String and number types in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to insert a document with a string field named 'name'.

MongoDB

db.users.insertOne({ name: [1] })

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

A"Alice"

B123

Ctrue

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number without quotes for a string field.

Using boolean or null instead of a string.

The 'name' field should be a string, so it must be enclosed in quotes.

2fill in blank

medium

Complete the code to find documents where the 'age' field is a number equal to 30.

MongoDB

db.users.find({ age: [1] })

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

A30

Btrue

Cnull

D"30"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string "30" instead of number 30.

Using boolean or null values.

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

3fill in blank

hard

Fix the error in the query to find users with a string 'status' equal to 'active'.

MongoDB

db.users.find({ status: [1] })

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

Atrue

Bnull

C"active"

Dactive

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving out quotes around string values.

Using boolean or null instead of string.

String values must be enclosed in quotes in MongoDB queries.

4fill in blank

hard

Fill both blanks to create a document with a string 'title' and a number 'pages'.

MongoDB

db.books.insertOne({ title: [1], pages: [2] })

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

A"MongoDB Guide"

Btrue

C250

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the string value for title.

Quoting the number value for pages.

The 'title' is a string and must be quoted. The 'pages' is a number and should not be quoted.

5fill in blank

hard

Fill all three blanks to find documents where 'author' is a string, 'year' is a number greater than 2000, and 'available' is a boolean true.

MongoDB

db.books.find({ author: [1], year: { $gt: [2] }, available: [3] })

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

A"John Doe"

B2000

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the string author.

Quoting the number year.

Using false instead of true for available.

The 'author' is a string and needs quotes. The 'year' is a number and should be without quotes. The 'available' is a boolean true.