1 / 5
A 'read replica' is added to scale a database. What does it handle?
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Read replicas serve read traffic so the primary can focus on writes, improving read scalability.
2 / 5
The team implements 'read/write splitting'. What does that mean?
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Read/write splitting sends writes to the primary and distributes reads across replicas.
3 / 5
A user sees stale data due to 'replication lag'. What is it?
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Replication lag is the time it takes for a write on the primary to propagate to replicas.
4 / 5
Because of lag, replicas offer 'eventual consistency'. What does that mean?
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Eventual consistency means replicas catch up eventually, though a read right after a write may be stale.
5 / 5
Which sentence correctly uses 'failover'?
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Failover promotes a replica to primary when the original primary becomes unavailable.