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QWhat is the snapshot read concern introduced in MongoDB 4.0 used for?

ID: #6890 MongoDB 110 views
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#6890Q ID
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  • 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: 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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