MongoDB Fundamentals Quiz Quiz

1. Question 1

   Which data structure does MongoDB use to store records, such as {'name':'John', 'age':30}?

   1. Dataset
   2. Document
   3. Tuple
   4. Rowment
   5. Table

2. Question 2

   What is the primary advantage of using MongoDB over traditional relational databases for rapidly changing data?

   1. Strict schemas
   2. Flexible documents
   3. Fixed tables
   4. Limited scalability
   5. Slow updates

3. Question 3

   Which of the following is the mandatory unique identifier field in every MongoDB document by default?

   1. docID
   2. mainID
   3. objectNum
   4. _id
   5. row_key

4. Question 4

   To create a collection called 'students' in an existing MongoDB database, which command should you use?

   1. db.buildCollection('students')
   2. db.addCollection('students')
   3. db.createCollection('students')
   4. db.newCollection('students')
   5. db.createTable('students')

5. Question 5

   If you want to insert a single document into a collection named 'products', which method would you typically use?

   1. db.products.inputOne()
   2. db.products.addOne()
   3. db.products.insertItem()
   4. db.products.insertOne()
   5. db.products.putDocument()

6. Question 6

   Which data type is NOT natively supported by MongoDB documents?

   1. Array
   2. Date
   3. String
   4. Boolean
   5. Bitmap

7. Question 7

   When searching for documents where the 'score' field is greater than 80, which MongoDB operator should you use?

   1. $lte
   2. $lt
   3. $gte
   4. $gt
   5. $not

8. Question 8

   What is the purpose of creating an index on a MongoDB collection?

   1. To improve query performance
   2. To join documents
   3. To decrease storage size
   4. To store more data
   5. To remove duplicates

9. Question 9

   Capped collections in MongoDB are most suitable for which use case?

   1. Permanent archives
   2. Configuration settings
   3. Transactional logs
   4. Hierarchy trees
   5. Analytical reports

10. Question 10

    In MongoDB, which operation would you use to delete multiple documents that match a certain filter?

    1. db.collection.removeAll()
    2. db.collection.deleteAny()
    3. db.collection.deleteMany()
    4. db.collection.removeOne()
    5. db.collection.eraseAll()