You are responsible for installing and setting up WebLogic Server to support the development, testing, and production of an application. Each phase of the application's life cycle has different scalability, performance, and security requirements. How will you implement this?

Examine the partial server log entry shown below:
#### <May 19,2013 8:28:01 PM EDT > <warning> <JDBC > <host01> <managed1>
<<WLS kernel >> < > < > < 1369013281005 > <BEA-001129> <Received exception while creating connection for pool -oracleDS1-> Which two statements are true?

Which three statements about patching Web Logic server (WLS) by using Opatch are true?

GridLink data sources are designed for use with an Oracle RAC database. By using the Fast Connection Failover (FCF) pattern, GridLink data sources can quickly react when a RAC node goes down.
Which two statements are true?

The development group supplied you with the latest WAR file for the company web application. It has been thoroughly tested and needs to be placed into production. In the production file system, you copy over the previous WAR file with the new version. You log into the administration console and redeploy the application.
Current uses continue to access the older version of the application, while new users are taken to the new version. Explain this scenario.