MongoDB Insert Functionality Quiz

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69 Questions

Which term stands for 'Relational Database Management System'?

RDBMS

What is the purpose of a primary key in a database table?

To uniquely identify each record

What is the main disadvantage of using a fixed schema in RDBMS?

Cannot have dynamic fields on demand

Which method is used to connect to a MongoDB database using the MongoDB Shell?

use

What does CRUD stand for in the context of MongoDB?

Create, Read, Update, Delete

Which method is used to create a collection in MongoDB using the createCollection() database method?

createCollection()

Which method is used to insert a single document into a MongoDB database?

insertOne()

Which type of scaling involves adding more servers to distribute the workload?

Horizontal scaling

What does NoSQL stand for?

Not Only SQL

Which of the following best describes MongoDB?

A schema-less database system

What is the main advantage of using MongoDB over a relational database management system?

Better performance for complex queries

Which driver is not officially supported for MongoDB?

Swift

Which database is used for the tutorial?

MongoDB

What command should be used to install the mongodb package in a Node.js project?

npm install mongodb

What is the purpose of the MongoClient in the code snippet?

To connect to a MongoDB database

Which operator can be used in a MongoDB query to find documents where the value of a field is greater than another value?

$gt

Which operator can be used in a MongoDB query to find documents where either of two queries match?

$or

Which operator can be used in a MongoDB query to remove all elements from an array that match the query?

$pull

Which method can be used in MongoDB to query a collection and return only the first document that matches the query criteria?

findOne()

Which method in MongoDB is used to insert multiple documents at once?

insertMany()

Which method in MongoDB is used to select only one document from a collection?

findOne()

What does the 'projection' parameter in MongoDB find methods do?

It specifies the fields to exclude from the results

What does the $inc operator do in MongoDB update operations?

It increments a field value by a specified amount

MongoDB is a relational database management system.

False

NoSQL databases are designed to be distributed.

True

MongoDB is a document-oriented database.

True

MongoDB requires a predefined schema for data storage.

False

MongoDB is a relational database management system.

False

The createCollection() method in MongoDB is used to create a new collection.

True

The insertOne() method in MongoDB is used to insert multiple documents at once.

False

The use command in mongosh is used to change or create a new database.

True

MongoDB Query Language (MQL) is used for querying and manipulating data.

True

The find() method can be used to query a collection in MongoDB.

True

The $gt operator in MongoDB is used to match values greater than a specific value.

True

The $in operator in MongoDB is used to match values that are contained within an array.

True

RDBMS stands for "Relational Database Management System".

True

RDBMS allows for dynamic fields to be added on demand without altering the table structure.

False

The main problem with RDBMS is that it has a fixed schema and requires complex and time-consuming alterations to the table structure when the schema changes.

True

True or false: MongoDB is a relational database management system?

False

True or false: The MongoDB Node.js language driver can be used to perform CRUD operations on a MongoDB database?

True

True or false: The MongoClient is used to establish a connection to a MongoDB database in a Node.js project?

True

True or false: The 'sample_mflix' database is loaded with sample data in the MongoDB Atlas dashboard?

True

True or false: The insertMany() method in MongoDB can be used to insert multiple documents at once.

True

True or false: The findOne() method in MongoDB returns only the first document that matches the query criteria.

True

True or false: The updateMany() method in MongoDB updates all documents that match the provided query.

True

True or false: The drop() method in MongoDB removes a collection or view from the database.

True

Match the following MongoDB methods with their descriptions:

insertOne() = Inserts a single document into the database insertMany() = Inserts multiple documents into the database createCollection() = Creates a new collection find() = Queries a collection and returns the documents that match the query criteria

Match the following MongoDB concepts with their definitions:

Database = A container for collections Collection = A group of MongoDB documents Document = A set of key-value pairs CRUD = Acronym for Create, Read, Update, and Delete operations on a database

Match the following MongoDB terms with their descriptions:

$gt = Operator used to match values greater than a specific value in a query $inc = Operator used to increment the value of a field in an update operation $in = Operator used to match values that are contained within an array in a query $sample = Operator used to retrieve a random sample of documents from a collection

Match the following MongoDB methods with their usage:

show dbs = Displays all available databases use = Changes or creates a new database db..insertOne() = Inserts a single document into a collection db..find() = Retrieves all documents from a collection

Match the following database concepts with their definitions in the context of RDBMS:

Fixed schema = A constraint in RDBMS where the table structure needs to be altered if the schema changes Foreign keys = A type of constraint in RDBMS that establishes a link between two tables Primary keys = A type of constraint in RDBMS that uniquely identifies a record in a table Data types of the data columns = A part of the structure of a table in RDBMS that defines the type of data that can be stored in a column

