Interview preparation
Apache Spark interview questions
Every question starts with a direct answer you could say out loud, then explains why, when and what goes wrong. Tick questions off as you practise.
All Apache Spark questions
| # | Question | Difficulty | Type | Done |
|---|---|---|---|---|
| 1 | What is the difference between a transformation and an action in Spark? | Easy | conceptual | |
| 2 | Explain Spark jobs, stages and tasks. | Medium | conceptual | |
| 3 | How does partition count affect Spark performance? | Medium | optimization, conceptual | |
| 4 | What causes a shuffle in Spark? | Medium | conceptual | |
| 5 | What is data skew and how can you mitigate it? | Hard | optimization, debugging |
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