Which of the following MongoDB operators would allow you to find documents that must have a specific field value?

The operator that enables you to find documents with a specific field value is the $eq operator. This operator is used to match documents where the value of a specified field is equal to a given value. It essentially filters the documents in the collection and returns only those that meet the condition of having the exact field value you specified.

For example, if you want to find all documents where the field "status" is equal to "active," you would use the $eq operator in your query. This guarantees that the query results contain only those documents that have "active" as the value for the "status" field.

The other operators have different functionalities that do not strictly match documents to a specific, single field value. The $in operator checks for multiple possible values but does not ensure a document has a specific value exclusively. The $gte operator is used for finding values greater than or equal to a specified value, while the $ne operator is used for documents where the field value is not equal to a specified value, which is not intended to find equality. Therefore, $eq is the most suitable operator for ensuring that documents contain exactly the specified field value.