0B0-108 Free Dumps Study Materials
Question 9: Scenario : You have made the decision to migrate all your operations onto WebLogic Server. An
application has been chosen from each department for the initial phase of migration one from each of
Sales, Marketing, Accounts, and Customer Service. The applications will be deployed as individual EAR
files to a cluster of WebLogic Server 9.x instances, each with a pool of connections to an Oracle 10g
database that provides corporate and departmental data services. The database team hopes to
upgrade the database to use Oracle RAC (Real Application Clusters) shortly, which will require you to
configure multiple sets of connections. Connectivity to the existing Service Engineer Dispatch system is
via a JMS message bridge. When a service engineer calls in with a report, a message is sent via JMS to
the Customer Service application deployed in WebLogic Server. The customer record in the Customer
Service database must be updated with details from the message. It is important that the message is
not lost because the call management system is not able to resend messages. To address this, the
Customer Service application is accessing a persistent JMS Queue using an XA compatible connection
factory.
The database team informs you that they have now implemented Oracle Real Application Clusters (RA for
the Customer Service database, and applications should connect to a second database node if the
primary node is unavailable. You set up a Multi Data Source in Failover mode, which is configured to
use two Data Sources PrimaryDS and SecondaryDS, each connecting to one Oracle RAC node.
WebLogic Server will fail over to SecondaryDS if a connection test to PrimaryDS fails. Under what other
condition will this happen by default (that is, with no additional options checke)?
A. If a connection to PrimaryDS is not released within Statement Timeout seconds.
B. If all the connections to PrimaryDS are in use.
C. If the administrator has suspended the PrimaryDS Data Source.
D. Failover will only occur if a connection test fails for a PrimaryDS connection.
Correct Answer: C