Question 1

True or false: MongoDB stores data in a binary JSON format called BSON.

Accepted Answer

True. BSON (Binary JSON) extends JSON with additional data types like Date and Binary, enabling efficient storage and faster parsing.

Question 2

True or false: MongoDB uses SQL as its primary query language.

Accepted Answer

False. MongoDB uses a document-based query language (BSON) with methods like find() and aggregate(), not SQL.

Question 3

True or false: MongoDB uses a fixed schema, like traditional relational databases.

Accepted Answer

False. MongoDB is schema-less, allowing documents in the same collection to have different fields, offering flexibility.

Question 4

True or false: MongoDB cannot handle geospatial queries without third-party plugins.

Accepted Answer

False. MongoDB has built-in geospatial indexes and operators (like $near and $geoWithin) for location-based queries.

Question 5

True or false: MongoDB was originally developed as a cloud-only database service.

Accepted Answer

False. MongoDB started as an open-source, on-premise database in 2007; its cloud service MongoDB Atlas launched much later.

Question 6

True or false: MongoDB supports multi-document ACID transactions since version 4.0.

Accepted Answer

True. Introduced in 4.0, MongoDB added multi-document ACID transactions, making it suitable for complex transactional workloads.

Question 7

True or false: MongoDB can run JavaScript directly inside its queries using $where.

Accepted Answer

True. Yes, MongoDB's $where operator allows executing arbitrary JavaScript expressions, though it's slower and not recommended for production.

Question 8

True or false: MongoDB’s default storage engine, WiredTiger, includes built-in compression.

Accepted Answer

True. WiredTiger, the default engine since MongoDB 3.2, provides both block-level and prefix compression to reduce storage.

MongoDB Trivia Questions