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MongoDB C100DBA Exam - Topic 1 Question 23 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 23
Topic #: 1
[All C100DBA Questions]

As per the aggregation pipeline optimization concepts, if you have a $sort followed by a $match:

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Suggested Answer: D

by Donette at May 08, 2022, 06:41 PM

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Truman
7 months ago
Just to clarify, $match is more efficient before $sort, right?
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Nathalie
7 months ago
I thought $sort always had to be first, interesting!
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Melvin
7 months ago
Wait, are you saying MongoDB doesn't rearrange those by default?
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Kanisha
7 months ago
I disagree, the order shouldn't matter that much.
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Bethanie
8 months ago
$match should definitely come before $sort for better performance.
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Ruth
8 months ago
I believe $sort moves before $match, but I need to double-check if that's the best practice for optimization.
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Jennifer
8 months ago
I’m a bit confused; I thought MongoDB always executed operations in the order they are written, but maybe there are exceptions?
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Pura
8 months ago
I practiced a similar question, and I feel like $match should come before $sort to reduce the dataset size first.
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Stanford
8 months ago
I think I remember that the order of $sort and $match can actually affect performance, but I'm not sure which one should come first.
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Leonor
8 months ago
This question seems straightforward, but I want to make sure I understand the requirements fully before answering.
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Theodora
8 months ago
I've got a good feeling about this one. The Service Catalogue plus the business criticality information is exactly what I would need to do a thorough risk analysis. I'm confident I can nail this question.
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