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Question 4 : A customer has a critical, performance-sensitive web application that connects to a multimode Oracle RAC database. Which feature of WebLogic can provide signification benefit?

A. The Web Session Affinity feature of Active GridLink for RAC.

B. WebLogic Clustering

C. The Transaction Affinity feature of Active GridLink for RAC

D. Coherence*Web Session Replication

Answer: C

Explanation: Active GridLink for Oracle RAC In Oracle WebLogic Server 10.3.4, a single data source implementation has been introduced to support an Oracle RAC cluster. It responds to FAN events to provide Fast Connection Failover (FCF), Runtime Connection Load-Balancing (RCLB), and RAC instance graceful shutdown. XA affinity is supported at the global transaction Id level. The new feature is called WebLogic Active GridLink for RAC; which is implemented as the GridLink data source within WebLogic Server.

Note:

* The WebLogic Server JDBC subsystem has supported Oracle RAC since WLS version 9.0, originally developed for Oracle9i RAC. This support is based on a particular type of data source configuration, called a multi data source. A multi data source is a data source abstraction over one or more individual data sources. It serves JDBC connections from each of the member data sources according to a specified policy. A RAC multi data source configuration requires that each member data source obtain connections to a particular RAC instance.

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