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Interview Questions
MongoDB interview questions on document modeling, aggregation, and scaling.
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Top MongoDB Interview Questions
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1
When to use MongoDB vs SQL?
Hint: Schema flexibility, use cases
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2
Explain the aggregation pipeline
Hint: $match, $group, $lookup
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3
How does sharding work?
Hint: Horizontal scaling, shard keys
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4
What is a replica set?
Hint: High availability, failover
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5
How to model relationships?
Hint: Embedding vs referencing
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6
Explain MongoDB indexes
Hint: Single, compound, text, geospatial
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