Data ETL Lakehouse Basics MCQ Questions with Answers (Latest 2026)

Q1. Which option best describes a lakehouse?

A. Combines lake storage with warehouse semantics. B. A pure relational warehouse. C. A pure data lake. D. A pure cache.

Select an answer to check.

Answer: Combines lake storage with warehouse semantics.

Here, Combines lake storage with warehouse semantics. is the right choice. ACID + open formats. It aligns directly with what the question asks about which option best describes a lakehouse. A quick elimination of partially true options helps confirm it.

Q2. What is the primary purpose of a lakehouse?

A. A pure data lake. B. A pure relational warehouse. C. Combines lake storage with warehouse semantics. D. A pure cache.

Select an answer to check.

Answer: Combines lake storage with warehouse semantics.

In this case, Combines lake storage with warehouse semantics. is correct. ACID + open formats. It aligns directly with what the question asks about what is the primary purpose of a lakehouse. A quick elimination of partially true options helps confirm it.

Q3. Which statement about a lakehouse is most accurate?

A. Combines lake storage with warehouse semantics. B. A pure relational warehouse. C. A pure data lake. D. A pure cache.

Select an answer to check.

Answer: Combines lake storage with warehouse semantics.

The best option here is Combines lake storage with warehouse semantics.. ACID + open formats. It aligns directly with what the question asks about which statement about a lakehouse is most accurate. A quick elimination of partially true options helps confirm it.

Q4. How is a lakehouse best characterized?

A. A pure cache. B. A pure relational warehouse. C. A pure data lake. D. Combines lake storage with warehouse semantics.

Select an answer to check.

Answer: Combines lake storage with warehouse semantics.

For this question, Combines lake storage with warehouse semantics. is correct. ACID + open formats. It aligns directly with what the question asks about how is a lakehouse best characterized. A quick elimination of partially true options helps confirm it.

Q5. Which option best describes Delta Lake?

A. A pure index. B. A pure CSV format. C. A pure cache. D. Open lakehouse format with ACID transactions.

Select an answer to check.

Answer: Open lakehouse format with ACID transactions.

Open lakehouse format with ACID transactions. is the correct answer here. JSON transaction log on Parquet. It aligns directly with what the question asks about which option best describes delta lake. A quick elimination of partially true options helps confirm it.

Q6. What is the primary purpose of Delta Lake?

A. Open lakehouse format with ACID transactions. B. A pure CSV format. C. A pure cache. D. A pure index.

Select an answer to check.

Answer: Open lakehouse format with ACID transactions.

Here, Open lakehouse format with ACID transactions. is the right choice. JSON transaction log on Parquet. This matches the core idea being tested around what is the primary purpose of delta lake. A quick elimination of partially true options helps confirm it.

Q7. Which statement about Delta Lake is most accurate?

A. A pure cache. B. A pure CSV format. C. Open lakehouse format with ACID transactions. D. A pure index.

Select an answer to check.

Answer: Open lakehouse format with ACID transactions.

In this case, Open lakehouse format with ACID transactions. is correct. JSON transaction log on Parquet. This matches the core idea being tested around which statement about delta lake is most accurate. A quick elimination of partially true options helps confirm it.

Q8. How is Delta Lake best characterized?

A. A pure cache. B. Open lakehouse format with ACID transactions. C. A pure index. D. A pure CSV format.

Select an answer to check.

Answer: Open lakehouse format with ACID transactions.

The best option here is Open lakehouse format with ACID transactions.. JSON transaction log on Parquet. This matches the core idea being tested around how is delta lake best characterized. A quick elimination of partially true options helps confirm it.

Q9. Which option best describes Apache Iceberg?

A. Lakehouse format with snapshots and partition evolution. B. A pure relational engine. C. A pure cache. D. A pure file format.

Select an answer to check.

Answer: Lakehouse format with snapshots and partition evolution.

For this question, Lakehouse format with snapshots and partition evolution. is correct. Manifest-based metadata. This matches the core idea being tested around which option best describes apache iceberg. A quick elimination of partially true options helps confirm it.

