Spark Advanced MCQ Questions with Answers (Latest 2026)
Practice Spark Advanced MCQ questions with detailed explanations and clear answer validation. These MCQs help you revise core concepts, compare close options, and improve accuracy for interviews, certification exams, and technical screening rounds. Use this updated 2026 set to strengthen fundamentals and confidence.
Q1. Which option best describes Catalyst optimizer?
Select an answer to check.
Answer: Rule-based + cost-based query optimizer.
Here, Rule-based + cost-based query optimizer. is the right choice. Optimizes DataFrame/SQL. It aligns directly with what the question asks about which option best describes catalyst optimizer. A quick elimination of partially true options helps confirm it.
Q2. What is the primary purpose of Catalyst optimizer?
Select an answer to check.
Answer: Rule-based + cost-based query optimizer.
In this case, Rule-based + cost-based query optimizer. is correct. Optimizes DataFrame/SQL. It aligns directly with what the question asks about what is the primary purpose of catalyst optimizer. A quick elimination of partially true options helps confirm it.
Q3. Which statement about Catalyst optimizer is most accurate?
Select an answer to check.
Answer: Rule-based + cost-based query optimizer.
The best option here is Rule-based + cost-based query optimizer.. Optimizes DataFrame/SQL. It aligns directly with what the question asks about which statement about catalyst optimizer is most accurate. A quick elimination of partially true options helps confirm it.
Q4. How is Catalyst optimizer best characterized?
Select an answer to check.
Answer: Rule-based + cost-based query optimizer.
For this question, Rule-based + cost-based query optimizer. is correct. Optimizes DataFrame/SQL. It aligns directly with what the question asks about how is catalyst optimizer best characterized. A quick elimination of partially true options helps confirm it.
Whole-stage code generation + memory mgmt. is the correct answer here. Speed via JIT-like codegen. It aligns directly with what the question asks about which option best describes tungsten. A quick elimination of partially true options helps confirm it.
Here, Whole-stage code generation + memory mgmt. is the right choice. Speed via JIT-like codegen. This matches the core idea being tested around what is the primary purpose of tungsten. A quick elimination of partially true options helps confirm it.
Q7. Which statement about Tungsten is most accurate?
In this case, Whole-stage code generation + memory mgmt. is correct. Speed via JIT-like codegen. This matches the core idea being tested around which statement about tungsten is most accurate. A quick elimination of partially true options helps confirm it.
The best option here is Whole-stage code generation + memory mgmt.. Speed via JIT-like codegen. This matches the core idea being tested around how is tungsten best characterized. A quick elimination of partially true options helps confirm it.
Q9. Which option best describes AQE?
Select an answer to check.
Answer: Adaptive Query Execution: re-plan at runtime.
For this question, Adaptive Query Execution: re-plan at runtime. is correct. Handles skew, dynamic joins. This matches the core idea being tested around which option best describes aqe. A quick elimination of partially true options helps confirm it.
Q10. What is the primary purpose of AQE?
Select an answer to check.
Answer: Adaptive Query Execution: re-plan at runtime.
Adaptive Query Execution: re-plan at runtime. is the correct answer here. Handles skew, dynamic joins. This matches the core idea being tested around what is the primary purpose of aqe. A quick elimination of partially true options helps confirm it.
Q11. Which statement about AQE is most accurate?
Select an answer to check.
Answer: Adaptive Query Execution: re-plan at runtime.
Here, Adaptive Query Execution: re-plan at runtime. is the right choice. Handles skew, dynamic joins. That is exactly the concept behind which statement about aqe is most accurate in this context. A quick elimination of partially true options helps confirm it.
Q12. How is AQE best characterized?
Select an answer to check.
Answer: Adaptive Query Execution: re-plan at runtime.
In this case, Adaptive Query Execution: re-plan at runtime. is correct. Handles skew, dynamic joins. That is exactly the concept behind how is aqe best characterized in this context. A quick elimination of partially true options helps confirm it.
Q13. Which option best describes dynamic partition coalescing?
