MongoDB installation and setup - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to start the MongoDB server.

MongoDB

mongod --[1] /data/db

Drag options to blanks, or click blank then click option'

Aport

Bdbpath

Cbind_ip

Dlogpath

Attempts:

3 left

💡 Hint

Common Mistakes

Using --port instead of --dbpath

Forgetting to specify the data directory

Using --logpath which is for logs, not data

The --dbpath option specifies the directory where MongoDB stores its data files.

2fill in blank

medium

Complete the command to connect to the MongoDB server using the shell.

MongoDB

mongo --[1] 27017

Drag options to blanks, or click blank then click option'

Ausername

Bdbpath

Chost

Dport

Attempts:

3 left

💡 Hint

Common Mistakes

Using --dbpath which is for the server, not the client

Using --host without specifying the port

Using --username without authentication setup

The --port option specifies the port number to connect to the MongoDB server.

3fill in blank

hard

Fix the error in the command to start MongoDB with a custom log file.

MongoDB

mongod --dbpath /data/db --[1] /var/log/mongodb.log --fork

Drag options to blanks, or click blank then click option'

Alogfile

BlogfilePath

Clogpath

Dlogpathfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using --logfile which is not a valid option

Using --logfilePath which is incorrect casing

Using --logpathfile which is not recognized

The correct option to specify the log file path is --logpath.

4fill in blank

hard

Fill both blanks to create a directory and set permissions for MongoDB data storage.

MongoDB

sudo mkdir -p [1] && sudo chown [2] [1]

Drag options to blanks, or click blank then click option'

A/data/db

Bmongodb

Croot

D/var/lib/mongo

Attempts:

3 left

💡 Hint

Common Mistakes

Using root as owner which can cause permission issues

Using wrong directory paths

Not creating the directory before changing ownership

The data directory is usually /data/db, and the owner should be the mongodb user for proper permissions.

5fill in blank

hard

Fill all three blanks to write a command that installs MongoDB on Ubuntu using apt.

MongoDB

sudo apt-get update && sudo apt-get install -y [1]-org && sudo systemctl [2] [3]

Drag options to blanks, or click blank then click option'

Amongodb

Bstart

Cmongod

Drestart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'mongodb' without '-org' suffix

Using 'restart' instead of 'start' when first starting

Using wrong service name like 'mongodb' instead of 'mongod'

You install the mongodb-org package, then start the mongod service with systemctl start.

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