Q10. What is the primary purpose of Apache Iceberg?

A. Lakehouse format with snapshots and partition evolution. B. A pure cache. C. A pure file format. D. A pure relational engine.

Select an answer to check.

Answer: Lakehouse format with snapshots and partition evolution.

Lakehouse format with snapshots and partition evolution. is the correct answer here. Manifest-based metadata. This matches the core idea being tested around what is the primary purpose of apache iceberg. A quick elimination of partially true options helps confirm it.

Q11. Which statement about Apache Iceberg is most accurate?

A. A pure file format. B. A pure cache. C. Lakehouse format with snapshots and partition evolution. D. A pure relational engine.

Select an answer to check.

Answer: Lakehouse format with snapshots and partition evolution.

Here, Lakehouse format with snapshots and partition evolution. is the right choice. Manifest-based metadata. That is exactly the concept behind which statement about apache iceberg is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q12. How is Apache Iceberg best characterized?

A. Lakehouse format with snapshots and partition evolution. B. A pure cache. C. A pure file format. D. A pure relational engine.

Select an answer to check.

Answer: Lakehouse format with snapshots and partition evolution.

In this case, Lakehouse format with snapshots and partition evolution. is correct. Manifest-based metadata. That is exactly the concept behind how is apache iceberg best characterized in this context. A quick elimination of partially true options helps confirm it.

Q13. Which option best describes Apache Hudi?

A. Lakehouse format for upserts and incrementals. B. A pure file format. C. A pure logger. D. A pure cache.

Select an answer to check.

Answer: Lakehouse format for upserts and incrementals.

The best option here is Lakehouse format for upserts and incrementals.. Copy-on-write and merge-on-read. That is exactly the concept behind which option best describes apache hudi in this context. A quick elimination of partially true options helps confirm it.

Q14. What is the primary purpose of Apache Hudi?

A. A pure cache. B. A pure file format. C. Lakehouse format for upserts and incrementals. D. A pure logger.

Select an answer to check.

Answer: Lakehouse format for upserts and incrementals.

For this question, Lakehouse format for upserts and incrementals. is correct. Copy-on-write and merge-on-read. That is exactly the concept behind what is the primary purpose of apache hudi in this context. A quick elimination of partially true options helps confirm it.

Q15. Which statement about Apache Hudi is most accurate?

A. A pure cache. B. A pure logger. C. A pure file format. D. Lakehouse format for upserts and incrementals.

Select an answer to check.

Answer: Lakehouse format for upserts and incrementals.

Lakehouse format for upserts and incrementals. is the correct answer here. Copy-on-write and merge-on-read. That is exactly the concept behind which statement about apache hudi is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q16. How is Apache Hudi best characterized?

A. A pure cache. B. Lakehouse format for upserts and incrementals. C. A pure file format. D. A pure logger.

Select an answer to check.

Answer: Lakehouse format for upserts and incrementals.

Here, Lakehouse format for upserts and incrementals. is the right choice. Copy-on-write and merge-on-read. It fits the requirement in the prompt about how is apache hudi best characterized. A quick elimination of partially true options helps confirm it.

Q17. Which option best describes the medallion architecture?

A. Pure snowflake schema. B. Pure star schema only. C. Pure single-tier lake. D. Bronze, Silver, Gold tiers.

Select an answer to check.

Answer: Bronze, Silver, Gold tiers.

In this case, Bronze, Silver, Gold tiers. is correct. Progressive refinement. It fits the requirement in the prompt about which option best describes the medallion architecture. A quick elimination of partially true options helps confirm it.

Q18. What is the primary purpose of the medallion architecture?

A. Pure star schema only. B. Bronze, Silver, Gold tiers. C. Pure snowflake schema. D. Pure single-tier lake.

Select an answer to check.

Answer: Bronze, Silver, Gold tiers.

The best option here is Bronze, Silver, Gold tiers.. Progressive refinement. It fits the requirement in the prompt about what is the primary purpose of the medallion. A quick elimination of partially true options helps confirm it.

