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A collection with a TTL index has __________ enabled.

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A collection with a TTL index has __________ enabled.

(a) usePowerOf3Sizes

(b) usePowerOf2Sizes

(c) usePowerOf4Sizes

(d) none of the mentioned

I had been asked this question in an online interview.

My question is from Data from Collections in portion Monitoring MongoDB and Optimization Strategies for MongoDB of MongoDB

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Correct option is (b) usePowerOf2Sizes

To explain I would say: As a result of enabling usePowerOf2Sizes, MongoDB must allocate more disk space relative to data size.

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