Follow the request/data flow through the architecture.
Work through each concept and mark it understood. This unlocks the knowledge check.
A synchronous standby database in a second AZ with automatic failover.
Why it matters
Survives an AZ failure with no data loss and minimal downtime.
When to use it
Enable for any production database.
Gotcha (exam trap)
The standby does NOT serve reads — it exists purely for failover. You cannot query it.
Finish the walkthrough above to unlock the check.
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