Explanation:On replica sets, the TTL background thread only deletes documents on the primary. 7. A collection with a TTL index has __________ enabled.
A. usePowerOf3Sizes
B. usePowerOf2Sizes
C. usePowerOf4Sizes
D. None of the mentioned
Answer:A
Explanation:On replica sets, the TTL background thread only deletes documents on the primary. 7. A collection with a TTL index has __________ enabled.
A. usePowerOf3Sizes B. usePowerOf2Sizes C. usePowerOf4Sizes D. None of the mentioned
Explanation: As a result of enabling usePowerOf2Sizes, MongoDB must allocate more disk space relative to data size. 8. Which field does not support TTL indexes ?