nosql

from collection employee, please get records where gender male or age is 25 a. .........{ $and: [ { "gender" : "male" }, { "age" : 25 } ] } b. .........{ $or: [ { "gender" : "male" }, { "age" : 25 } ] } c. .........{ { "gender" : "male" }, { "age" : 25 } } d. .........{ $in: [ { "gender" : "male" }, { "age" : 25 } ]

.........{ $or: [ { "gender" : "male" }, { "age" : 25 } ] }

4. MongoDB documents of a similar type are grouped into _______________. A collection A cluster An index A replica set

A collection

Which of the following describes MongoDB Compass? (Select one.) A. A Node.js REPL environment that is used to interact with the database B. A data visualization tool that allows you to create and embed visualizations in your application C. A tool that allows you to query, transform, and move data across Amazon S3 and Atlas clusters D. A graphical user interface (GUI) for querying, aggregating, and analyzing data in MongoDB

A graphical user interface (GUI) for querying, aggregating, and analyzing data in MongoDB

Which of the following are data types that are supported by MongoDB by using BSON? (Select all that apply.) A. 32-bit integer B. Object C. Array D. ObjectId E. _id F. All of the above.

A. 32-bit integer B. Object C. Array D. ObjectId

Visit the official MongoDB driver documentation. Which of the following languages have drivers that are supported by MongoDB? (Select all that apply.) A. C# B. Go C. Node D. Pascal

A. C# B. Go C. Node

Which of the pre-formatted connection strings are available in the Atlas dashboard? (Select all that apply.) A. Connect with the MongoDB Shell B. Connect your application C. Connect using MongoDB Compass D. Connect with MongoDB Charts

A. Connect with the MongoDB Shell B. Connect your application C. Connect using MongoDB Compass

Which of the following is something that you can do with MongoDB Atlas? (Select all that apply.) A. Store your data with MongoDB's multi-cloud, global service. B. Add search functionality to your application, like a search bar. C. Write and host a full application in a managed cloud environment. D. Query across multiple Atlas clusters to get a holistic view of your data. E. None of the above.

A. Store your data with MongoDB's multi-cloud, global service. B. Add search functionality to your application, like a search bar. C. Write and host a full application in a managed cloud environment. D. Query across multiple Atlas clusters to get a holistic view of your data.

1. Working with MongoDB is easy because ____________ It allows you to share data in a relational way only. You need to first create the schema and the table structures that will hold your data. It allows you to focus on what data you are writing and how you are going to read it. You need to alter your tables if you decide to store an additional field.

It allows you to focus on what data you are writing and how you are going to read it.

5. Which of the following are use cases in which you should model your data for performance rather than simplicity? (Select all that apply.) It is expected that the solution will be designed with only 10 shards. The application is being developed by 100 engineers. There is not an applicable design pattern to the solution.

It is expected that the solution will be designed with only 10 shards. The application is being developed by 100 engineers.

10. The "Many Sources One View" use case of MongoDB suggests that __________ MongoDB can ingest different types of data from different sources and consolidate it into one view for all data. MongoDB can store data that is of different types and formats. MongoDB can collect vast amounts of data. MongoDB can store data collected from multiple sources as long as they are the same format.

MongoDB can ingest different types of data from different sources and consolidate it into one view for all data.

2. Which of the following statements are true about MongoDB documents? (Select all that apply.) (Select all that apply.) MongoDB documents have a flexible schema. MongoDB documents are stored as BSON documents. MongoDB documents within a collection must have the same fields.

MongoDB documents have a flexible schema. MongoDB documents are stored as BSON documents.

7. MongoDB is schemaless. What does that mean? That you can only store structured data in MongoDB. MongoDB does not require that you create the schema and the table structures before writing the data. The schema is already created, so all you need to do is to create the table structures that will hold your data. With MongoDB, you don't need to alter your tables to store additional fields.

MongoDB does not require that you create the schema and the table structures before writing the data.

1. Which of the following statements are true about data modeling using MongoDB? (Select one.) MongoDB will help you iterate on the schema designs of your models throughout your application's lifecycle. MongoDB is schema-less so you should not worry about designing a schema for your models. MongoDB should only be used for unstructured datasets. верно

MongoDB will help you iterate on the schema designs of your models throughout your application's lifecycle.

