MongoDB Mastering MongoDB for Beginners (Theory and Projects) - Solution ($in)

What is the first step in working with data in MongoDB as described in the video?

• Writing a query

• Creating a collection

• Deleting a collection

• Creating a new database

Which operator is used to filter documents based on multiple quantity values?

• not

• in

• or

• and

When filtering by sizes, why is it important to reference nested fields correctly?

• To reduce database size

• To avoid syntax errors

• To ensure the correct data is retrieved

• To improve query performance

What must be ensured when using the 'in' operator with string values?

• The values are in uppercase

• The values are in lowercase

• The values are provided as strings

• The values are provided as integers

Which field is used to filter documents by item codes in the video?

• product_code

• item

• code

• item_code

What is the purpose of using the 'in' operator with tags?

• To find documents with any tag

• To sort documents by tags

• To find documents with specific tags

• To exclude certain tags

What happens if there is a type mismatch when using the 'in' operator?

• The query will return all documents

• The query will return duplicate documents

• The query will return no documents

• The query will return incorrect documents