MongoDB Data Insertion Techniques: Beginner-Level Quiz

MongoDB Data Insertion Techniques Quiz

This quiz tests your knowledge of MongoDB’s data insertion methods, including single and batch inserts, bulk operations, unique constraints, write concerns and upserts. You'll also explore how MongoDB handles errors, schema validation, and auto-generated fields like _id. Get ready to assess your skills and deepen your understanding! Good luck!

1 / 20

What will happen if you attempt to insert a document with a field that violates the unique index constraint?

The document will be inserted, and the unique index will be removed

The document will be inserted without the conflicting field

The insertion will fail, and MongoDB will return a duplicate key error

MongoDB will insert the document but warn about the violation

2 / 20

Which of the following fields is auto-generated by MongoDB if not provided during insertion?

primary_key

timestamp

_id

object_key

3 / 20

MongoDB allows inserting documents with circular references within embedded documents. True or False?

True

False

4 / 20

Which of the following describes the difference between ordered and unordered inserts in insertMany()?

There is no difference between the two

Ordered means documents must be identical; unordered allows variations

Ordered inserts stop on the first error, while unordered inserts continue

Ordered inserts are faster than unordered inserts

5 / 20

What will happen if you attempt to insert a document with a null value for a required field?

The document will be inserted, but the null value will be ignored

The insert will fail, throwing a validation error

MongoDB will automatically replace null with an empty string

The insert will succeed, and the value will be stored as null

6 / 20

Which of the following is TRUE about insertMany()?

All documents must have the same structure

It does not support inserting multiple documents at once

It can insert multiple documents but will stop at the first error unless ordered: false is used

It only works when the collection is empty

7 / 20

What is the default writeConcern setting in MongoDB?

Acknowledgment from all replica nodes

No acknowledgment needed

Acknowledgment from the primary node only

Acknowledgment from two secondary nodes

8 / 20

Which of the following is true about the insert() method?

It automatically generates _id for all documents

It requires the _id field to be specified for each document

It can only insert one document at a time

It can insert either one or multiple documents

9 / 20

What happens if you attempt to insert a document into a collection that doesn’t exist?

The database will be deleted

The insert will fail because the collection doesn’t exist

MongoDB will generate a warning and ask for confirmation

MongoDB will create the collection automatically and insert the document

10 / 20

How does MongoDB handle duplicate keys when inserting documents with unique indexes?

MongoDB will modify the duplicate key automatically

MongoDB will store the document with a warning

It will overwrite the existing document

The insertion will fail with a duplicate key error

11 / 20

Using bulkWrite(), you can mix inserts, updates, and deletes within the same operation. True or False?

True

False

12 / 20

What does the ordered: true option do in insertMany()?

Ignores duplicate documents

Makes all inserted documents identical

Ensures the collection remains locked during insertion

Stops the insertion at the first error

13 / 20

Which of the following is a valid reason for using bulkWrite() instead of insertMany()?

When you need to mix inserts, updates, and deletes in a single operation

When working with read-only collections

When you need a faster way to insert a single document

When you want to enforce schema validation strictly

14 / 20

What is the purpose of the writeConcern option during document insertion?

To automatically retry failed insert operations

To ensure the document is inserted without any constraints

To specify the level of acknowledgment requested from MongoDB for write operations

To control the transaction duration during insertion

15 / 20

What is the result if you perform an insert without explicitly defining a database and collection?

MongoDB will auto-create both the database and collection

MongoDB will throw an error indicating a missing database or collection

The document will be inserted into the default collection

The document will be inserted without validation

16 / 20

If you try to insert a document with a duplicate value for the _id field, what will happen?

An error will be thrown, and the insert will fail

The new document will replace the existing document

The duplicate value will be modified automatically

The existing document will be ignored

17 / 20

Inserting documents using the command insertMany() is generally faster than inserting them one by one using insertOne(). True or False?

True

False

18 / 20

How can you ensure that a large batch insert operation continues even if some documents cause errors?

Set ordered: false in insertMany()

Use retryWrites: true

Use db.collection.insertSingle()

Use bulkInsert() method

19 / 20

The writeConcern option during insertion ensures that the operation is acknowledged only by the primary node in a replica set. True or False?

True

False

20 / 20

How can you insert a document with default values for unspecified fields?

You cannot set default values in MongoDB

By using a schema validation to set default values

By modifying the document after insertion

By using db.collection.insert({ field1: "value" }), default values will be set automatically

Your score is

The average score is 0%

MongoDB Data Insertion Techniques covers the various methods that can be used to insert data into MongoDB collections.

This includes understanding how to insert single documents using the insertOne() method, inserting multiple documents with insertMany(), and bulk operations for more efficient data insertion.

This quiz is essential for beginners working with MongoDB to efficiently add data to collections, especially in high-volume or production environments.

All the best!