$set operator for setting fields in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the field "age" to 30 in the update operation.

MongoDB

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

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

A25

B30

C35

D40

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string instead of a number for the age value.

Forgetting to use the $set operator.

The $set operator updates the value of the specified field. Here, we set age to 30.

2fill in blank

medium

Complete the code to set the "status" field to "active" for all matching documents.

MongoDB

db.users.updateMany({ subscribed: true }, { $set: { status: [1] } })

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

Afalse

Btrue

C"inactive"

D"active"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a boolean value instead of a string.

Omitting the quotes around the string value.

The $set operator updates the status field to the string "active" for all users who are subscribed.

3fill in blank

hard

Fix the error in the update command to correctly set the "score" field to 100.

MongoDB

db.players.updateOne({ name: "Bob" }, { $set: [1] })

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

A{ score: 100 }

B[ score: 100 ]

Cscore: 100

D"score: 100"

Attempts:

3 left

💡 Hint

Common Mistakes

Not using curly braces around the field and value.

Using square brackets or quotes incorrectly.

The $set operator requires an object with field-value pairs. So, { score: 100 } is correct.

4fill in blank

hard

Fill both blanks to set the "level" field to 5 and "active" field to true in one update.

MongoDB

db.accounts.updateOne({ user: "Eve" }, { $set: { [1]: [2], active: true } })

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

Alevel

B5

Cactive

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the value before the field name.

Using quotes incorrectly around numbers.

To set multiple fields, you list them inside the $set object. Here, the first blank is the field name level, and the second blank is its value 5.

5fill in blank

hard

Fill all three blanks to set "score" to 90, "level" to 3, and "active" to false in one update.

MongoDB

db.players.updateOne({ id: 123 }, { $set: { [1]: [2], [3]: 3, active: false } })

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

Ascore

B90

Clevel

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up field names and values.

Forgetting commas between fields.

The $set operator updates multiple fields by listing them inside the object. Here, score is set to 90, level is set to 3, and active is set to false.