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System Design Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
System Design
Why is choosing read replicas (rather than sharding) the natural first move for the news feed's read-heavy load, per the Database Design topic's reasoning applied here?
A
Sharding is always strictly better regardless of context
B
The bottleneck described is read volume on a dataset that isn't necessarily too large for one machine or write-bound — exactly the scenario read replicas address, while sharding solves a different problem (write throughput/dataset size)
C
Read replicas and sharding are interchangeable and the choice doesn't matter
D
Feeds cannot use sharding under any circumstances
Check Answer