Database names can contain any of the following characters:/\. "$*<>:|? a. I do not know b. Why not c. No d. Yes

No

'NoSQL' stands for ______ a. Name Object SQL b. Ne Ol SQL c. No SQL d. Not only SQL

Not only SQL

3. Which of the following is not a usual constraint that would impact your data model for MongoDB? (Select one.) Operating System Disk Drives RAM Security Network

Operating System

You have an Atlas cluster and need to grant specific users access to specific projects. Where can you do this in Atlas? (Select one.) A. Projects B. Organizations C. IP Access List

Organizations

Open MongoDB Compass on your computer. From the following list, select all of the tabs that appear in the Compass UI: (Select all that apply.) A. Clusters B. My Queries C. Performance D. Databases Hint Make sure that your username and password are correctly filled out.

Performance Databases My Queries

9. Typical MongoDB setups are a three-node replica set. The ________________ process keeps a copy of your data on the primary node on the other data bearing nodes in the cluster. Clustering Redundancy Aggregation Replication

Replication

6. ___________ provided by MongoDB means as your data needs grow, you can introduce bigger, faster, and better hardware, and partition your data. Flexibility High availability Self-management Scalability

Scalability

Using the Atlas Data Explorer, how can you add a collection to an existing database? (Select one.) A. Select the database, then click the Create Collection button B. Select the Create Database button C. You cannot add a collection to an existing database in Atlas Data Explorer, you must use the terminal.

Select the database, then click the Create Collection button

8. True or False: MongoDB follows a code-first approach, which means you can start writing your data as soon as you connect to the database. FALSE TRUE

TRUE

What is the relationship between the MongoDB database and MongoDB Atlas? (Select one.) A. The MongoDB database is the locally deployed version of MongoDB Atlas. B. The MongoDB database is a core element of MongoDB Atlas, which is a multi-cloud developer data platform. C. The MongoDB database is the free version of MongoDB Atlas.

The MongoDB database is a core element of MongoDB Atlas, which is a multi-cloud developer data platform.

The following query will return only documents where the genre field is equal to a scalar value of Historical: db.books.find({ genre: "Historical" }) Select one: True False

The correct answer is 'False'.

There is no command to create new DataBase. Database will be created together with first collection. Select one: True False

The correct answer is 'True'.

What does $elemMacth operator? { <arrayField>: { $elemMatch: { <condition1> , <condition2> , ...}} } a. Any nested document in the Array must match all conditions. Order of conditions doesn't matter b. At least one nested document in the Array must match all conditions. Order of conditions doesn't matter c. At least two or more nested document in the Array must match any conditions. Order of conditions doesn't matter d. At least one nested document in the Array must match any conditions. Order of conditions doesn't matter

The correct answer is: At least one nested document in the Array must match all conditions. Order of conditions doesn't matter

Which command shows active DataBase a. show dis b. get current c. show <database name> d. db

The correct answer is: db

Limit, Skip and Sort precedence in Mongo a. limit -> sort -> skip b. skip -> sort -> limit c. limit -> skip -> sort d. sort -> skip -> limit

The correct answer is: sort -> skip -> limit

In the sample_training db - trips collection a person with birth year 1961 took a trip that started at "Howard St & Centre St". What was the end station name for that trip? Copy and paste your answer from the Atlas UI to the response text box. The station name should be in a single set double quotes, exactly as it is in the Data Explorer.

The correct answer is: "South End Ave & Liberty St"

In the sample_training.trips collection a person with birth year 1961 took a trip that started at "Howard St & Centre St". What was the end station name for that trip? Copy and paste your answer from the Atlas UI to the response text box. The station name should be in a single set double quotes, exactly as it is in the Data Explorer.

The correct answer is: "South End Ave & Liberty St"

Which query operator will compare values and return all that are greater than? : a.$lt b.$ne c.$eq d.$gt

The correct answer is: $gt

Which operator we use to select documents where the value of a field equals any value in the specified array? a.$sum b.$nor c.$in d.$or e.$count

The correct answer is: $in

Using which operator we can access the query field of documents within a system profile?: a.$query b.$push c.$select d.$retrieve

The correct answer is: $query

MongoDB documents of a similar type are grouped into _______________. a.A replica set b.An index c.A collection d.A cluster

The correct answer is: A collection

Which use case would be a poor choice for a document type NoSQL database? a.Aggregate-oriented design b.Event logging for a process c.Operational data sets for a web app d.Online blogging

The correct answer is: Aggregate-oriented design

What statement is true with regard to the localhost exception? a.You need to use the mongod user to create additional users when connecting to a mongod for the first time. b.Any user logging on from localhost bypasses authentication. c.You can create the first user when connecting to a newly configured mongod from localhost. d.Localhost connections are blacklisted by default.

