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: D

Explanation:

Reference: https://abhirockzz.gitbooks.io/java-websocket-api-handbook/content/Receiving%20Messages.html

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

Given the code fragment:

Which URL triggers the invocation of the getEmployee () method?

<base url>/Employees/89724
<base url>/Employees/J6349
<base url>/Employees/id:a7280
<base url>/Employees/id/J6349

Correct answer: B

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: A

Java EE’s support for WS-Security includes handling which two types of security credentials? (Choose two.)

X.509 certificates
SAML tokens
OAuth Bearer tokens
Two-factor authentication tokens

Correct answer: AB

Given the code fragment:

Which method should be used on line 3 to enable default validation mechanism?

u.setProperty(String, Object)
u.setProperty(Schema)
u.setEventHandler(ValidationEventHandler)
u.setAdapter(XmlAdapter)

Correct answer: D

Explanation:

Reference: https://docs.oracle.com/javaee/6/api/javax/xml/bind/Unmarshaller.html

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

Given the code fragments:

What code should you add to the body of the updateEmployee method in order to save pending changes to the database?

entityManager.merge(emp);
Context. Ctx = new InitialContext();
UserTransaction utx = (UserTransaction)ctx.lookup(“java:comp/UserTransaction”);
utx.begin();
entityManager.merge(emp);
utx.commit();
entityManager.lock(emp);
EntityManager.merge(emp);
entityManager.getTransaction().begin();
entityManager.merge(emp);
entityManager.getTransaction().commit();

Correct answer: B

Vendor:	Oracle
Exam Code:	1z0-900
Exam Name:	Java EE 7 Application Developer
Date:	May 30, 2019
File Size:	1 MB

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