Match the following database terms with their correct definitions:

RDBMS = A type of database management system that enforces a structured data model based on tables with predefined schemas NoSQL = A type of database that provides a mechanism for storage and retrieval of data that is modeled in means other than the tabular relations used in relational databases Foreign key = A field in a table that refers to the primary key in another table Primary key = A field in a table that uniquely identifies a record

Match the following database relationships with their correct definitions:

One-to-one = A relationship between two entities where each entity in the first table can have at most one related entity in the second table One-to-many = A relationship between two entities where each entity in the first table can have many related entities in the second table Many-to-one = A relationship between two entities where each entity in the first table can have at most one related entity in the second table, but each entity in the second table can have many related entities in the first table Many-to-many = A relationship between two entities where each entity in the first table can have many related entities in the second table, and each entity in the second table can have many related entities in the first table

Match the following terms with their correct definitions in the context of MongoDB:

$in operator = Used to match values that are contained within an array $inc operator = Used in MongoDB update operations to increment the value of a field by a specified amount Embedded Document = A document that is nested within another document Primary Key = A unique identifier for a document in a collection

Match the following features with their correct descriptions in the context of MongoDB:

Document-oriented database = A database that stores JSON-like documents with dynamic schemas Built-in horizontal scalability = The ability to add more servers and distribute the workload High performance and indexing = Efficient data retrieval and storage Rich queries and data aggregations = Support for complex data operations

Match the following terms with their correct definitions in the context of database systems:

SQL = A language used for relational database queries NoSQL = A class of schema-less database systems that are not based on the traditional relational database model RDBMS = A type of database system that is based on the relational model MongoDB = An open source, document-oriented database system that is not based on the traditional relational model

Match the following types of databases with their correct descriptions:

Key-value stores = A type of NoSQL database that uses a simple key-value data model Graph database = A type of NoSQL database that uses a graph structure to represent and store data Document-oriented = A type of NoSQL database that stores and retrieves data as documents Column family = A type of NoSQL database that stores data in columns rather than rows

Match the MongoDB methods with their descriptions:

insertMany() = Used to insert multiple documents at once find() = Used to select data from a collection, accepts a query object updateOne() = Updates the first document that matches the query deleteMany() = Deletes all documents that match the query

Match the following MongoDB concepts with their descriptions:

$inc operator = Used to increment a field value in update operations projection parameter = Describes which fields to include in the results of a find method upsert option = Inserts the document if it is not found during an update operation $gt operator = Used to match values greater than a specific value in a query

Match the MongoDB query operators with their descriptions:

$in = Matches values that are contained within an array $gt = Matches values greater than a specific value $inc = Increments a field value in update operations $or = Matches documents where either of two queries match

Match the following MongoDB methods with their descriptions:

insertOne() = Used to insert a single document into a MongoDB database drop() = Removes a collection or view from the database findOne() = Selects only the first document that matches the query criteria updateMany() = Updates all documents that match the provided query

Match the MongoDB query operators with their descriptions:

$eq = Values are equal $lt = Value is less than another value $in = Value is matched within an array $not = Returns documents where the query does not match

Match the MongoDB update operators with their descriptions:

$currentDate = Sets the field value to the current date $inc = Increments the field value $set = Sets the value of a field $addToSet = Adds distinct elements to an array

Match the MongoDB query methods with their descriptions:

find() = Used to query a collection and return all documents that match the query criteria findOne() = Used to query a collection and return only the first document that matches the query criteria insertOne() = Used to insert a single document into a MongoDB database insertMany() = Used to insert multiple documents at once

Match the MongoDB shell commands with their descriptions:

use = Used to change or create a new database db..find() = Used to query a collection and return all documents that match the query criteria db..findOne() = Used to query a collection and return only the first document that matches the query criteria db..insertOne() = Used to insert a single document into a MongoDB database

Match the following MongoDB related tasks with their correct steps:

Loading sample data into MongoDB Atlas = Click the ellipsis '...' and select 'Load Sample Dataset' Installing the MongoDB package in a Node.js project = Use the following command in your terminal: npm install mongodb Connecting to a MongoDB Atlas database = Get the connection string from the Atlas dashboard and replace the necessary fields Performing CRUD operations on a MongoDB database using the MongoDB Node.js language driver = Use the appropriate methods such as find(), insertOne(), updateMany(), etc.

