Oracle Oracle Database 1Z0-900 Questions & Answers

• Question 141:

  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.

  Correct Answer: D

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

• Question 142:

  Which two capabilities are provided by the Java Authentication and Authorization Services (JAAS) API? (Choose two.)

  A. protecting data from unauthorized viewing by using encryption

  B. verifying that a user is allowed to perform an action

  C. ensuring that data is not modified in transit

  D. verifying identity claims from users

  Correct Answer: BC

  Reference: https://docs.oracle.com/javase/8/docs/technotes/guides/security/jaas/JAASRefGuide.html