insertMany method in MongoDB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the insertMany method do in MongoDB?

The insertMany method adds multiple documents to a collection in one operation. It is faster than inserting documents one by one.

beginner

How do you use insertMany to add documents?

You call insertMany on a collection and pass an array of documents. For example: db.collection.insertMany([{name: 'Alice'}, {name: 'Bob'}]).

intermediate

What happens if one document fails to insert in insertMany?

By default, if one document fails, insertMany stops and no more documents are inserted. You can change this with the ordered option.

intermediate

What is the purpose of the ordered option in insertMany?

The ordered option controls if documents are inserted in order. If ordered: false, MongoDB tries to insert all documents even if some fail.

beginner

Can insertMany return information about the inserted documents?

Yes, insertMany returns an object with insertedCount and insertedIds showing how many and which documents were added.

What type of argument does insertMany expect?

A A string

B A single document

C A number

D An array of documents

insertMany requires an array of documents to insert multiple at once.

What does setting ordered: false do in insertMany?

A Stops inserting after first error

B Inserts documents in reverse order

C Continues inserting even if some documents fail

D Deletes existing documents before inserting

With ordered: false, MongoDB tries to insert all documents even if some fail.

What does insertMany return after insertion?

A Number of documents inserted and their IDs

B Only the first inserted document

C Nothing

D The collection schema

insertMany returns an object with insertedCount and insertedIds.

Which method is faster for adding many documents at once?

A insertOne

B insertMany

C find

D updateMany

insertMany is optimized to insert multiple documents faster than calling insertOne repeatedly.

If one document is invalid, what is the default behavior of insertMany?

A Stop inserting and throw an error

B Insert all documents anyway

C Ignore the invalid document and continue

D Delete all documents in the collection

By default, insertMany stops inserting when a document fails and returns an error.

Explain how to use the insertMany method to add multiple documents to a MongoDB collection.

Think about how you add many items to a list at once.

Describe what happens when one document fails to insert during an insertMany operation and how to control this behavior.

Consider if you want to stop or keep going when a problem happens.