Comparison expressions ($eq, $gt in aggregation) in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to match documents where the field 'score' equals 10.

MongoDB

{ $match: { score: { $[1]: 10 } } }

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

A$eq

B$ne

C$lt

D$gt

Attempts:

3 left

💡 Hint

Common Mistakes

Using $gt instead of $eq will match values greater than 10, not equal.

Using $ne will match values not equal to 10.

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

2fill in blank

medium

Complete the code to match documents where the field 'age' is greater than 25.

MongoDB

{ $match: { age: { $[1]: 25 } } }

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

A$lt

B$gt

C$eq

D$ne

Attempts:

3 left

💡 Hint

Common Mistakes

Using $eq will only match values equal to 25, not greater.

Using $lt will match values less than 25.

The $gt operator matches documents where the field value is greater than the specified value.

3fill in blank

hard

Fix the error in the code to correctly match documents where 'price' is greater than 100.

MongoDB

{ $match: { price: { $gt$[1] 100 } } }

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

A=

B,

C:

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using commas or equal signs instead of colon causes syntax errors.

In MongoDB queries, the operator and value must be separated by a colon :.

4fill in blank

hard

Fill both blanks to match documents where 'quantity' equals 5 and 'status' is greater than 2.

MongoDB

{ $match: { quantity: { $[1]: 5 }, status: { $[2]: 2 } } }

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

A$eq

B$gt

C$lt

D$ne

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the operators or using wrong ones like $lt or $ne.

$eq checks for equality and $gt checks for greater than.

5fill in blank

hard

Fill all three blanks to create a $match stage that finds documents where 'score' equals 90, 'age' is greater than 18, and 'level' equals 3.

MongoDB

{ $match: { score: { $[1]: 90 }, age: { $[2]: 18 }, level: { $[3]: 3 } } }

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

A$eq

B$gt

D$ne

Attempts:

3 left

💡 Hint

Common Mistakes

Using $ne instead of $eq or mixing up operators.

Use $eq for equality checks and $gt for greater than.