Q19. Which statement about the medallion architecture is most accurate?

A. Pure snowflake schema. B. Bronze, Silver, Gold tiers. C. Pure star schema only. D. Pure single-tier lake.

Select an answer to check.

Answer: Bronze, Silver, Gold tiers.

For this question, Bronze, Silver, Gold tiers. is correct. Progressive refinement. It fits the requirement in the prompt about which statement about the medallion architecture is most. A quick elimination of partially true options helps confirm it.

Q20. How is the medallion architecture best characterized?

A. Bronze, Silver, Gold tiers. B. Pure star schema only. C. Pure single-tier lake. D. Pure snowflake schema.

Select an answer to check.

Answer: Bronze, Silver, Gold tiers.

Bronze, Silver, Gold tiers. is the correct answer here. Progressive refinement. It fits the requirement in the prompt about how is the medallion architecture best characterized. A quick elimination of partially true options helps confirm it.

Q21. Which option best describes bronze layer?

A. Curated data. B. Aggregates only. C. Raw ingested data. D. Pure cache.

Select an answer to check.

Answer: Raw ingested data.

Here, Raw ingested data. is the right choice. Source of truth for replay. This is the most accurate statement for which option best describes bronze layer. A quick elimination of partially true options helps confirm it.

Q22. What is the primary purpose of bronze layer?

A. Aggregates only. B. Curated data. C. Pure cache. D. Raw ingested data.

Select an answer to check.

Answer: Raw ingested data.

In this case, Raw ingested data. is correct. Source of truth for replay. This is the most accurate statement for what is the primary purpose of bronze layer. A quick elimination of partially true options helps confirm it.

Q23. Which statement about bronze layer is most accurate?

A. Pure cache. B. Aggregates only. C. Raw ingested data. D. Curated data.

Select an answer to check.

Answer: Raw ingested data.

The best option here is Raw ingested data.. Source of truth for replay. This is the most accurate statement for which statement about bronze layer is most accurate. A quick elimination of partially true options helps confirm it.

Q24. How is bronze layer best characterized?

A. Aggregates only. B. Pure cache. C. Curated data. D. Raw ingested data.

Select an answer to check.

Answer: Raw ingested data.

For this question, Raw ingested data. is correct. Source of truth for replay. This is the most accurate statement for how is bronze layer best characterized. A quick elimination of partially true options helps confirm it.

Q25. Which option best describes silver layer?

A. Cleansed and conformed data. B. Raw data. C. Pure aggregates. D. Pure cache.

Select an answer to check.

Answer: Cleansed and conformed data.

Cleansed and conformed data. is the correct answer here. Joins and dedup applied. This is the most accurate statement for which option best describes silver layer. A quick elimination of partially true options helps confirm it.

Q26. What is the primary purpose of silver layer?

A. Cleansed and conformed data. B. Raw data. C. Pure aggregates. D. Pure cache.

Select an answer to check.

Answer: Cleansed and conformed data.

Here, Cleansed and conformed data. is the right choice. Joins and dedup applied. It aligns directly with what the question asks about what is the primary purpose of silver layer. The other options are either incomplete or contextually incorrect.

Q27. Which statement about silver layer is most accurate?

A. Cleansed and conformed data. B. Pure cache. C. Raw data. D. Pure aggregates.

Select an answer to check.

Answer: Cleansed and conformed data.

In this case, Cleansed and conformed data. is correct. Joins and dedup applied. It aligns directly with what the question asks about which statement about silver layer is most accurate. The other options are either incomplete or contextually incorrect.

Q28. How is silver layer best characterized?

A. Cleansed and conformed data. B. Pure aggregates. C. Pure cache. D. Raw data.

Select an answer to check.

Answer: Cleansed and conformed data.

The best option here is Cleansed and conformed data.. Joins and dedup applied. It aligns directly with what the question asks about how is silver layer best characterized. The other options are either incomplete or contextually incorrect.

Q29. Which option best describes gold layer?

