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Question 16

You administer a RAC database that currently runs on a four-node cluster but which has three instances.

Which two statements are always true about redo logs for this RAC database? (Choose two.)

A thread of redo must be created before starting a fourth instance if a thread is not already available.

A thread of redo is automatically dropped when an instance is removed from a RAC database by using SRVCTL.

All the instances must have the same number of redo log groups and each group must have the same number of redo log members.

A redo log group added using ALTER DATABASE ADD LOGFILE without the INSTANCE clause is added to each instance.

A thread of redo must contain at least two log groups before it can be enabled.

Correct Answer: A, E

A thread of redo must be created before starting a fourth instance if a thread is not already available. This ensures that each instance has its own thread of redo for transaction recovery and management. Additionally, a thread of redo must contain at least two log groups before it can be enabled, as this is a requirement for the proper functioning of the redo log mechanism within RAC environments to ensure data integrity and availability.

Discussion

Test_1Options: AE

I think A E correct answer.