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Exam Java EE 7 Application Developer
Number 1z0-900
File Name Java EE 7 Application Developer.test4prep.1z0-900.2019-05-30.1e.43q.vcex
Size 1.35 Mb
Posted May 30, 2019
Downloads 21



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Demo Questions

Question 1
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: Define the @onMessage methods in your endpoint with Object as parameter and check the actual type in your code.
  • C: You can achieve this only by creating separate WebSocket endpoints for each message type.
  • D: Create two @onMessage methods, each with appropriate decoder attribute in the same endpoint.



Question 2
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



Question 3
Given the code fragment:

  

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

  • A: <base url>/Employees/89724
  • B: <base url>/Employees/J6349
  • C: <base url>/Employees/id:a7280
  • D: <base url>/Employees/id/J6349



Question 4
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.



Question 5
You have been asked to implement internationalization in your JSF web application. 
Where do you configure the supported locales?

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



Question 6
Java EE’s support for WS-Security includes handling which two types of security credentials? (Choose two.)

  • A: X.509 certificates
  • B: SAML tokens
  • C: OAuth Bearer tokens
  • D: Two-factor authentication tokens



Question 7
Given the code fragment:

  

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

  • A: u.setProperty(String, Object)
  • B: u.setProperty(Schema)
  • C: u.setEventHandler(ValidationEventHandler)
  • D: u.setAdapter(XmlAdapter)



Question 8
Given:

  

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

  • A: @Stateless @PassivationCapable
  • B: @Stateless
  • C: @Stateful @PassivationCapable
  • D: @Stateful



Question 9
Which URL represents an invalid approach to pass a parameter to a REST resource?

  • A: <base-url>/Employees?value=1
  • B: <base-url>/Employees&value=1
  • C: <base-url>/Employees/1
  • D: <base-url>/Employees;value=1



Question 10
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? 

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









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