Handling uncaught exceptions in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to catch uncaught exceptions in Node.js.

Node.js

process.on('uncaughtException', (err) => {
  console.[1]('Caught exception:', err);
});

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

Ainfo

Berror

Cwarn

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Using console.log instead of console.error

Misspelling 'uncaughtException'

Not passing the error parameter

The process.on('uncaughtException') event handler uses console.error to log errors clearly.

2fill in blank

medium

Complete the code to exit the process after logging an uncaught exception.

Node.js

process.on('uncaughtException', (err) => {
  console.error(err);
  process.[1](1);
});

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

Aexit

Bterminate

Cend

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using process.stop or process.end which do not exist

Not exiting the process after an uncaught exception

Use process.exit(1) to stop the Node.js process with an error code after handling the exception.

3fill in blank

hard

Fix the error in the code to properly handle uncaught exceptions.

Node.js

process.on('uncaughtException', (error) => {
  console.error('Error:', [1]);
});

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

Aerr

Berror.message

Cerror

Dexception

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than the parameter

Logging only error.message which hides stack trace

The callback parameter is named error, so use error to log the full error object.

4fill in blank

hard

Fill both blanks to log the error stack and then exit the process.

Node.js

process.on('uncaughtException', (err) => {
  console.[1](err.[2]);
  process.exit(1);
});

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

Aerror

Bstack

Cmessage

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Using console.log instead of console.error

Logging err.message instead of err.stack

Use console.error to log the error stack trace (err.stack) for detailed debugging.

5fill in blank

hard

Fill all three blanks to create a handler that logs the error, cleans up, and exits.

Node.js

process.on('uncaughtException', (err) => {
  console.[1]('Uncaught:', err.[2]);
  cleanup();
  process.[3](1);
});

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

Aerror

Bmessage

Cexit

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Using console.error but wanting a simple log message

Logging err.stack instead of err.message here

Forgetting to exit the process

Use console.log to print a simple message with err.message, then call process.exit(1) after cleanup.