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Exam Certified Associate Developer for Apache Spark topic 1 question 33 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 33
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

Which of the following operations can be used to return the number of rows in a DataFrame?

  • A. DataFrame.numberOfRows()
  • B. DataFrame.n()
  • C. DataFrame.sum()
  • D. DataFrame.count()
  • E. DataFrame.countDistinct()
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Suggested Answer: D 🗳️
by outwalker at Nov. 8, 2023, 10:42 p.m.

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jds0
9 months, 2 weeks ago
Selected Answer: D
Option D is correct: DataFrame.count()
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outwalker
1 year, 5 months ago
The operation that can be used to return the number of rows in a DataFrame is: D. DataFrame.count() The count() method in Spark DataFrame returns the number of rows in the DataFrame, and it is the standard way to determine the row count. Options A, B, C, and E are not valid methods for counting the number of rows in a DataFrame.
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