Quick Answer
Majority read concern returns data that has been committed to a majority of replica set members - guarantees the data won't roll back. Linearizable read concern goes further - it guarantees you read the absolute latest committed write, waiting for all in-flight writes to complete first. Linearizable is single-document only, much slower, but provides the strongest consistency for critical reads.
Answer
Majority reads reflect replicated data, while linearizable reads guarantee strict ordering by requiring primary confirmation.
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Verified Answer
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