freeCodeCamp/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-duplicates.english.md

id, title, challengeType, videoId

id	title	challengeType	videoId
5e9a093a74c4063ca6f7c15f	Data Cleaning Duplicates	11	kj7QqjXhH6A

Description

Tests

question:
  text: 'The Python method <code>.duplicated()</code> returns a boolean Series for your DataFrame. <code>True</code> 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.
  solution: 2