Which method would you use to add multiple documents simultaneously in MongoDB?

The method used to add multiple documents simultaneously in MongoDB is the one known as insertMany(). This method is specifically designed for cases where you need to insert an array of documents into a collection in a single operation, making it much more efficient than inserting documents one by one.

When using insertMany(), you can pass an array of document objects, and MongoDB processes all of them in one command. This not only enhances performance by reducing the number of network round trips but also allows you to handle bulk data insertion effectively, which is particularly important in high-throughput applications or scenarios where large volumes of data need to be loaded quickly.

In contrast, methods like insertOne() are meant for inserting a single document at a time, which would not be efficient for bulk operations. updateMany() is used to modify existing documents based on specified criteria rather than inserting new documents. The find() method is primarily for retrieving documents from a collection, not for adding new ones. Therefore, insertMany() is the correct choice for adding multiple documents at once.