8 of 8 questions
// Interview Deck · MONGODB-AGGREGATION
MongoDB Aggregation
Pipelines, stages, and the aggregation framework for when a simple find() isn't enough.
01
Intermediate
What is the aggregation pipeline and why does it exist (vs regular find())?
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02
Intermediate
What does the $match stage do?
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03
Advanced
What does the $group stage do?
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04
Intermediate
What are accumulator operators ($sum, $avg, $min, $max, $push, $addToSet)?
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05
Intermediate
What does the $project stage do?
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06
Intermediate
How do $sort, $limit, and $skip work within an aggregation pipeline?
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07
Advanced
What does the $lookup stage do (joining data across collections)?
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08
Advanced
What does the $unwind stage do?
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