What are the return values of delete operations in MongoDB?

In MongoDB, the return values of delete operations include an acknowledgment of the command execution and the count of the documents that were deleted. Specifically, when a delete operation is executed, MongoDB provides a response indicating whether the operation was acknowledged. This acknowledgment is crucial because it informs the user that the command was received and processed by the server. Alongside this acknowledgment, the deletedCount field is included in the response, which specifies the number of documents that were successfully deleted from the database.

This understanding aligns with MongoDB's design for managing operations, where operations on the database not only need to confirm success but also provide detailed feedback, such as the count of affected documents. The term "acknowledged" thus perfectly encapsulates the nature of the response for delete operations, marking its importance in ensuring that users can trust the operation's success and understand the impact of their command. This feature is a fundamental part of MongoDB's usability, helping developers and database administrators manage and verify their database interactions effectively.