Why insert operations matter in MongoDB - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to insert a single document into the collection.

MongoDB

db.users.[1]({ name: "Alice", age: 30 })

Drag options to blanks, or click blank then click option'

AinsertOne

BfindOne

CdeleteOne

DupdateOne

Attempts:

3 left

💡 Hint

Common Mistakes

Using findOne instead of insertOne will only search, not add.

Using updateOne or deleteOne changes or removes documents, not insert.

The insertOne method adds a single document to the collection.

2fill in blank

medium

Complete the code to insert multiple documents at once.

MongoDB

db.orders.[1]([{ item: "book", qty: 3 }, { item: "pen", qty: 10 }])

Drag options to blanks, or click blank then click option'

AinsertOne

BinsertMany

Cfind

DdeleteMany

Attempts:

3 left

💡 Hint

Common Mistakes

Using insertOne with an array will cause an error.

Using find or deleteMany does not add documents.

The insertMany method adds multiple documents in one operation.

3fill in blank

hard

Fix the error in the insert operation to add a document correctly.

MongoDB

db.products.insertOne({ name: "Laptop", price: [1] })

Drag options to blanks, or click blank then click option'

Anull

B"1000"

Cprice

D1000

Attempts:

3 left

💡 Hint

Common Mistakes

Putting numbers inside quotes stores them as strings.

Using null will not set a price.

The price should be a number, not a string, to store it correctly.

4fill in blank

hard

Fill both blanks to insert a document with a nested address field.

MongoDB

db.customers.insertOne({ name: "Bob", address: { city: [1], zip: [2] } })

Drag options to blanks, or click blank then click option'

A"Seattle"

B98101

C"New York"

D12345

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers without quotes for city causes errors.

Putting zip code in quotes stores it as a string.

The city should be a string and zip a number to represent the address correctly.

5fill in blank

hard

Fill all three blanks to insert a document with a date and status.

MongoDB

db.tasks.insertOne({ title: [1], dueDate: new Date([2]), status: [3] })

Drag options to blanks, or click blank then click option'

A"Finish report"

B"2024-06-01"

C"pending"

D"completed"

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around strings causes syntax errors.

Passing date without quotes to Date constructor causes errors.

The title and status are strings, and the date is passed as a string to the Date constructor.