02, 2020
File Size:	2 MB

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