Answer
Majority write concern ensures writes are replicated to most nodes, preventing data loss after failovers.
Quick Answer
Majority write concern (w: "majority") ensures the write is acknowledged by the majority of replica set members before returning success. If the primary fails and a new primary is elected, a majority-acknowledged write is guaranteed to be present on the new primary. Without majority concern, writes acknowledged only by the primary can be rolled back during failover.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