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Correct Answer: A

JMS queue

A staging area that contains messages that have been sent and are waiting to be read. Note that, contrary

to what the name queue suggests, messages don't have to be delivered in the order sent. A JMS queue

only guarantees that each message is processed only once.

Incorrect:

Not B: (Only one queue required)

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A distributed destination is a set of destinations (queues or topics) that are accessible as a single, logical

destination to a client. A distributed destination has the following characteristics:

It is referenced by its own JNDI name.

Members of the set are usually distributed across multiple servers within a cluster, with each destination member belonging to a separate JMS server.

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A distributed queue is a set of physical JMS queue members. As such, a distributed queue can be used to create a QueueSender, QueueReceiver, and a QueueBrowser. The fact that a distributed queue represents multiple physical queues is mostly transparent to your application.

Not Topic:

JMS topic

A distribution mechanism for publishing messages that are delivered to multiple subscribers.

Correct Answer: B

Incorrect: Not A: New or enhanced WebLogic 12c features include JAVA EE 6 support all kinds of JEE6 specifications Not C: 12c do include a new Maven plug-in Not D: For 1.6 adapters, you can embed metadata annotations in the resource adapter class files to specify deployment information, eliminating the need to create the ra.xml file manually.

Correct Answer: C

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When you create a data source using the Administration Console, the Administration Console automatically sets the Test Table Name attribute for a data source based on the DBMS that you select. The Test Table Name attribute is used in connection testing which is optionally performed periodically or when you create or reserve a connection, depending on how you configure the testing options. For database tests to succeed, the database user used to create database connections in the data source must have access to the database table. If not, you should either grant access to the user (make this change in the DBMS) or change the Test Table Name attribute to the name of a table to which the user does have access (make this change in the WebLogic Server Administration Console).

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To manually test a connection from a data source, you can use the Test Data Source feature on the JDBC Data Source: Monitoring: Testing page in the Administration Console (see " Test JDBC data sources") or the testPool() method in the JDBCDataSourceRuntimMBean. To test a database connection from a data source, Test Reserved Connections must be enabled and Test Table Name must be defined in the data source configuration. Both are defined by default if you create the data source using the Administration Console.

When you test a data source, WebLogic Server reserves a connection, tests it using the query defined in Test Table Name, and then releases the connection.

Reference: Configuring and Managing JDBC Data Sources for Oracle WebLogic Server, Tuning Data Source Connection Pools