MongoDB connection with mongodb driver in Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the MongoClient in the mongodb driver?

The MongoClient is used to connect to a MongoDB database server. It manages the connection and allows you to perform database operations.

beginner

Which method is used to establish a connection to MongoDB using the mongodb driver?

The connect() method of MongoClient is used to establish a connection to the MongoDB server.

beginner

What does the connection string URI typically include?

The connection string URI includes the protocol (mongodb:// or mongodb+srv://), the server address, port (optional), and database name. It may also include username and password for authentication.

intermediate

Why should you close the MongoDB connection after operations?

Closing the connection frees up resources and avoids potential memory leaks or too many open connections to the database server.

beginner

Show a simple example of connecting to MongoDB using the mongodb driver in Node.js.

import { MongoClient } from 'mongodb';

const uri = 'mongodb://localhost:27017';
const client = new MongoClient(uri);

async function run() {
  try {
    await client.connect();
    console.log('Connected to MongoDB');
  } finally {
    await client.close();
  }
}

run().catch(console.dir);

Which class do you use to connect to MongoDB in the official Node.js driver?

A MongoClient

B MongoConnection

C MongoDB

D MongoServer

The MongoClient class is the official way to connect to MongoDB using the Node.js driver.

What method do you call to start a connection to MongoDB?

A start()

B init()

C connect()

D open()

The connect() method on MongoClient establishes the connection.

What is the correct prefix for a MongoDB connection string URI?

A http://

B sql://

C ftp://

D mongodb://

MongoDB connection strings start with mongodb:// or mongodb+srv://.

Why is it important to close the MongoDB connection after use?

A To save battery on the server

B To free resources and avoid too many open connections

C To speed up queries

D To encrypt data

Closing the connection frees resources and prevents too many open connections.

Which of these is a valid way to import MongoClient in Node.js with ES modules?

A import { MongoClient } from 'mongodb';

B const MongoClient = require('mongodb');

C import MongoClient from 'mongodb';

D const { MongoClient } = require('mongodb');

With ES modules, use import { MongoClient } from 'mongodb';.

Explain how to connect to a MongoDB database using the mongodb driver in Node.js.

Think about the steps from importing to closing the connection.

What are the key parts of a MongoDB connection string URI?

Consider what you need to tell the driver to find and access your database.