MongoDB CRUD Operations Quiz

1. Which operator matches documents where a field exists?

$exists

$has

$present

$defined

2. True or False: The find() method immediately returns all matching documents as an array.

True

False

3. Which operator performs a logical NOT operation on a query expression?

$not

$nor

$negate

$inverse

Submit

5. What does the projection parameter in find() control?

Which fields to include or exclude in results

The order of returned documents

The number of documents returned

The filtering criteria

6. True or False: replaceOne() can replace an entire document with a new one.

True

False

7. Which operator matches documents where a field value is in a specified array?

$in

$contains

$includes

$within

Submit

9. What is the purpose of the $inc operator?

Increments a numeric field by a value

Inserts a new field

Includes a field in results

Increases document size

10. True or False: deleteMany() removes all documents from a collection if no filter is provided.

True

False

11. Which MongoDB method inserts a single document into a collection?

InsertOne()

Insert()

AddDocument()

Create()

Submit

13. Which method updates multiple documents matching a filter?

UpdateOne()

UpdateMany()

UpdateAll()

ReplaceMany()

14. What does the $set operator do in an update operation?

Replaces entire document

Sets or updates specific fields

Deletes specified fields

Increments field values

15. True or False: The findOne() method returns a cursor object.

True

False

16. Which operator is used to match documents where a field is greater than a value?

$gt

$greater

$above

$gte

Submit

18. What is the correct syntax for updateOne() with a replacement document?

Db.collection.updateOne(filter, {$set: newDoc})

Db.collection.updateOne(filter, newDoc)

Db.collection.update(filter, newDoc)

Db.collection.replace(filter, newDoc)

19. Which operator is used to match documents where a field equals a specific value?

$eq

$match

$equals

$is

20. What does the find() method return in MongoDB?

A single document matching the query

A cursor to iterate through matching documents

An array of all documents in the collection

The number of matching documents

MongoDB Developer CRUD Operations Quiz

1. Which operator matches documents where a field exists?

2.

What first name or nickname would you like us to use?

2. True or False: The find() method immediately returns all matching documents as an array.

3. Which operator performs a logical NOT operation on a query expression?

4. The $unset operator ____ specified fields from a document.

5. What does the projection parameter in find() control?

6. True or False: replaceOne() can replace an entire document with a new one.

7. Which operator matches documents where a field value is in a specified array?

8. The findOne() method returns the ____ matching document or null.

9. What is the purpose of the $inc operator?

10. True or False: deleteMany() removes all documents from a collection if no filter is provided.

11. Which MongoDB method inserts a single document into a collection?

12. The insertMany() method accepts an ____ of documents.

13. Which method updates multiple documents matching a filter?

14. What does the $set operator do in an update operation?

15. True or False: The findOne() method returns a cursor object.

16. Which operator is used to match documents where a field is greater than a value?

17. The deleteOne() method removes ____ matching document(s) from a collection.

18. What is the correct syntax for updateOne() with a replacement document?

19. Which operator is used to match documents where a field equals a specific value?

20. What does the find() method return in MongoDB?