MongoDB Quiz

A ___?___ is a grouping of MongoDB documents and is the equivalent of a table in relational databases.

The documents in a multiple collection in MongoDb need to have the same set of fields and the data type for a field can differ across documents within a collection.

• True

• False

What is the primary method used for connecting tables in a Nosql database?

• embedding

• referencing

• N/A

Which MongoDB query operator allows you to update specific elements in an embedded array?

• $push

• $addToSet

• $elemMatch

• $set

In a school project, how can you represent a one-to-many relationship using embedding?

• Storing foreign keys

• Storing an array of sub-documents

• Using $lookup aggregation

• Creating separate collections

Why did Ethan choose to reference instead of embedding in MongoDB?

• To simplify data retrieval

• To optimize query performance

• To handle one-to-many relationships

• To avoid data duplication and inconsistency

What is the main benefit of using embedding in MongoDB?

• Reduced data duplication

• Easier to update related data

• Improved query performance for complex joins

• All of the above

When should you consider using referencing instead of embedding in MongoDB?

• For one-to-one relationships

• When query performance is critical

• When data consistency is a top priority

• For denormalized data structures

How does embedding in a school database affect the storage size of student records?

• Increases the size significantly

• Decreases the size significantly

• Has no impact on the size

• Depends on the number of courses taken by each student

In a school project, Evelyn is tasked with capturing relationships between different subjects by storing related information in a single document structure. What method should Evelyn use for this purpose?