MongoDB Interview Questions Your Guide to Success
MongoDB is a leading NoSQL database. Jobpe’s MongoDB interview questions cover document modeling, querying, replication, and sharding.
mongodb
- Database
What is MongoDB and what kind of database is it?
MongoDB is a NoSQL, document-oriented database designed for scalability and flexibility.
Explain the concept of collections and documents in MongoDB.
Collections are groups of documents, which are JSON-like objects storing data in MongoDB.
How does MongoDB handle indexing?
MongoDB supports various index types to improve query performance, such as single field, compound, and text indexes.
What are MongoDB aggregations?
Aggregation frameworks allow for processing data and returning computed results similar to SQL GROUP BY queries.
Describe how replication works in MongoDB.
Replication in MongoDB creates multiple copies of data to ensure availability and redundancy.
What is sharding in MongoDB?
Sharding distributes data across multiple machines to support horizontal scaling.
How does MongoDB ensure consistency and durability?
MongoDB uses write concern settings and journaling to guarantee data durability and consistency.
What are some common use cases for MongoDB?
Use cases include content management, real-time analytics, IoT, and applications needing flexible schema.
How do you perform CRUD operations in MongoDB?
CRUD operations in MongoDB are performed using methods like insertOne, find, updateOne, and deleteOne.
Explain the difference between embedded documents and references in MongoDB.
Embedded documents store related data within a single document; references link documents across collections.
Database
What is MongoDB and what kind of database is it?
MongoDB is a NoSQL, document-oriented database designed for scalability and flexibility.
Explain the concept of collections and documents in MongoDB.
Collections are groups of documents, which are JSON-like objects storing data in MongoDB.
How does MongoDB handle indexing?
MongoDB supports various index types to improve query performance, such as single field, compound, and text indexes.
What are MongoDB aggregations?
Aggregation frameworks allow for processing data and returning computed results similar to SQL GROUP BY queries.
Describe how replication works in MongoDB.
Replication in MongoDB creates multiple copies of data to ensure availability and redundancy.
What is sharding in MongoDB?
Sharding distributes data across multiple machines to support horizontal scaling.
How does MongoDB ensure consistency and durability?
MongoDB uses write concern settings and journaling to guarantee data durability and consistency.
What are some common use cases for MongoDB?
Use cases include content management, real-time analytics, IoT, and applications needing flexible schema.
How do you perform CRUD operations in MongoDB?
CRUD operations in MongoDB are performed using methods like insertOne, find, updateOne, and deleteOne.
Explain the difference between embedded documents and references in MongoDB.
Embedded documents store related data within a single document; references link documents across collections.
