What is a React component?
PICTURE THIS: DATA SPLIT
Fit on train, tune on val, report on test once.
Simple meaning
A component is a function that returns UI from props and state.
WHY — React instead of guessing?
Why interviewers care about React:
who only read docs from people who shipped.
and tied to Full Stack work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1A component is a
function that returns UI from props and state.
- 2Pages are built by
composing smaller components instead of duplicating markup.
- 3Small, focused components are
easier to test and reuse.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
A component is a function that returns UI from props and state. Pages are built by composing smaller components instead of duplicating markup.