Real-world example:?

Short answer: If two developers change the same line in index.html (e.g., one changes the header text, another changes the same header), Git won’t know which to keep — you decide manually.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.