Correct Answer: D
The Logging Last Resource option:
Enables a non-XA JDBC connection to participate in distributed transactions using the Logging Last Resource (LLR) transaction optimization. Recommended in
place of Emulate Two-Phase Commit.
With this option, the transaction branch in which the connection is used is processed as the last resource in the transaction and is processed as a one-phase
commit operation. The result of the operation is written in a log file on the resource itself, and the result determines the success or failure of the prepare phase of
the transaction. This option offers some performance benefits with greater data safety than Emulate Two-Phase Commit.
Note: The transaction protocol for a JDBC data source determines how connections from the data source are handled during transaction processing. Transactions
within a JDBC data source are either global (XA) and non-global (local).
Incorrect answers:
E: Test Connections on Reserve is related to connections, not to transactions:
When Test Connections on Reserve is enabled, the server instance checks a database connection prior to returning the connection to a client. This helps reduce
the risk of passing invalid connections to clients.
Reference: OTN Home > Oracle WebLogic Server 10.3.1 Documentation > Administration Console Online Help > JDBC Data Source: Configuration: Transaction