Oracle WebLogic Server 12c: Administration I — Question 47

Identify two advantages of using a Single Client Access Name (SCAN) when configuring a GridLink data source. (Choose two.)

Answer options

• A. The Fast Connection Failover (FCF) pattern, which allows rapid failure detection, is enabled
• B. The more sophisticated runtime connection load balancing (RLCB) is used; without SCAN, load balancing reverts to a simple round-robin scheme
• C. SCAN is required for the GridLink data source to use an XA driver
• D. The database URL is shorter because it contains one SCAN alias and port as opposed to a host and port for each RAC node
• E. The data source configuration does not need to be updated when new nodes are added to the RAC cluster

Correct answer: A, E

Explanation

The correct answers A and E highlight benefits of SCAN: it enables Fast Connection Failover for quick failure detection and avoids the need to reconfigure the data source when new nodes are added. Option B is incorrect because, while RLCB is enhanced with SCAN, it does not negate the use of round-robin. Option C is also incorrect as SCAN is not a prerequisite for using XA drivers with GridLink. Option D, while true, is less significant compared to the operational advantages provided by A and E.