The correct answer is: Any user logging on from localhost bypasses authentication.

How is data stored in a MongoDB database? a.Data is stored in key-value pairs b.Data is stored in tables c.Data is stored in documents d.Data is stored in rows and columns

The correct answer is: Data is stored in documents

In MongoDB, write operations are atomic at the __________ level : a.Collection b.all of the mentioned c.Row d.Document

The correct answer is: Document

Which category of NoSQL databases is it recommended not to shard data on? a.Document-based NoSQL databases b.Key-Value NoSQL databases c.Graph NoSQL databases d.Column-based NoSQL databases

The correct answer is: Graph NoSQL databases

Which of the following is not part of the first phase of the data modeling methodology? (Select one.) a.Listing the read operations. b.Identifying the relationships between the units of data. c.Quantifying each of the operations in terms of latency and frequency. d.Listing the write operations. e.Identifying the durability of each write operation.

The correct answer is: Identifying the relationships between the units of data.

What does "it" do in the mongo shell? a.Interferes with the task b.Warns about imminent termination c.it is not a mongo shell command d.Iterates through the cursor results

The correct answer is: Iterates through the cursor results

MongoDB uses... : a.MySQL b.NoSQL c.SQL d.SQLite

The correct answer is: NoSQL

Which of the following is not a usual constraint that would impact your data model for MongoDB? (Select one.) a.Operating System b.Disk Drives c.RAM d.Security e.Network

The correct answer is: Operating System

Normalized data models describe relationships using ___________ between documents: a.Relativeness b.No one c.Evaluation d.References

The correct answer is: References

What is a characteristic of column-based NoSQL databases? a.Rows in column families are required to share the same columns. b.Columns are grouped together in families because they are often accessed individually. c.Rows in column families share a common key or identifier. d.Rows in column families can share all, a subset, or none of the columns.

The correct answer is: Rows in column families can share all, a subset, or none of the columns.

True or False: MongoDB can ingest multiple shapes and formats of data from different sources. a.True b.False

The correct answer is: True

You are attempting to run a mongod with the following options in your terminal. Assume the directory paths and permissions are correctly set. The mongod is not starting. mongod --port 35000 --dbpath /home/user/mongodb/data --fork What is the cause? a.the directory /home/user/mongodb/data is empty b.`--logpath` is not specified c.`--bind_ip_all` is not specified d.the port must be 27017

The correct answer is: `--logpath` is not specified

Write a command to add a new entry to the "articles" collection.The record should consist of the following properties: name: "New entry", author: "Admin", views: 50, anons: "Announcement text" P S: Do not change the order of adding data.

The correct answer is: db.articles.insertOne({ name: "New entry", author: "Admin", views: 50, anons: "Announcement text"});

Where is the collection created correctly? : a.db.createCollection("some") b.db.collection("some") c.db.create("some") d.db.createCollections(some)

The correct answer is: db.createCollection("some")

Write the command to delete the "items" collection.

The correct answer is: db.items.drop()

Write command to delete all data from "rest" collection

The correct answer is: db.rest.remove({});

The MongoDB collection consists of ...: a.documents b.folders c.files d.images

The correct answer is: documents

What is MongoDB? : a.it is a database management system b.it is a programming language c.this is a relational database d.this is a console program

The correct answer is: it is a database management system

Which of the following commands will add a collection that is stored in animals.json to an Atlas cluster? a.mongoexport b.mongorestore c.mongodump d.mongoimport

The correct answer is: mongoimport

What component acts as an interface between a client application and sharded cluster in MongoDB? a.primary shard b.mongos c.mongod d.config servers

The correct answer is: mongos

What method is used to select a database in MongoDB? : a.create b.collection c.use d.drop

The correct answer is: use

Which of the following not comparison operators a. $lt b. $neq c. $leq d. $gt

The correct answers are: $leq, $neq

Which of the following are logical operators in MongoDB? Select all that apply. a.$or b.&why c.$&& d.$and

The correct answers are: $and, $or

What is the good alternatives to MongoDB? :(select two) a.Yandex drive b.Cassandra c.Redis and CouchDB d.Google Colab

The correct answers are: Cassandra, Redis and CouchDB

In a MongoDB Document what is the role of fields and values?Check all answers that apply: a.Each field has a value associated with it. b.A field is a unique identifier for a specific datapoint. c.Values do not have to be attached to fields, and can be stand alone data points.