Select an answer to check.
Answer: AQE merges small post-shuffle partitions.
The best option here is AQE merges small post-shuffle partitions.. Reduces small file overhead. That is exactly the concept behind which option best describes dynamic partition coalescing in this context. A quick elimination of partially true options helps confirm it.
Q14. What is the primary purpose of dynamic partition coalescing?
Select an answer to check.
Answer: AQE merges small post-shuffle partitions.
For this question, AQE merges small post-shuffle partitions. is correct. Reduces small file overhead. That is exactly the concept behind what is the primary purpose of dynamic partition in this context. A quick elimination of partially true options helps confirm it.
Q15. Which statement about dynamic partition coalescing is most accurate?
Select an answer to check.
Answer: AQE merges small post-shuffle partitions.
AQE merges small post-shuffle partitions. is the correct answer here. Reduces small file overhead. That is exactly the concept behind which statement about dynamic partition coalescing is most in this context. A quick elimination of partially true options helps confirm it.
Q16. How is dynamic partition coalescing best characterized?
Select an answer to check.
Answer: AQE merges small post-shuffle partitions.
Here, AQE merges small post-shuffle partitions. is the right choice. Reduces small file overhead. It fits the requirement in the prompt about how is dynamic partition coalescing best characterized. A quick elimination of partially true options helps confirm it.
Q17. Which option best describes dynamic join switching?
Select an answer to check.
Answer: AQE switches sort-merge to broadcast on small sides.
In this case, AQE switches sort-merge to broadcast on small sides. is correct. Adapts to actual data sizes. It fits the requirement in the prompt about which option best describes dynamic join switching. A quick elimination of partially true options helps confirm it.
Q18. What is the primary purpose of dynamic join switching?
Select an answer to check.
Answer: AQE switches sort-merge to broadcast on small sides.
The best option here is AQE switches sort-merge to broadcast on small sides.. Adapts to actual data sizes. It fits the requirement in the prompt about what is the primary purpose of dynamic join. A quick elimination of partially true options helps confirm it.
Q19. Which statement about dynamic join switching is most accurate?
Select an answer to check.
Answer: AQE switches sort-merge to broadcast on small sides.
For this question, AQE switches sort-merge to broadcast on small sides. is correct. Adapts to actual data sizes. It fits the requirement in the prompt about which statement about dynamic join switching is most. A quick elimination of partially true options helps confirm it.
Q20. How is dynamic join switching best characterized?
Select an answer to check.
Answer: AQE switches sort-merge to broadcast on small sides.
AQE switches sort-merge to broadcast on small sides. is the correct answer here. Adapts to actual data sizes. It fits the requirement in the prompt about how is dynamic join switching best characterized. A quick elimination of partially true options helps confirm it.
Q21. Which option best describes skew join handling?
Select an answer to check.
Answer: AQE splits skewed keys into more tasks.
Here, AQE splits skewed keys into more tasks. is the right choice. Mitigates stragglers. This is the most accurate statement for which option best describes skew join handling. A quick elimination of partially true options helps confirm it.
Q22. What is the primary purpose of skew join handling?
Select an answer to check.
Answer: AQE splits skewed keys into more tasks.
In this case, AQE splits skewed keys into more tasks. is correct. Mitigates stragglers. This is the most accurate statement for what is the primary purpose of skew join. A quick elimination of partially true options helps confirm it.
Q23. Which statement about skew join handling is most accurate?
Select an answer to check.
Answer: AQE splits skewed keys into more tasks.
The best option here is AQE splits skewed keys into more tasks.. Mitigates stragglers. This is the most accurate statement for which statement about skew join handling is most. A quick elimination of partially true options helps confirm it.
Q24. How is skew join handling best characterized?
Select an answer to check.
Answer: AQE splits skewed keys into more tasks.
For this question, AQE splits skewed keys into more tasks. is correct. Mitigates stragglers. This is the most accurate statement for how is skew join handling best characterized. A quick elimination of partially true options helps confirm it.
Q25. Which option best describes a broadcast join?