Match the following terms with their correct definitions in the context of MongoDB:

MongoDB = A document-oriented NoSQL database program Node.js = A JavaScript runtime environment that executes JavaScript code outside of a web browser MongoDB Atlas = A cloud-based database service for MongoDB MongoDB Node.js language driver = A software component that enables interaction between a Node.js application and a MongoDB database

Match the following steps with their correct order in the process of using MongoDB with Node.js:

Step 1 = Install the mongodb package in your Node.js project Step 2 = Create a connection string to connect to the MongoDB Atlas database Step 3 = Use the connection string to establish a connection to the database Step 4 = Perform CRUD operations on the database using the MongoDB Node.js language driver

Match the following MongoDB operations with their correct descriptions:

find() = Used to query a collection and return a cursor to the matching documents insertOne() = Used to insert a single document into a collection updateMany() = Used to update multiple documents in a collection that match the filter deleteOne() = Used to delete a single document from a collection

Study Notes

Introduction to Databases

  • RDBMS (Relational Database Management System) is a type of database that uses tables with predefined schemas to store data.
  • Examples of RDBMS include MySQL, PostgreSQL, and Oracle.

RDBMS Characteristics

  • Enforces structured data model based on tables with predefined schemas.
  • Each table has a unique name and defines the structure of the data it stores.
  • Relationships between tables are defined using primary and foreign keys.
  • Schemas are fixed and must be altered if changes are needed.

Limitations of RDBMS

  • Fixed schema can be complex and time-consuming to alter.
  • Not designed for horizontal scaling, requires vertical scaling.
  • Not suitable for large amounts of unstructured data.

NoSQL Databases

  • NoSQL (Not Only SQL) databases are a class of schema-less databases.
  • Allow dynamic data structures and horizontal scaling.
  • Suitable for large amounts of unstructured data.

Types of NoSQL Databases

  • Key-value stores (e.g., Riak, Redis)
  • Graph databases (e.g., Neo4j)
  • Document-oriented databases (e.g., MongoDB)
  • Column-family stores (e.g., Cassandra)
  • Multi-model databases (e.g., OrientDB)

MongoDB

  • Document-oriented NoSQL database.
  • Uses JSON-like documents to store data.
  • Supports dynamic schema and horizontal scaling.
  • Rich query language and data aggregations.

MongoDB Features

  • Document-oriented database management system.
  • Built-in horizontal scalability.
  • High performance and indexing capabilities.
  • Rich queries and data aggregations.
  • Large ecosystem and community.

MongoDB Atlas

  • Cloud database platform.
  • Allows for easy deployment and management of MongoDB.
  • Provides scalability, security, and high performance.

Creating a Cluster and Database

  • Create a free "Shared Cluster" on MongoDB Atlas.
  • Choose a cloud provider and region.
  • Set up a user and add IP address to allow access.
  • Create a new user and password for database access.

MongoDB Shell (mongosh)

  • Interactive shell for MongoDB.
  • Used for database administration and development.
  • Supports JavaScript syntax and allows for querying and modifying data.

CRUD Operations

  • Create: insertOne() and insertMany() methods.
  • Read: find() and findOne() methods.
  • Update: updateOne() and updateMany() methods.
  • Delete: deleteOne() and deleteMany() methods.

Querying Data

  • MongoDB Query Language (MQL) used for querying and manipulating data.
  • Supports logical and comparison operators.
  • Allows for filtering and sorting data.

MongoDB Drivers

  • Provide access to MongoDB databases in various programming languages.
  • Supported languages include C, C++, C#, Go, Java, Node.js, PHP, Python, Ruby, Rust, Scala, and Swift.

MongoDB Node.js Driver

  • Used for interacting with MongoDB in Node.js applications.

  • Provides methods for CRUD operations and querying data.### Connecting to MongoDB using Node.js

  • Create a new instance of the MongoClient class with a URI parameter.

  • Use the connect method to establish a connection to the MongoDB database.

  • The db method is used to access a specific database, and the collection method is used to access a specific collection within that database.

Retrieving Data from MongoDB

  • The findOne method is used to retrieve the first document in a collection.
  • The result of the findOne method is a Promise, which is awaited using the await keyword.
  • The retrieved document is logged to the console using console.log.

CRUD Operations in MongoDB

  • The MongoDB Node.js driver supports CRUD (Create, Read, Update, Delete) operations.
  • The find method is used to retrieve multiple documents from a collection.
  • The insertOne and insertMany methods are used to create new documents in a collection.
  • The updateOne and updateMany methods are used to update existing documents in a collection.
  • The deleteOne and deleteMany methods are used to delete documents from a collection.

Closing the Database Connection

  • The close method is used to close the database connection when finished or an error occurs.
  • The finally block is used to ensure that the database connection is closed regardless of whether an error occurs or not.

Test your knowledge of MongoDB's insert functionality with this quiz. Learn how to insert single and multiple documents into collections, and discover what happens when inserting into a non-existent collection.

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