Oracle Database 12c: RAC and Grid Infrastructure Administration — Question 102

Your expertise is requested for these customer requirements:
1. The Data Guard environment must be in maximum protection mode.
2. Reports must be offloaded to a physical standby database.
3. There must be no lag between the primary and standby databases that affect the reports produced.
4. The primary database must be resilient in case of a single network failure.
Which solution is correct for these requirements?

Answer options

• A. two standby databases, at least one of them a physical standby with Real-Time Query enabled and the STANDBY_MAX_DELAY parameter set to zero, receiving redo from the primary with asynchronous transport
• B. two standby databases, at least one of them a physical standby with Real-Time Query enabled and the STANDBY_MAX_DATA_DELAY parameter set to zero, receiving redo from the primary with synchronous transport
• C. one physical standby database with Real-Time Query enabled, receiving redo from two Far Sync instances that are connected the primary
• D. one physical standby database with Real-Time Query enabled and the STANDBY_MAX_DATA_DELAY parameter set to zero, receiving redo from the primary with synchronous transport
• E. two physical standby databases with Real-Time Query enabled, receiving redo from the primary with the LOG_ARCHIVE_DEST_n attributes SYNC

Correct answer: B

Explanation

Answer B is correct because it ensures that the physical standby database can operate in maximum protection mode with no data lag, as it uses synchronous transport. Other options either do not meet the requirement for maximum protection mode or involve configurations that would not eliminate lag effectively, such as asynchronous transport or multiple standby databases without addressing the lag issue.