find method basics in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to find all documents in the collection.

MongoDB

db.collection.[1]()

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

Ainsert

Bupdate

Cfind

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using insert() instead of find().

Using update() or delete() which modify data.

The find() method retrieves documents from a MongoDB collection.

2fill in blank

medium

Complete the code to find documents where the field 'age' is 25.

MongoDB

db.collection.find([1]: 25})

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

Astatus

Bage

Cscore

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong field name in the query.

Not using an object inside find().

To filter documents by age, use {age: 25} inside find().

3fill in blank

hard

Fix the error in the code to find documents with 'status' equal to 'active'.

MongoDB

db.collection.find({status: [1])

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A'active'

Bactive"

Cactive

D"active"

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting string values.

Using mismatched or missing quotes.

String values in MongoDB queries must be quoted with double or single quotes. Here, double quotes are correct.

4fill in blank

hard

Fill both blanks to find documents where 'score' is greater than 80.

MongoDB

db.collection.find({score: { [1]: [2] }})

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

A$gt

B$lt

C80

D100

Attempts:

3 left

💡 Hint

Common Mistakes

Using $lt which means 'less than'.

Using wrong comparison values.

The operator $gt means 'greater than'. So {score: {$gt: 80}} finds scores above 80.

5fill in blank

hard

Fill all three blanks to find documents where 'age' is less than 30 and only show the 'name' field.

MongoDB

db.collection.find([1]: { [2]: [3] }}, {name: 1})

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

Aage

B$lt

C30

D$gt

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong operators like $gt.

Not specifying the projection correctly.

Use {age: {$lt: 30}} to find ages less than 30. The second argument {name: 1} shows only the 'name' field.