Query Operators MCQ , MongoDB Query Operators Practice Questions

Direction: Choose the correct option

Which operator is used for equality comparison in MongoDB queries?

A. $gt

B. $in

C. $lt

D. $eq

Direction: Choose the correct option

How would you find documents where the 'age' field is greater than 18?

A. {age: 18}

B. {age: {$gte: 18}}

C. {age: {$gt: 18}}

D. {age: {$lt: 18}}

Direction: Choose the correct option

Which operator is used to match documents where a field value is in a specified array?

A. $elemMatch

B. $in

C. $nin

D. $all

Direction: Choose the correct option

What does the `$regex` operator allow you to do?

A. Validate email format

B. Perform pattern matching using regular expressions

C. Extract substrings

D. Replace text

Direction: Choose the correct option

How do you find documents where the 'tags' array contains both 'red' and 'blue'?

A. {tags: {$in: ['red', 'blue']}}

B. {tags: {$elemMatch: {$eq: 'red', $eq: 'blue'}}}

C. {tags: ['red', 'blue']}

D. {tags: {$all: ['red', 'blue']}}

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