Which would be an example of using insertOne() in practice?

Using insertOne() is specifically designed for adding new documents to a MongoDB collection. It takes a single document as input and inserts it into the specified collection. When you want to create a new record—like adding a new user profile—this method is the appropriate choice.

In practical scenarios, when you are creating a new user, you would construct a document that includes all relevant fields (like username, email, and password), and then call insertOne() with that document as an argument. This operation ensures that the new information is stored in the database correctly.

The other choices involve operations that do not align with the purpose of insertOne(). Updating a user profile pertains to modifying existing data, deleting a document involves removing it from the database, and querying involves retrieving data without alteration. Each of these tasks requires different methods that are tailored for those specific actions.