The correct answers are: Each field has a value associated with it., A field is a unique identifier for a specific datapoint.

Consider a one-to-many relationship observed between a county and the cities in that county. Which of the following are valid ways to represent this one-to-many relationship with the document model in MongoDB? (Select all that apply.) a.Have a collection for the counties and a collection for the cities with each city document having a field to reference the document of its county. b.Embed the entities for the cities as an array of sub-documents in the corresponding county document. c.Embed all the fields for a city as a subdocument in the corresponding county document.

The correct answers are: Embed the entities for the cities as an array of sub-documents in the corresponding county document., Have a collection for the counties and a collection for the cities with each city document having a field to reference the document of its county.

Which of the following phases are included in our data modeling methodology for MongoDB? (Select all that apply.) a.Identifying the relationships between pieces of information. b.Identifying the workload of the system. c.Applying schema design patterns.

The correct answers are: Identifying the relationships between pieces of information., Identifying the workload of the system., Applying schema design patterns.

Which of the following statements are true about the mongo shell? a.It is a fully functioning JavaScript interpreter b.It allows you to interact with your MongoDB instance without using a Graphical User Interface c.mongo shell automatically returns an ordered list of results

The correct answers are: It allows you to interact with your MongoDB instance without using a Graphical User Interface, It is a fully functioning JavaScript interpreter

Which of the following are use cases in which you should model your data for performance rather than simplicity? (Select all that apply.) a.There is not an applicable design pattern to the solution. b.It is expected that the solution will be designed with only 10 shards. c.The application is being developed by 100 engineers.

The correct answers are: It is expected that the solution will be designed with only 10 shards., The application is being developed by 100 engineers.

Which of the following statements are true about MongoDB documents? (Select all that apply.) a.MongoDB documents have a flexible schema. b.MongoDB documents within a collection must have the same fields. c.MongoDB documents are stored as BSON documents.

The correct answers are: MongoDB documents have a flexible schema., MongoDB documents are stored as BSON documents.

Select the statements that together help build the most complete definition of the MongoDB database: Check all answers that apply: a.MongoDB database organizes documents in rows and columns. b.The MongoDB database is an organized way to store and access data. c.MongoDB is a NoSQL database that uses documents to store data in an organized way. d.MongoDB's database uses tables of related data.

The correct answers are: The MongoDB database is an organized way to store and access data., MongoDB is a NoSQL database that uses documents to store data in an organized way.

Why did we introduce the one-to-zillions relationship in our modeling notation? (Select all that apply.) a.To highlight the fact that huge cardinalities may impact design choices. b.To graphically represent a relationship that has a higher order of magnitude than commonly seen in a 'one-to-many' relationship. c.To address the fact that a crow's foot has 5 fingers, not 3.

The correct answers are: To highlight the fact that huge cardinalities may impact design choices., To graphically represent a relationship that has a higher order of magnitude than commonly seen in a 'one-to-many' relationship.

How does the value of _id get assigned to a document? Check all answers that apply: a.It is automatically generated as an ObjectId type value. b.When a document is inserted a random field is picked to serve as the _id field. c.You can select a non ObjectId type value when inserting a new document, as long as that value is unique to this collection. d._id field values are sequential integer values.

The correct answers are: You can select a non ObjectId type value when inserting a new document, as long as that value is unique to this collection., It is automatically generated as an ObjectId type value.

Structure of collection documents :(select two) a.must be the same b.can be different c.can be the same d.must be different

The correct answers are: can be the same, can be different

The Collections screen displays ___ for each collection in the selected database :(select two) a.none of the mentioned above b.number of documents in the collection c.collection name

The correct answers are: collection name, number of documents in the collection

3. What does it mean when we say that MongoDB follows a code-first approach? It allows you to use third-party frameworks to give you read and write operations. You can store unstructured data. There are no complex table definitions so you can start writing your first data as soon as you connect to your MongoDB database. You're ready to work on your database as soon as your table design is created.

