MongoDB Shell (mongosh) basics - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is mongosh in MongoDB?

mongosh is the interactive command-line shell for MongoDB. It lets you connect to your database, run commands, and see results immediately.

beginner

How do you connect to a local MongoDB server using mongosh?

Simply type mongosh in your terminal and press Enter. It connects to mongodb://localhost:27017 by default.

beginner

What command lists all databases in mongosh?

Use show dbs to see all databases on the connected MongoDB server.

beginner

How do you switch to a specific database in mongosh?

Use use <databaseName>. For example, use mydb switches to the database named mydb.

beginner

How do you insert a document into a collection using mongosh?

Use db.collectionName.insertOne({key: 'value'}). For example, db.users.insertOne({name: 'Alice', age: 25}) adds a user document.

What does the command show dbs do in mongosh?

A Connects to a new database

B Shows all collections in the current database

C Displays documents in a collection

D Lists all databases on the server

show dbs lists all databases available on the connected MongoDB server.

How do you switch to a database named shop in mongosh?

A use shop

B connect shop

C switch shop

D db shop

The command use shop switches your session to the shop database.

Which command inserts a document into the products collection?

A db.products.add({name: 'Pen'})

B db.products.insertOne({name: 'Pen'})

C insert db.products {name: 'Pen'}

D add products {name: 'Pen'}

db.products.insertOne({name: 'Pen'}) correctly inserts a single document into the products collection.

What is the default address mongosh connects to if no parameters are given?

A mongodb://localhost:27017

B mongodb://127.0.0.1:8080

C mongodb://remotehost:27017

D mongodb://localhost:3000

By default, mongosh connects to mongodb://localhost:27017.

How do you see all collections in the current database?

A db.showCollections()

B list collections

C show collections

D collections show

The command show collections lists all collections in the current database.

Explain how to connect to MongoDB using mongosh and switch to a database named testdb.

Think about starting the shell and changing the database context.

Describe the steps to insert a new document into a collection called customers using mongosh.

Focus on the insertOne method and document format.