Select an answer to check.
Answer: Small side broadcast to all executors.
Small side broadcast to all executors. is the correct answer here. Best for small/large joins. This is the most accurate statement for which option best describes a broadcast join. A quick elimination of partially true options helps confirm it.
Q26. What is the primary purpose of a broadcast join?
Select an answer to check.
Answer: Small side broadcast to all executors.
Here, Small side broadcast to all executors. is the right choice. Best for small/large joins. It aligns directly with what the question asks about what is the primary purpose of a broadcast. The other options are either incomplete or contextually incorrect.
Q27. Which statement about a broadcast join is most accurate?
Select an answer to check.
Answer: Small side broadcast to all executors.
In this case, Small side broadcast to all executors. is correct. Best for small/large joins. It aligns directly with what the question asks about which statement about a broadcast join is most. The other options are either incomplete or contextually incorrect.
Q28. How is a broadcast join best characterized?
Select an answer to check.
Answer: Small side broadcast to all executors.
The best option here is Small side broadcast to all executors.. Best for small/large joins. It aligns directly with what the question asks about how is a broadcast join best characterized. The other options are either incomplete or contextually incorrect.
Q29. Which option best describes a sort-merge join?
Select an answer to check.
Answer: Sort both sides on key, then merge.
For this question, Sort both sides on key, then merge. is correct. Default for large/large joins. It aligns directly with what the question asks about which option best describes a sort-merge join. The other options are either incomplete or contextually incorrect.
Q30. What is the primary purpose of a sort-merge join?
Select an answer to check.
Answer: Sort both sides on key, then merge.
Sort both sides on key, then merge. is the correct answer here. Default for large/large joins. It aligns directly with what the question asks about what is the primary purpose of a sort-merge. The other options are either incomplete or contextually incorrect.
Q31. Which statement about a sort-merge join is most accurate?
Select an answer to check.
Answer: Sort both sides on key, then merge.
Here, Sort both sides on key, then merge. is the right choice. Default for large/large joins. This matches the core idea being tested around which statement about a sort-merge join is most. The other options are either incomplete or contextually incorrect.
Q32. How is a sort-merge join best characterized?
Select an answer to check.
Answer: Sort both sides on key, then merge.
In this case, Sort both sides on key, then merge. is correct. Default for large/large joins. This matches the core idea being tested around how is a sort-merge join best characterized. The other options are either incomplete or contextually incorrect.
Q33. Which option best describes a shuffle hash join?
Select an answer to check.
Answer: Hash partition on key; build hash on smaller side.
The best option here is Hash partition on key; build hash on smaller side.. Useful for medium-size. This matches the core idea being tested around which option best describes a shuffle hash join. The other options are either incomplete or contextually incorrect.
Q34. What is the primary purpose of a shuffle hash join?
Select an answer to check.
Answer: Hash partition on key; build hash on smaller side.
For this question, Hash partition on key; build hash on smaller side. is correct. Useful for medium-size. This matches the core idea being tested around what is the primary purpose of a shuffle. The other options are either incomplete or contextually incorrect.
Q35. Which statement about a shuffle hash join is most accurate?
Select an answer to check.
Answer: Hash partition on key; build hash on smaller side.
Hash partition on key; build hash on smaller side. is the correct answer here. Useful for medium-size. This matches the core idea being tested around which statement about a shuffle hash join is. The other options are either incomplete or contextually incorrect.
Q36. How is a shuffle hash join best characterized?
Select an answer to check.
Answer: Hash partition on key; build hash on smaller side.
Here, Hash partition on key; build hash on smaller side. is the right choice. Useful for medium-size. That is exactly the concept behind how is a shuffle hash join best characterized in this context. The other options are either incomplete or contextually incorrect.
Q37. Which option best describes a bucket join?
Select an answer to check.
Answer: Pre-bucketed tables join without shuffle.
In this case, Pre-bucketed tables join without shuffle. is correct. Requires bucketed sources. That is exactly the concept behind which option best describes a bucket join in this context. The other options are either incomplete or contextually incorrect.
