Updating Documents

The video tutorial covers updating documents in MongoDB using promises instead of callbacks. It begins with an introduction to the updateOne method, explaining how to use it with promises and update operators like $set and $inc. The tutorial includes a challenge to use the updateMany method to update multiple documents. The session concludes with a brief introduction to the next topic, which is deleting documents in MongoDB.

What is the primary focus of the tutorial in updating MongoDB documents?

• Using callbacks for updates

• Using promises for updates

• Using SQL for updates

• Using Python for updates

Which method is used to update a single document in MongoDB?

• updateMany

• findOne

• insertOne

• updateOne

What is the purpose of the $set operator in MongoDB?

• To delete a document

• To insert a new document

• To set new values for fields

• To find a document

How can you increment a numerical field in a MongoDB document?

• Using $set

• Using $unset

• Using $inc

• Using $rename

Which operator would you use to remove a specific field from a document?

• $set

• $inc

• $unset

• $rename

What is the main difference between updateOne and updateMany?

• updateOne is faster than updateMany

• updateOne is deprecated, updateMany is not

• updateOne is for reading, updateMany is for writing

• updateOne updates one document, updateMany updates multiple documents

What should you do if you want to update all documents in a collection to be marked as complete?

• Use insertMany

• Use findOne and update

• Use updateMany with a filter

• Use updateOne with a loop

What is the purpose of the promise methods .then and .catch?

• To handle database connections

• To handle user input

• To handle asynchronous operations

• To handle synchronous operations

What is the result of a fulfilled promise in the context of MongoDB updates?

• A new database connection

• The result object with modified count

• The updated document

• An error message

What is the next topic to be covered after updating documents in the CRUD operations?

• Inserting documents

• Deleting documents

• Reading documents

• Creating documents