MediumApplySystem Design Interview FrameworkMultiple Choice
A database primary server goes down. What is the standard recovery sequence?
Apply — Tests ability to use knowledge in practical scenarios.
Answer Options
ARestart the primary server and replay the WAL log
BHealth check detects failure → promote a replica to primary → retry queued writes
CDelete the failed node and provision a new one from a backup
DRoute all traffic to the cache until the primary recovers
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