Node.js built-in debugger in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the Node.js debugger with a script named app.js.

Node.js

node [1] app.js

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

A--watch

Bdebug

C--inspect

D--run

Attempts:

3 left

💡 Hint

Common Mistakes

Using --inspect instead of debug starts the inspector, not the legacy debugger.

Using --watch or --run are invalid for debugging.

Use debug to start the built-in Node.js debugger in legacy mode.

2fill in blank

medium

Complete the code to start Node.js with the modern debugger listening on port 9229.

Node.js

node [1]=9229 app.js

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

A--debug

B--trace

C--inspect

D--profile

Attempts:

3 left

💡 Hint

Common Mistakes

Using --debug is deprecated and replaced by --inspect.

Using --trace or --profile does not start the debugger.

The --inspect flag starts the modern debugger and listens on the specified port.

3fill in blank

hard

Fix the error in the code to start the debugger and pause execution on the first line.

Node.js

node --inspect-brk=[1] app.js

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

A9229

Bdebug

Cstart

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Passing 'debug' or 'true' causes an error because the flag expects a port number.

Omitting the port number or using invalid values.

The --inspect-brk flag expects a port number to listen on, such as 9229.

4fill in blank

hard

Fill both blanks to start the Node.js debugger and open the inspector on port 9230.

Node.js

node [1]=[2] app.js

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

A--inspect

B9229

C9230

D--debug

Attempts:

3 left

💡 Hint

Common Mistakes

Using --debug instead of --inspect starts the legacy debugger.

Using the wrong port number causes connection issues.

Use --inspect=9230 to start the modern debugger listening on port 9230.

5fill in blank

hard

Fill all three blanks to start Node.js with the debugger, pause on the first line, and enable the inspector on port 9240.

Node.js

node [1] [2]=[3] app.js

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

A--inspect-brk

B--inspect

C9240

D--debug

Attempts:

3 left

💡 Hint

Common Mistakes

Using --debug instead of --inspect for modern debugging.

Not specifying the port or using the wrong flag order.

--inspect-brk pauses on the first line, --inspect=9240 enables the inspector on port 9240.