📊 Pandas
Q. Which method is used to count non-null values in a DataFrame?
  • (A) count()
  • (B) sum()
  • (C) size()
  • (D) value_counts()
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✅ Correct Answer: (A) count()

Explanation: The count() method returns the number of non-NA/null values for each column or row.

Explanation by: Sikhar Chaudhary
The count() method returns the number of non-NA/null values for each column or row.

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