---
id: 5e9a093a74c4063ca6f7c15f
challengeType: 11
videoId: kj7QqjXhH6A
---

# --description--

More resources:

\- [Notebook](https://notebooks.ai/rmotr-curriculum/data-cleaning-rmotr-freecodecamp-fd76fa59)

# --question--

## --text--

The Python method `.duplicated()` returns a boolean Series for your DataFrame. `True` is the return value for rows that:

## --answers--

contain a duplicate, where the value for the row contains the first occurrence of that value.

---

contain a duplicate, where the value for the row is at least the second occurrence of that value.

---

contain a duplicate, where the value for the row contains either the first or second occurrence.

## --video-solution--

2

# --hints--


# --solutions--