MongoDB Mastering MongoDB for Beginners (Theory and Projects) - Solution (Update Operators) - `10

The video tutorial explains how to add tags to documents using two methods: the push operator and the add to set operator. The push operator adds specified tags to all documents, while the add to set operator prevents duplicate tags. The tutorial demonstrates both methods and concludes that either approach is valid for adding tags to documents.

What are the two operators mentioned for adding tags to documents?

• Insert and Update

• Push and Add to Set

• Delete and Replace

• Merge and Split

Which operator allows adding multiple elements to an array field in documents?

• Replace

• Push

• Add to Set

• Insert

What is the purpose of the each operator when using the push method?

• To add multiple elements to an array

• To add a single element to an array

• To remove elements from an array

• To update a document field

What happens when using the add to set operator if the elements are already present?

• The elements are duplicated

• The elements are updated

• The elements are ignored

• The elements are removed

Which method ensures no duplicate elements are added to an array?

• Push

• Replace

• Insert

• Add to Set