Answer
MongoDB is schema-flexible, allowing documents with different structures. Schema rules can be enforced using validators when needed.
Quick Answer
MongoDB is schemaless by default - no schema definition required. But you can enforce structure using Schema Validation (JSON Schema rules defined on the collection). This lets you have flexible schemas during development but add validation rules as the app matures. Most applications use Mongoose (Node.js) or similar ODM to define schemas at the application layer.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