deleteMany method in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to delete all documents where the field "status" is "inactive".

MongoDB

db.collection.deleteMany({ status: [1] })

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

Anull

B"active"

Ctrue

D"inactive"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around string values.

Using deleteOne instead of deleteMany.

The deleteMany method deletes all documents matching the filter. Here, we want to delete documents where status equals "inactive".

2fill in blank

medium

Complete the code to delete all documents where the "age" field is greater than 30.

MongoDB

db.collection.deleteMany({ age: { [1]: 30 } })

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

A$lt

B$eq

C$gt

D$ne

Attempts:

3 left

💡 Hint

Common Mistakes

Using $lt which means less than.

Using $eq which means equal.

The $gt operator means "greater than". This filter deletes documents where age is greater than 30.

3fill in blank

hard

Fix the error in the code to delete documents where "score" is less than or equal to 50.

MongoDB

db.collection.deleteMany({ score: { [1]: 50 } })

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

A$lte

B$gte

C$gt

D$eq

Attempts:

3 left

💡 Hint

Common Mistakes

Using $gte which means greater than or equal.

Using $eq which means equal only.

The operator $lte means "less than or equal to". It correctly filters documents with score less than or equal to 50.

4fill in blank

hard

Fill both blanks to delete documents where "category" is "books" and "price" is less than 20.

MongoDB

db.collection.deleteMany({ category: [1], price: { [2]: 20 } })

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

A"books"

B"electronics"

C$lt

D$gt

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong category string.

Using $gt instead of $lt.

The filter deletes documents with category equal to "books" and price less than 20 using $lt.

5fill in blank

hard

Fill all three blanks to delete documents where "status" is "pending", "priority" is greater than 3, and "assigned" is false.

MongoDB

db.collection.deleteMany({ status: [1], priority: { [2]: 3 }, assigned: [3] })

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

A"pending"

B$gt

Cfalse

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using true instead of false for assigned.

Forgetting quotes around "pending".

Using wrong operator for priority.

This filter deletes documents where status is "pending", priority is greater than 3 using $gt, and assigned is false.