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Question

When using $first in a $group stage, the $group stage should follow a _______ stage to have the input documents in a defined order.

a.

$order

b.

$sort

c.

$asc

d.

None of the mentioned

Posted under Aggregation Concepts and Aggregation Mechanics MongoDB

Answer: (b).$sort

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Q. When using $first in a $group stage, the $group stage should follow a _______ stage to have the input documents in a defined order.
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