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Assuming an exam collection containing questions with 'topic', 'question', and 'pointValue' fields, which most accurately describes what the following set of commands do ? let

Assuming an exam collection containing questions with 'topic', 'question', and
'pointValue' fields, which most accurately describes what the following set of
commands do?
let stage1={ $match: { topic: "MongoDB" }}
let stage $sort: pointValue: -1
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