1Z0-900 Questions | Free Practice 1Z0-900 Dumps & Exam Prep

Question No 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?

Choose the Choices:

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.

Question No 2

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

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protecting data from unauthorized viewing by using encryption

verifying that a user is allowed to perform an action

ensuring that data is not modified in transit

verifying identity claims from users

Question No 3

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

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Question No 4

Given the code fragment: Which URL triggers the invocation of the getEmployee () method?

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Question No 5

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

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

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