- A To allow anyone to have full access to the database
- B To eliminate the phenomenon of documents being missed during queries against an index
- C To address the issue of MongoDB returning stale reads
- D None of the above
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Answer:
B
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Answer: To eliminate the phenomenon of documents being missed during queries against an index
Explanation: Prior to MongoDB 4.0, queries against an index were not atomic . Documents which were being updated while the query was running could be missed . The introduction of the snapshot read concern in MongoDB 4.0 eliminated this phenomenon.
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