There are no complex table definitions so you can start writing your first data as soon as you connect to your MongoDB database.

5. True or False: MongoDB can ingest multiple shapes and formats of data from different sources. True False

True

Consider the following query: db.toys.find({ "price": { "$gt": 20, "$lt": 100 }}) What document is returned by this query? a. { "name": "toy truck", "price": 50 } b. { "name": "lego", "price": 100 } c. { "name": "yo-yo", "price": 18 } d. { "name": "dreidel", "price": 20 }

Your answer is correct. The correct answer is: { "name": "toy truck", "price": 50 }

Consider the following query: db.groceries.find({ type: "produce" }) What document is returned by this query? a. { name: "cauliflower", type: "vegetable", USD_per_pound: 5 } b. { name: "cabbage", type: "Produce", USD_per_pound: 3 } c. { name: "celery", type: "produce", USD_per_pound: 1.5 } d. { name: "asparagus", type: "fungus", USD_per_pound: 5 }

Your answer is correct. The correct answer is: { name: "celery", type: "produce", USD_per_pound: 1.5 }

Which of the following are valid ways to represent a one-to-one relationship with the document model in MongoDB? (Select all that apply.) a.Link to a single document in another collection. b. Embed the fields as a sub-document in the document. c. Embed the fields in the document.

Your answer is correct. The correct answers are: Embed the fields in the document., Embed the fields as a sub-document in the document., Link to a single document in another collection.

Consider a many-to-many relationship observed between movies and the actors starring in these movies, for a system that could provide detailed information about either a movie or an actor. Which of the following are true about modeling this many-to-many relationship with the document model in MongoDB? (Select all that apply.) When using one collection for movies and one collection for actors, all movie documents must have an array of references to the actors in that movie, and all actor documents must have an array of references to the movies they appear in. b. Embedding actors in movies still requires a separate collection to store all actors. c. Embedding actors in movies creates duplication of actor information.

Your answer is correct. The correct answers are: Embedding actors in movies still requires a separate collection to store all actors., Embedding actors in movies creates duplication of actor information.

documents capture relationships between data by storing related data in a single document structure: a.External b.Capped c.Embedded d.Internal

c.Embedded

What may be the most common reason to use a NoSQL database? a.Security b.Consistency c.Availability d.Scalability

d.Scalability

SELECT * FROM inventory WHERE status in ("A", "D") Corresponds to the following NoSQL statement: a. db.inventory.get( { status: { $in: [ "A", "D" ] } } ) b. db.inventory.find( { status: { in: [ "A", "D" ] } } ) c. db.inventory.find( { status: { in: "A", "D" } } ) d. db.inventory.find( { status: { $in: [ "A", "D" ] } } )

db.inventory.find( { status: { $in: [ "A", "D" ] } } )

Which of the following are types of data Compass (and MongoDB) recognizes and specifically supports? documents arrays geospatial data rainfall air pressure

documents arrays geospatial data

A query may include a _________ that specifies the fields from matching documents to return a. none of the answers b. selection c. union d. projection e. onion

projection

Which of the following documents is correct JSON? a. {"name" : "Devi", "age": 19, "major": "Computer Science"} b. {name : "Devi", age: 19, major: "Computer Science"} c. ["name" : "Devi", "age": 19, "major": "Computer Science"]

{"name" : "Devi", "age": 19, "major": "Computer Science"}

Use the following documents labeled Document A and Document B to answer this question. Elena's company has been storing customer data in records that are structured like Document A. Her company wants to add a new field to their customer records so that they are structured like Document B. Before inserting records like Document B, Elena and her team must update all older records to include the new field. Document A { "username": "vreddy", "name": "Vasanti Reddy", "email": "[email protected]", "location": { "city": "Delhi", "country": "India" } } Document B { "username": "avasa", "name": "Asad Vasa", "email": "[email protected]", "social_media": { "Twitter": "avasa", "Instagram": "Asad101", "LinkedIn": "AsadVasa" }, "location": { "city": "Los Angeles", "country": "United States" } } A.True B.False

False

Which of statements below best describes the following filter? {"age": {"$gte": 21, "$lt": 70}} Find all documents for which the age field has a value that is >= 21 and <= 70. Find all documents for which the age field has a value that is either equal to 21 or equal to 70. Find all documents for which the age field has a value that is >= 21 and < 70. Find all documents for which the age field is < 70. None of the above.

