Sharding, transactions, change streams, and performance optimization
What is sharding in MongoDB?
What is a shard key?
What are MongoDB transactions?
What is the oplog in MongoDB?
What is GridFS?
What are change streams in MongoDB?
What are read and write concerns?
What is the $expr operator used for?
What is the MongoDB connection string format?
What are MongoDB schema validation rules?
What is the bulkWrite operation?
What types of indexes does MongoDB support?
What is the difference between deleteOne() and the deprecated remove()?
What are aggregation pipeline performance best practices?
What are the different types of relationships in MongoDB data modeling?
