Question

Point out the wrong statement.

(a) Queries need an index to return documents in insertion order

(b) The options document creates a capped collection or preallocates space in a new ordinary collection

(c) Capped collections have maximum size or document counts that prevent them from growing beyond maximum thresholds

(d) None of the mentioned

This question was addressed to me during an interview for a job.

My question comes from Capped Collections topic in section Monitoring MongoDB and Optimization Strategies for MongoDB of MongoDB

Answer 1

Right option is (a) Queries need an index to return documents in insertion order

Explanation: Capped collections guarantee preservation of the insertion order.