deleteOne method in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to delete one document where the name is 'Alice'.

MongoDB

db.collection('users').deleteOne({ name: [1] })

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

A'Alice'

BAlice

C"name"

D'name'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around string values

Using the field name as the value instead of the actual value

The deleteOne method requires a filter object. The value for the name field must be a string, so it needs quotes like 'Alice'.

2fill in blank

medium

Complete the code to delete one document where the age is 30.

MongoDB

db.collection('users').deleteOne({ age: [1] })

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

A'30'

B'age'

C"age"

D30

Attempts:

3 left

💡 Hint

Common Mistakes

Putting numbers inside quotes, making them strings

Using the field name as the value

The age field is a number, so the value should be the number 30 without quotes.

3fill in blank

hard

Fix the error in the code to delete one document where the status is 'active'.

MongoDB

db.collection('users').deleteOne({ status: [1] })

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

A'active'

Bactive

C"status"

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted strings causing reference errors

Confusing field names with values

The value 'active' must be a string with quotes. Without quotes, it is treated as a variable which causes an error.

4fill in blank

hard

Fill both blanks to delete one document where the city is 'Paris' and the age is 25.

MongoDB

db.collection('users').deleteOne({ [1]: [2], age: 25 })

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

Acity

B'Paris'

C'city'

DParis

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around keys incorrectly

Not quoting string values

The filter object needs the field name city without quotes as a key, and the value 'Paris' as a string with quotes.

5fill in blank

hard

Fill all three blanks to delete one document where the first name is 'John', last name is 'Doe', and active status is true.

MongoDB

db.collection('users').deleteOne({ firstName: [1], lastName: [2], active: [3] })

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

A'John'

B'Doe'

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around boolean values

Forgetting quotes around string values

String values like 'John' and 'Doe' need quotes. Boolean values like true are unquoted keywords.