MongoDB is a NoSQL document database that stores data in flexible JSON-like documents, providing scalability, performance, and easy development with dynamic schemas.

What is a document in MongoDB?

A document in MongoDB is a record stored as a BSON object, similar to JSON, containing field-value pairs. It's the basic unit of data in MongoDB collections.

What is aggregation in MongoDB?

Aggregation is a framework in MongoDB for processing and transforming documents through a pipeline of stages like match, group, project, and sort for complex data analysis.

Mongo DB Interview Questions

1. What is MongoDB and what problems does it solve?

2. How does MongoDB differ from relational databases?

3. What are the core features of MongoDB?

4. What are documents and collections in MongoDB?

5. How does BSON differ from JSON?

6. What are the advantages and limitations of schema-less databases?

7. How does MongoDB handle dynamic schemas?

8. What are common use cases for MongoDB?

9. What are the tradeoffs between SQL and NoSQL databases?

10. How does MongoDB store documents internally?