Question

Point out the correct statement.

(a) If you build a TTL index in the foreground, MongoDB does not remove expired documents as soon as the index finishes building

(b) The TTL index does guarantee that expired data will be deleted immediately upon expiration

(c) Duration of the removal operation depends on the workload of your mongod instance

(d) None of the mentioned

The question was asked in quiz.

The question is from Index Properties in section Index/Indexing Concepts of MongoDB

Answer 1

Correct option is (c) Duration of the removal operation depends on the workload of your mongod instance

The best I can explain: There may be a delay between the time a document expires and the time that MongoDB removes the document from the database.