Câu 5: C100DBA: MongoDB Associate Database Administrator

A database administrator is responsible for maintaining a MongoDB database for a used cars website. The database includes the following sample data: The administrator needs to write an index for this type of common query: The administrator knows that the fields cardinality from lowest to highest are: “dealership”; “make”; “mileage”; “vin”.What will be the first field of the index?

1. A. “mileage”
2. B. “make”
3. C. “dealership” — đáp án hiện tại
4. D. “vin”