MongoDB: Update III (MCQ)

MongoDB: Update III (MCQ)

MongoDB: Update III (MCQ) 

Which of the following statements about the query are true?

 

db.inventory.update( { tags: { $nin: [ "appliances", "school" ] } }, { $set: { sale: false } } )

This operation will set the sale field value in the inventory collection where the tags field holds an array with no elements matching an element in the array ["appliances", "school"]

The tags field of the document cannot be an array in order for this query to work

This operation will set the sale field value in the inventory collection where a document does not contain the tags field.

None of the above