Insert with arrays in MongoDB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does inserting with arrays mean in MongoDB?

It means adding multiple documents at once by passing an array of objects to the insertMany() method.

beginner

How do you insert multiple documents in MongoDB using an array?

Use the insertMany() method and pass an array of documents as the argument.

beginner

What is the difference between insertOne() and insertMany() in MongoDB?

insertOne() adds a single document, while insertMany() adds multiple documents using an array.

intermediate

Can you insert an empty array of documents in MongoDB?

No, inserting an empty array with insertMany() will not add any documents; the operation succeeds without error.

intermediate

What happens if one document in the array fails to insert in insertMany()?

By default, insertMany() stops and returns an error; you can set ordered:false to continue inserting others.

Which MongoDB method inserts multiple documents at once?

A insertAll()

B insertOne()

C insertMany()

D insertArray()

insertMany() is the correct method to insert multiple documents using an array.

What type of argument does insertMany() expect?

A An array of document objects

B A single document object

C A string

D A number

insertMany() expects an array of document objects to insert multiple documents.

If one document fails during insertMany(), what happens by default?

A All documents are inserted anyway

B The operation stops and returns an error

C Only the failed document is skipped

D The database crashes

By default, insertMany() stops and returns an error if any document fails.

Which option allows insertMany() to continue inserting after an error?

A ordered:false

B ordered:true

C continue:true

D skipErrors:true

Setting ordered:false allows insertMany() to continue inserting documents even if some fail.

Can you insert an empty array with insertMany()?

A Yes, it inserts an empty document

B Yes, it inserts a null document

C Only if you set a special flag

D No, it does nothing

Inserting an empty array does nothing; no documents are added.

Explain how to insert multiple documents in MongoDB using arrays.

Think about the method name and what it expects as input.

Describe what happens if one document in an insertMany array fails to insert.

Consider the default behavior and how to change it.