Easy React Question 43 of 226

What is the difference between function components and class components?

MERN Full Stack · Speak this in 60–90 seconds · Faridabad & Delhi NCR

StackLIFOlast in, first out

QueueFIFOfirst in, first out

Class components use this.state and lifecycle methods.

Why interviewers care about React:

They want a clean

contrast on React, not two memorised paragraphs.

Say what changes for

the developer, then one case where picking wrong hurts.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

Before you speak the answer, walk the interviewer through these steps:

1
Class components use this.state
and lifecycle methods.
2
Function components use hooks
and are the current standard.
3
New MERN code should
use function components unless it is maintaining a legacy class.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

Here's a short line you can speak, broken into clear beats:

Say this line

“Function components use hooks and are the current standard.”

Break into beats

Functioncomponentsusehooksandare

Speaking order

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Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

Class components use this.state and lifecycle methods. Function components use hooks and are the current standard.