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The names of rollback files have the following form.

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The names of rollback files have the following form.

(a) <database>.<collection>.<timestamp>.bson.

(b) <database>.<collection>.<tp>.bson.

(c) <database>.<collection>.<timestamp>.json.

(d) None of the mentioned

This question was posed to me in a national level competition.

This key question is from Replica Set High Availability topic in division Replication Concepts, Processes and Replication Set of MongoDB

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Correct choice is (a) <database>.<collection>.<timestamp>.bson.

The explanation is: Administrators must apply rollback data manually after the member completes the rollback and returns to secondary status.

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