Console methods beyond log in Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does console.error() do in Node.js?

console.error() prints error messages to the standard error stream. It is useful for showing problems separately from regular output.

beginner

How does console.warn() differ from console.log()?

console.warn() outputs a warning message, often styled differently in consoles to catch attention, while console.log() outputs general information.

beginner

What is the purpose of console.table()?

console.table() displays data as a table in the console, making arrays or objects easier to read and compare visually.

intermediate

Explain console.group() and console.groupEnd().

console.group() starts a new indented group in the console output to organize messages. console.groupEnd() closes the current group.

intermediate

What do console.time() and console.timeEnd() do?

They measure the time between the two calls with the same label, helping to check how long a piece of code takes to run.

Which console method would you use to display a warning message?

A console.debug()

B console.error()

C console.warn()

D console.info()

console.warn() is designed to show warning messages.

What does console.table() do?

A Prints data as plain text

B Prints data as a list

C Prints data as JSON

D Prints data as a table

console.table() formats arrays or objects into a readable table.

How do you measure execution time of code using console methods?

A console.time() and console.timeEnd()

B console.log() and console.error()

C console.group() and console.groupEnd()

D console.count() and console.countReset()

Use console.time() to start and console.timeEnd() to stop timing.

Which method groups console messages together?

A console.group()

B console.table()

C console.clear()

D console.trace()

console.group() creates an indented group for related messages.

What is the main difference between console.error() and console.log()?

A <code>console.error()</code> formats messages as tables, <code>console.log()</code> does not

B <code>console.error()</code> outputs to error stream, <code>console.log()</code> to standard output

C <code>console.error()</code> clears the console, <code>console.log()</code> prints messages

D There is no difference

console.error() sends output to the error stream, useful for errors.

Describe three console methods beyond console.log() and explain when to use each.

Think about different types of messages you want to show in the console.

How can you organize console output to make it easier to read using console methods?

Imagine grouping related notes in a notebook.