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Common MongoDB Questions for Beginners

The MongoDB shell uses which programming language?

“The mongo shell is an interactive JavaScript interface to MongoDB” (MongoDB).

https://docs.mongodb.com/v4.4/mongo/

The document data structure resembles which traditional relational database element?

The MongoDB manual states that a document in MongoDB is a row in a relational database. W can use

David Huner’s input from istouchidhackedyet.com that “a tuple is simply a row contained in a table in the tablespace.”

With this information, we can say that a document data structure resembles a tuple element in a traditional database.

https://istouchidhackedyet.com/what-is-a-tuple-in-the-database/

Which MongoDB aggregation operator maps to the SQL “ORDER BY” term?

The MongoDB manual states that the sort() operator in MongoDB is equivalent to the “ORDER BY” in SQL.

https://docs.mongodb.com/manual/reference/sql-comparison/#sql-to-mongodb-mapping-chart

Which MongoDB feature can be used to enhance the performance of queries?

The MongoDB manual states that “Indexes also improve efficiency on queries that routinely sort on a given field.” In short, indexes can be used to enhance the performance of queries.

https://docs.mongodb.com/manual/tutorial/optimize-query-performance-with-indexes-and-projections/

Does MongoDB support horizontal scaling out?

According to the MongoDB manual, MongoDB “MongoDB supports horizontal scaling through sharding.”

https://docs.mongodb.com/manual/sharding/