$eq for equality in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to find documents where the field "age" equals 25.

MongoDB

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

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

A$ne

B$eq

C$lt

D$gt

Attempts:

3 left

💡 Hint

Common Mistakes

Using $gt or $lt which check greater or less than, not equality.

Using $ne which means not equal.

The $eq operator checks if the field value is equal to the specified value.

2fill in blank

medium

Complete the code to find documents where the "status" field equals "active".

MongoDB

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

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

A$eq

B$ne

C$in

D$exists

Attempts:

3 left

💡 Hint

Common Mistakes

Using $ne which means not equal.

Using $in which checks if value is in an array.

The $eq operator matches documents where the field equals the given value.

3fill in blank

hard

Fix the error in the query to find documents where "score" equals 100.

MongoDB

db.collection.find({ "score": { [1]: 100 } })

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

A$eq

B$gt

C$eq:

D$ne

Attempts:

3 left

💡 Hint

Common Mistakes

Including the colon inside the blank causing syntax errors.

Using $gt which means greater than.

The correct syntax is $eq followed by a colon and the value, so $eq: 100. Here the colon is outside the blank, so only $eq is needed.

4fill in blank

hard

Fill both blanks to find documents where "category" equals "books" and "price" equals 20.

MongoDB

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

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

A$eq

B$ne

C$gt

D$lt

Attempts:

3 left

💡 Hint

Common Mistakes

Using $ne or $gt which do not check for equality.

Mixing different operators for the two fields.

Both fields use $eq to check for equality with the given values.

5fill in blank

hard

Fill all three blanks to find documents where "type" equals "fruit", "color" equals "red", and "quantity" equals 10.

MongoDB

db.collection.find({ "type": { [1]: "fruit" }, "color": { [2]: "red" }, "quantity": { [3]: 10 } })

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

A$ne

B$eq

C$exists

D$in

Attempts:

3 left

💡 Hint

Common Mistakes

Using $ne which means not equal.

Using $exists or $in which check for existence or membership, not equality.

All three fields use $eq to check for equality with their respective values.