Apache Spark quiz

Test your Apache Spark knowledge with a free interactive quiz — 51 questions with answers and explanations. No signup needed to play.

Which of the following is a transformation, not an action?

1. Which of the following is a transformation, not an action?
2. What happens when you call df.write.mode("overwrite").parquet(path)?
3. Which of these best describes a Spark "job"?
4. What is the difference between spark.read.csv() with inferSchema=True vs a manually defined schema?
5. What is the purpose of df.printSchema()?
6. What is the role of the Spark driver?
7. What does it mean that Spark transformations are "lazy"?
8. What is a cluster manager in the Spark architecture?
9. What does the term "wide transformation" refer to?
10. What does df.groupBy("category").count() return?
11. What is the purpose of the .explain() method on a DataFrame?
12. What does executor memory hold?

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