AWS Certified Database – Specialty — Question 135

A database specialist has a fleet of Amazon RDS DB instances that use the default DB parameter group. The database specialist needs to associate a custom parameter group with some of the DB instances.
After the database specialist makes this change, when will the instances be assigned to this new parameter group?

Answer options

• A. Instantaneously after the change is made to the parameter group
• B. In the next scheduled maintenance window of the DB instances
• C. After the DB instances are manually rebooted
• D. Within 24 hours after the change is made to the parameter group

Correct answer: C

Explanation

The correct answer is C because the changes to the parameter group will only take effect after the DB instances are manually rebooted. Options A and D are incorrect as they suggest immediate or delayed application without rebooting. Option B is also wrong because the new parameter group takes effect immediately after a manual reboot, not during the maintenance window.