MongoDB installation and setup - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is MongoDB?

MongoDB is a NoSQL database that stores data in flexible, JSON-like documents instead of tables.

beginner

Name the official website to download MongoDB.

You can download MongoDB from the official website: https://www.mongodb.com/try/download/community

beginner

What command starts the MongoDB server on your machine?

The command to start the MongoDB server is mongod.

beginner

After installing MongoDB, which command lets you connect to the database shell?

Use the command mongosh to open the MongoDB shell and interact with the database.

intermediate

Why is it important to add MongoDB's bin folder to your system PATH?

Adding MongoDB's bin folder to PATH lets you run MongoDB commands like mongod and mongosh from any terminal window without typing the full path.

Which command starts the MongoDB server?

A mongod

B mongo

C mongos

D mongocli

The mongod command starts the MongoDB server process.

Where can you download the MongoDB Community Server?

A https://www.mongodb.org/downloads

B https://www.mysql.com/downloads/

C https://www.postgresql.org/download/

D https://www.mongodb.com/try/download/community

The official MongoDB Community Server download page is at https://www.mongodb.com/try/download/community.

What does the mongosh command do?

A Connects to the MongoDB shell

B Starts the MongoDB server

C Installs MongoDB

D Updates MongoDB

The mongosh command opens the MongoDB shell to interact with the database.

Why should you add MongoDB's bin folder to your system PATH?

A To backup MongoDB data automatically

B To run MongoDB commands from any terminal

C To speed up MongoDB queries

D To uninstall MongoDB

Adding the bin folder to PATH allows running MongoDB commands like mongod and mongosh from any terminal window.

Which of these is NOT part of MongoDB installation steps?

A Download MongoDB installer

B Connect to MongoDB shell with mongosh

C Run SQL queries to create tables

D Start MongoDB server with mongod

MongoDB does not use SQL or tables; it uses JSON-like documents.

Describe the basic steps to install and start MongoDB on your computer.

Think about downloading, installing, setting environment, starting server, and connecting shell.

Explain why adding MongoDB's bin folder to the system PATH is helpful during setup.

Consider how PATH affects command line usage.

Practice

1. What is the first step to use MongoDB on your computer?

easy

A. Install MongoDB software

B. Create a database

C. Write queries

D. Connect to the internet

Solution

1. Step 1: Understand MongoDB setup process

   Before using MongoDB, you must have the software installed on your machine.

2. Step 2: Identify the initial action

   Installing MongoDB is the first step before creating databases or running queries.

3. Final Answer:

   Install MongoDB software -> Option A

4. Quick Check:

   First step = Install MongoDB software [OK]

Hint: Always install MongoDB before using it [OK]

Common Mistakes:

• Trying to create database before installation
• Assuming internet connection is needed first

2. Which command starts the MongoDB server on a local machine?

easy

A. mongod

B. mongo start

C. start mongo

D. mongo --start

Solution

1. Step 1: Recall MongoDB server start command

   The MongoDB server is started using the mongod command in the terminal.

2. Step 2: Check other options

   Options like mongo --start or mongo start are incorrect commands.

3. Final Answer:

   mongod -> Option A

4. Quick Check:

   Server start command = mongod [OK]

Hint: Use 'mongod' to start the MongoDB server [OK]

Common Mistakes:

• Using 'mongo' instead of 'mongod'
• Adding extra flags incorrectly

3. After installing MongoDB and starting the server, which command opens the MongoDB shell?

medium

A. mongod

B. mongo

C. start mongo

D. mongoshell

Solution

1. Step 1: Identify the shell command

   The MongoDB shell is accessed by running the mongo command after the server is running.

2. Step 2: Verify other options

   mongod starts the server, not the shell; others are invalid commands.

3. Final Answer:

   mongo -> Option B

4. Quick Check:

   Shell command = mongo [OK]

Hint: Use 'mongo' to open the MongoDB shell [OK]

Common Mistakes:

• Confusing 'mongod' with 'mongo'
• Typing invalid commands like 'mongoshell'

4. You tried to start MongoDB server with mongo command but got an error. What is the likely cause?

medium

A. MongoDB is not installed

B. MongoDB server is already running

C. You used the shell command instead of the server command

D. You need to connect to internet first

Solution

1. Step 1: Understand command roles

   mongo opens the shell, it does not start the server.

2. Step 2: Identify the error cause

   Using mongo to start the server causes an error because the server needs mongod.

3. Final Answer:

   You used the shell command instead of the server command -> Option C

4. Quick Check:

   Server start requires 'mongod', not 'mongo' [OK]

Hint: Use 'mongod' to start server, 'mongo' for shell [OK]

Common Mistakes:

• Using 'mongo' to start server
• Assuming internet is needed
• Ignoring installation status

5. You installed MongoDB and started the server with mongod. Now you want to connect to a specific database named shopDB using the shell. Which command should you run?

hard

A. mongosh --database shopDB

B. mongod shopDB

C. mongo --db shopDB

D. mongo shopDB

Solution

1. Step 1: Recall how to connect to a database in shell

   To connect to a specific database, you use mongo databaseName.

2. Step 2: Check other options

   mongod starts server, not shell; mongosh is a newer shell but mongosh --database shopDB uses wrong flag; mongo --db shopDB is invalid syntax.

3. Final Answer:

   mongo shopDB -> Option D

4. Quick Check:

   Connect to DB = mongo shopDB [OK]

Hint: Use 'mongo databaseName' to connect to a DB [OK]

Common Mistakes:

• Using 'mongod' to connect
• Wrong flags with 'mongosh'
• Assuming '--db' flag works