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An index can support sort operations on a non-prefix subset of the index key pattern using _________ condition.

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+1 vote
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in MongoDB by (131k points)
An index can support sort operations on a non-prefix subset of the index key pattern using _________ condition.

(a) predicate

(b) selection

(c) equality

(d) none of the mentioned

This question was addressed to me during an interview.

My query is from Indexing Strategies topic in chapter Index/Indexing Concepts of MongoDB

1 Answer

+1 vote
by (652k points)
selected by
 
Best answer
Correct answer is (c) equality

Best explanation: Query must include equality conditions on all the prefix keys that precede the sort keys.

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