Running scripts with node command in Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the node command do?

The node command runs JavaScript files outside the browser using the Node.js runtime.

beginner

How do you run a script named app.js using Node.js?

You run it by typing node app.js in the terminal or command prompt.

intermediate

What happens if you run node without any file name?

Node.js opens an interactive REPL (Read-Eval-Print Loop) where you can type JavaScript commands and see results immediately.

intermediate

Can you run a script with Node.js if the file is not in the current directory?

Yes, you provide the relative or absolute path to the file, like node ./scripts/app.js or node /home/user/app.js.

advanced

What is the purpose of the --inspect flag when running a Node.js script?

The --inspect flag starts the script with debugging enabled, allowing you to connect a debugger to inspect the code while it runs.

How do you start running a JavaScript file named server.js with Node.js?

A node server.js

B npm server.js

C js server.js

D run server.js

The correct command to run a JavaScript file with Node.js is node filename.

What does Node.js open if you run node without any arguments?

A A web server

B An error message

C A REPL to type JavaScript commands

D A file explorer

Running node alone opens the interactive REPL where you can type JavaScript commands.

Which of these commands runs a script located in a subfolder called scripts?

A node ./app.js

B node scripts/app.js

C node app.js scripts

D node /app.js

You specify the relative path to the script like node scripts/app.js.

What does the --inspect flag do when running a Node.js script?

A Enables debugging mode

B Runs the script faster

C Minifies the code

D Prevents errors

The --inspect flag enables debugging so you can connect a debugger.

If your script file is named index.js, which command is correct to run it?

A node run index.js

B node index

C node .js index

D node index.js

You must include the full filename with extension: node index.js.

Explain how to run a JavaScript file using Node.js from the terminal.

Think about the command format: node + filename

Describe what happens when you run the node command without any script file.

It’s like a mini JavaScript playground in your terminal.