MongoDB
Interview Questions
MongoDB Interview Questions Q: When would you choose MongoDB over PostgreSQL? Choose MongoDB when: documents naturally belong together and don't need to be join…
MongoDB Interview Questions Q: When would you choose MongoDB over PostgreSQL? Choose MongoDB when: documents naturally belong together and don't need to be join…
CRUD & Queries Core Concepts Document — JSON-like record (BSON internally) Collection — group of documents (like a table, but schema-less) _id — auto-created Ob…
Aggregation & Indexes Aggregation Pipeline Stages are processed in order, each stage's output is the next stage's input. const pipeline = [ // $match — filter (…
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