What methods are available for deleting documents in MongoDB?

The methods available for deleting documents in MongoDB are deleteOne() and deleteMany().

The deleteOne() method is specifically designed to remove a single document that matches a given filter from a collection. When using this method, if multiple documents match the filter criteria, only the first document encountered will be removed. This provides a way to delete a specific item while ensuring that others remain intact.

On the other hand, the deleteMany() method allows you to remove multiple documents that fit the specified filter criteria. This method is useful when you want to purge several documents based on similar attributes or values, without needing to call the delete operation multiple times.

The other choices do not correspond to actual methods used in MongoDB. For instance, removeOne() and removeMany() were deprecated and are no longer recommended; the preferred methods are now deleteOne() and deleteMany(). Similarly, eraseOne() and eraseMany() do not exist in the MongoDB API, nor do dropOne() and dropMany(), which also do not represent the correct operations for deleting documents. Understanding these methods is crucial for effectively managing and manipulating data in MongoDB collections.