Find all documents for which the age field has a value that is >= 21 and < 70.

4. Which of the following phases are included in our data modeling methodology for MongoDB? (Select all that apply.) Identifying the relationships between pieces of information. Identifying the workload of the system. Applying schema design patterns.

Identifying the relationships between pieces of information. Identifying the workload of the system. Applying schema design patterns.

What does a MongoDB driver do? (Select one.) A. Executes an aggregation pipeline B. Connects MongoDB to applications via programming languages C. Controls replication and sharding across servers D. Creates different types of charts of our data

Connects MongoDB to applications via programming languages

2. How is data stored in a MongoDB database? Data is stored in documents Data is stored in tables Data is stored in key-value pairs Data is stored in rows and columns

Data is stored in documents

According to the JSON spec, which of the following data types are directly supported by JSON? String Array Object Boolean values (true and false) Floating-point number Null Pointer Date Graph Decimal number

Decimal number String Array Object Boolean values (true and false) Floating-point number Null

Jenni works at an e-commerce start-up that uses MongoDB for its customer data managament, product catalog and payment processing. Her startup now wants to add personalized recommendations for customers using real-time analytics. Jenni and her team will need to move data to a separate analytics database to handle this new use case. A.True B.False

False

Which of the following statements are true about MongoDB Atlas Clusters? (Select all that apply.) A. A MongoDB Atlas Cluster is a group of servers that are connected via a network that hold copies of your data. B. Once you set up and configure your MongoDB Atlas Cluster, you cannot make any changes to cloud-provider, region, or cluster tier. C. MongoDB Atlas Clusters can be deployed globally in a single geographical region or across multiple geographical regions, depending on the cluster tier. D. Dedicated clusters provide access to all Atlas features. E. None of the above.

Dedicated clusters provide access to all Atlas features. MongoDB Atlas Clusters can be deployed globally in a single geographical region or across multiple geographical regions, depending on the cluster tier. A MongoDB Atlas Cluster is a group of servers that are connected via a network that hold copies of your data.

What is the basic unit of data in MongoDB? (Select one.) A. Collection B. Database C. Document D. Row

Document

1. A query may include a ___________ that specifies the fields from the matching documents to return. a) selection b) projection c) union d) none of the mentioned

Answer: bExplanation: Queries specify criteria, or conditions, that identify the documents that MongoDB returns to the clients.

How can you fix the following error? (Select one.) MongoServerSelectionError: connection <monitor> to 34.239.188.169:27017 closed A.Update database access with the correct user credentials. B.Add your IP address in the Network Access panel in Atlas. C.Create a new database on your Atlas cluster.

B. Add your IP address in the Network Access panel in Atlas.

Which of the following cloud providers are available on a free-tier shared Atlas cluster? (Select all that apply.) A. Amazon Web Services B. Google Cloud C. DigitalOcean D. Microsoft Azure

B. Google Cloud . Amazon Web Services Microsoft Azure

Which REPL environment does the MongoDB Shell use? (Select one.) A. Python B. Node C. Bash D. Perl

B. Node

Which of the following statements are true about the _id field in MongoDB? (Select all that apply.) A. The user must specify the _id field for each inserted document. B. The _id field is required for each document. C. The _id field must be unique. D. The _id field is automatically included and populated with an ObjectId if the _id field is omitted in an inserted document.

B. The _id field is required for each document. C. The _id field must be unique. D. The _id field is automatically included and populated with an

What is the BSON? a. BSON is a binary representation of JSON documents b. All answer correct c. BSON is a binary representation of any file format. d. BSON is a Best Script Object Notation

BSON is a binary representation of JSON documents

To view databases and collections in the Atlas Data Explorer, which button should you select? (Select one.) A. Connect B. View Monitoring C. Browse Collections D. Create

C. Browse Collections

To connect your Atlas cluster with the MongoDB Shell, what do you need to run in the command line? (Select one.) A. The _id of the document(s) you want to work with B. The name of the collection that you want to use C. Your connection string

C. Your connection string

How can we fix the following error? (Select all that apply.) MongoServerError: bad auth : Authentication failed. A. Check that you are connecting to the correct database deployment. B. Update your IP address in the Network Access panel. C. Check that your username and password are spelled correctly in your connection string.

Check that you are connecting to the correct database deployment. Check that your username and password are spelled correctly in your connection string.