10 questions on MongoDB architecture.

 1. Question: What is MongoDB?

   - Answer: MongoDB is a NoSQL document-oriented database management system. It stores data in flexible, JSON-like documents with dynamic schemas, allowing for a more natural representation of complex structures.

 

2. Question: What is a BSON in MongoDB?

   - Answer: BSON (Binary JSON) is a binary-encoded serialization of JSON-like documents used in MongoDB. It extends the JSON model to provide additional data types and to efficiently represent more complex structures.

 

3. Question: Explain the concept of a MongoDB document.

   - Answer: A MongoDB document is a record in a collection, similar to a row in a relational database. It is a JSON-like data structure with key-value pairs, where values can include other documents, arrays, and data types like strings and numbers.

 

4. Question: What is a MongoDB collection?

   - Answer: A MongoDB collection is a group of MongoDB documents. It is the equivalent of a table in a relational database. Collections do not enforce a schema, allowing documents within a collection to have different fields.

 

5. Question: How does MongoDB handle relationships between documents?

   - Answer: MongoDB supports embedded documents and references for handling relationships. In embedded documents, one document can contain another document as a field. References involve linking documents using unique identifiers.

 

6. Question: Explain the purpose of the MongoDB Atlas service.

   - Answer: MongoDB Atlas is a fully managed cloud database service for MongoDB. It provides automated provisioning, scaling, and management of MongoDB clusters, making it easier to deploy and maintain MongoDB databases in the cloud.

 

7. Question: What is a MongoDB Index, and why is it important?

   - Answer: A MongoDB Index is a data structure that improves the speed of data retrieval operations on a MongoDB collection. It allows MongoDB to efficiently locate and access specific documents in a collection, enhancing query performance.

 

8. Question: How does MongoDB ensure high availability and fault tolerance?

   - Answer: MongoDB achieves high availability through replica sets. A replica set consists of multiple MongoDB instances, where one is the primary node, and the others are secondary nodes. If the primary node fails, one of the secondaries is automatically promoted to the primary role.

 

9. Question: What is the MongoDB Aggregation Framework?

   - Answer: The MongoDB Aggregation Framework is a powerful tool for performing data transformations and computations on documents within a collection. It includes a set of operators to filter, project, group, and reshape data.

 

10. Question: How does MongoDB handle sharding?

    - Answer: MongoDB uses sharding to horizontally partition data across multiple servers or shards. Each shard is a separate database, and the data is distributed based on a sharding key. Sharding allows MongoDB to scale horizontally and handle large datasets.

 

These questions provide a basic understanding of MongoDB and its key features.