Delete with filter conditions in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

MongoDB

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

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

Ainactive

B"active"

C"inactive"

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the string value.

Using the field name as the value.

The filter must match documents where the "status" field is the string "inactive". So the value must be a string in quotes.

2fill in blank

medium

Complete the code to delete a single document where the "username" is "guest".

MongoDB

db.collection.[1]({"username": "guest"})

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

AdeleteOne

Bremove

CdeleteMany

Ddrop

Attempts:

3 left

💡 Hint

Common Mistakes

Using deleteMany which deletes multiple documents.

Using drop which deletes the whole collection.

To delete a single document matching a filter, use deleteOne. deleteMany deletes all matching documents.

3fill in blank

hard

Fix the error in the code to delete documents where "age" is greater than 30.

MongoDB

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

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

A$lt:

B$gt:

C>

D$gte:

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of $gt.

Omitting the colon after the operator.

MongoDB uses query operators like $gt for 'greater than'. It must be a key in an object, so the colon is needed.

4fill in blank

hard

Fill both blanks to delete documents where "score" is less than 50 and "passed" is false.

MongoDB

db.collection.deleteMany({"score": [1] 50, "passed": [2])

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

A$lt:

Bfalse

Ctrue

D$gt:

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of < for score.

Using string "false" instead of boolean false.

Use $lt for 'less than' and the boolean false for the "passed" field.

5fill in blank

hard

Fill all three blanks to delete documents where "category" is "electronics", "price" is greater than 100, and "inStock" is true.

MongoDB

db.collection.deleteMany({"category": [1], "price": [2] 100, "inStock": [3])

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

A"electronics"

B$gt:

Ctrue

D"clothing"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around "electronics".

Using > instead of $gt.

Using string "true" instead of boolean true.

The category is the string "electronics" (with quotes), the price filter uses $gt for 'greater than', and inStock is the boolean true.