What is lifting state up?
PICTURE THIS: REACT RENDER CYCLE
Simple meaning
When two siblings need the same data, I move that state to the closest common parent and pass it down as props.
WHY — React instead of guessing?
Why interviewers care about React:
who only read docs from people who shipped.
and tied to Frontend 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:
- 1When two siblings need
the same data, I move that state to the closest common parent and pass it down as props.
- 2That keeps a single
source of truth.
- 3If the tree gets
deep, I consider Context instead of prop drilling.
- 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
When two siblings need the same data, I move that state to the closest common parent and pass it down as props. That keeps a single source of truth.