MongoDB MCQs – Installation and Setup

Understanding how to install and set up MongoDB is crucial for developers and database administrators. You’ll learn important concepts like starting the MongoDB server, connecting through the shell, configuring the server, and deploying MongoDB in different environments. These multiple-choice questions (MCQs) will help you prepare for interviews by ensuring you understand these key topics thoroughly.

1.) What is the primary command to start the MongoDB server?

A) mongo
B) mongod
C) mongorestore
D) mongodump

Answer: Option B

Explanation: The mongod command is used to start the MongoDB server (daemon process), which listens for client connections.

2.) Which command is used to access the MongoDB shell?

A) mongosh
B) mongo shell
C) mongo-client
D) mongodb

Answer: Option A

Explanation: The mongosh (MongoDB Shell) command is used to connect to the MongoDB server and perform database operations interactively.

3.) What is MongoDB Atlas?

A) A GUI for managing databases
B) A command-line tool for MongoDB
C) A cloud-based database service
D) A backup tool

Answer: Option C

Explanation: MongoDB Atlas is a fully-managed cloud database service provided by MongoDB, allowing users to deploy, manage, and scale databases on the cloud.

4.) On which port does MongoDB listen by default?

A) 3306
B) 5432
C) 8080
D) 27017

Answer: Option D

Explanation: MongoDB’s default listening port is 27017, used for client-server communication.

5.) Which file is used to configure the MongoDB server?

A) mongod.config
B) mongod.cfg
C) mongod.conf
D) mongos.conf

Answer: Option C

Explanation: The mongod.conf file is used to configure the MongoDB server, including storage, networking, and replication settings.

6.) What is the default installation directory for MongoDB on Windows?

A) C:\Program Files\MongoDB
B) C:\MongoDB\bin
C) C:\Program Files\NoSQL\MongoDB
D) C:\NoSQL\MongoDB

Answer: Option A

Explanation: By default, MongoDB is installed in the C:\Program Files\MongoDB directory on Windows.

7.) Which command is used to check the installed version of MongoDB?

A) mongodb -v
B) mongo –version
C) mongod –list
D) mongo -v

Answer: Option B

Explanation: The mongo –version command is used to check the installed version of the MongoDB shell. It displays detailed information about the version of MongoDB you have installed.

8.) How do you stop the MongoDB server on Linux?

A) Ctrl + C in the terminal
B) service mongod stop
C) killall mongod
D) All of the above

Answer: Option D

Explanation: You can stop the MongoDB server using any of these methods, depending on your environment.

9.) MongoDB Atlas provides which type of deployment?

A) On-premises
B) Private cloud only
C) Fully managed cloud clusters
D) In-memory only

Answer: Option C

Explanation: MongoDB Atlas provides fully-managed cloud clusters on platforms like AWS, Azure, and GCP.

10.) What is the purpose of the dbPath setting in mongod.conf?

A) To define the path for data storage
B) To set the default port
C) To specify the database username
D) To enable authentication

Answer: Option A

Explanation: The dbPath setting in mongod.conf specifies the directory where MongoDB stores its data files.

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