Q38. What is the primary purpose of a bucket join?
Select an answer to check.
Answer: Pre-bucketed tables join without shuffle.
The best option here is Pre-bucketed tables join without shuffle.. Requires bucketed sources. That is exactly the concept behind what is the primary purpose of a bucket in this context. The other options are either incomplete or contextually incorrect.
Q39. Which statement about a bucket join is most accurate?
Select an answer to check.
Answer: Pre-bucketed tables join without shuffle.
For this question, Pre-bucketed tables join without shuffle. is correct. Requires bucketed sources. That is exactly the concept behind which statement about a bucket join is most in this context. The other options are either incomplete or contextually incorrect.
Q40. How is a bucket join best characterized?
Select an answer to check.
Answer: Pre-bucketed tables join without shuffle.
Pre-bucketed tables join without shuffle. is the correct answer here. Requires bucketed sources. That is exactly the concept behind how is a bucket join best characterized in this context. The other options are either incomplete or contextually incorrect.
Q41. Which option best describes predicate pushdown?
Select an answer to check.
Answer: Filters applied at source where possible.
Here, Filters applied at source where possible. is the right choice. Reduces I/O. It fits the requirement in the prompt about which option best describes predicate pushdown. The other options are either incomplete or contextually incorrect.
Q42. What is the primary purpose of predicate pushdown?
Select an answer to check.
Answer: Filters applied at source where possible.
In this case, Filters applied at source where possible. is correct. Reduces I/O. It fits the requirement in the prompt about what is the primary purpose of predicate pushdown. The other options are either incomplete or contextually incorrect.
Q43. Which statement about predicate pushdown is most accurate?
Select an answer to check.
Answer: Filters applied at source where possible.
The best option here is Filters applied at source where possible.. Reduces I/O. It fits the requirement in the prompt about which statement about predicate pushdown is most accurate. The other options are either incomplete or contextually incorrect.
Q44. How is predicate pushdown best characterized?
Select an answer to check.
Answer: Filters applied at source where possible.
For this question, Filters applied at source where possible. is correct. Reduces I/O. It fits the requirement in the prompt about how is predicate pushdown best characterized. The other options are either incomplete or contextually incorrect.
Q45. Which option best describes projection pushdown?
Select an answer to check.
Answer: Read only needed columns at source.
Read only needed columns at source. is the correct answer here. Columnar formats benefit. It fits the requirement in the prompt about which option best describes projection pushdown. The other options are either incomplete or contextually incorrect.
Q46. What is the primary purpose of projection pushdown?
Select an answer to check.
Answer: Read only needed columns at source.
Here, Read only needed columns at source. is the right choice. Columnar formats benefit. This is the most accurate statement for what is the primary purpose of projection pushdown. The other options are either incomplete or contextually incorrect.
Q47. Which statement about projection pushdown is most accurate?
Select an answer to check.
Answer: Read only needed columns at source.
In this case, Read only needed columns at source. is correct. Columnar formats benefit. This is the most accurate statement for which statement about projection pushdown is most accurate. The other options are either incomplete or contextually incorrect.
Q48. How is projection pushdown best characterized?
Select an answer to check.
Answer: Read only needed columns at source.
The best option here is Read only needed columns at source.. Columnar formats benefit. This is the most accurate statement for how is projection pushdown best characterized. The other options are either incomplete or contextually incorrect.
Q49. Which option best describes partition pruning?
Select an answer to check.
Answer: Skip irrelevant partitions on filter.
For this question, Skip irrelevant partitions on filter. is correct. Big I/O reduction. This is the most accurate statement for which option best describes partition pruning. The other options are either incomplete or contextually incorrect.
Q50. What is the primary purpose of partition pruning?
Select an answer to check.
Answer: Skip irrelevant partitions on filter.
Skip irrelevant partitions on filter. is the correct answer here. Big I/O reduction. This is the most accurate statement for what is the primary purpose of partition pruning. The other options are either incomplete or contextually incorrect.