A. Aggregated, business-ready datasets. B. Cleansed only. C. Raw data. D. Pure cache.

Select an answer to check.

Answer: Aggregated, business-ready datasets.

For this question, Aggregated, business-ready datasets. is correct. Used by BI and apps. It aligns directly with what the question asks about which option best describes gold layer. The other options are either incomplete or contextually incorrect.

Q30. What is the primary purpose of gold layer?

A. Pure cache. B. Raw data. C. Cleansed only. D. Aggregated, business-ready datasets.

Select an answer to check.

Answer: Aggregated, business-ready datasets.

Aggregated, business-ready datasets. is the correct answer here. Used by BI and apps. It aligns directly with what the question asks about what is the primary purpose of gold layer. The other options are either incomplete or contextually incorrect.

Q31. Which statement about gold layer is most accurate?

A. Cleansed only. B. Pure cache. C. Aggregated, business-ready datasets. D. Raw data.

Select an answer to check.

Answer: Aggregated, business-ready datasets.

Here, Aggregated, business-ready datasets. is the right choice. Used by BI and apps. This matches the core idea being tested around which statement about gold layer is most accurate. The other options are either incomplete or contextually incorrect.

Q32. How is gold layer best characterized?

A. Raw data. B. Aggregated, business-ready datasets. C. Pure cache. D. Cleansed only.

Select an answer to check.

Answer: Aggregated, business-ready datasets.

In this case, Aggregated, business-ready datasets. is correct. Used by BI and apps. This matches the core idea being tested around how is gold layer best characterized. The other options are either incomplete or contextually incorrect.

Q33. Which option best describes ACID on lakes?

A. Pure read-only. B. Pure best-effort. C. Atomic, consistent, isolated, durable writes. D. Pure eventually consistent.

Select an answer to check.

Answer: Atomic, consistent, isolated, durable writes.

The best option here is Atomic, consistent, isolated, durable writes.. Provided by table formats. This matches the core idea being tested around which option best describes acid on lakes. The other options are either incomplete or contextually incorrect.

Q34. What is the primary purpose of ACID on lakes?

A. Pure best-effort. B. Atomic, consistent, isolated, durable writes. C. Pure read-only. D. Pure eventually consistent.

Select an answer to check.

Answer: Atomic, consistent, isolated, durable writes.

For this question, Atomic, consistent, isolated, durable writes. is correct. Provided by table formats. This matches the core idea being tested around what is the primary purpose of acid on. The other options are either incomplete or contextually incorrect.

Q35. Which statement about ACID on lakes is most accurate?

A. Pure best-effort. B. Atomic, consistent, isolated, durable writes. C. Pure read-only. D. Pure eventually consistent.

Select an answer to check.

Answer: Atomic, consistent, isolated, durable writes.

Atomic, consistent, isolated, durable writes. is the correct answer here. Provided by table formats. This matches the core idea being tested around which statement about acid on lakes is most. The other options are either incomplete or contextually incorrect.

Q36. How is ACID on lakes best characterized?

A. Pure eventually consistent. B. Atomic, consistent, isolated, durable writes. C. Pure read-only. D. Pure best-effort.

Select an answer to check.

Answer: Atomic, consistent, isolated, durable writes.

Here, Atomic, consistent, isolated, durable writes. is the right choice. Provided by table formats. That is exactly the concept behind how is acid on lakes best characterized in this context. The other options are either incomplete or contextually incorrect.

Q37. Which option best describes transaction log (Delta _delta_log)?

A. A pure index. B. A pure schema file. C. A pure cache. D. JSON log of changes per table.

Select an answer to check.

Answer: JSON log of changes per table.

In this case, JSON log of changes per table. is correct. Enables time travel. That is exactly the concept behind which option best describes transaction log (delta _delta_log) in this context. The other options are either incomplete or contextually incorrect.

Q38. What is the primary purpose of transaction log (Delta _delta_log)?

A. A pure index. B. A pure schema file. C. JSON log of changes per table. D. A pure cache.

Select an answer to check.

Answer: JSON log of changes per table.

The best option here is JSON log of changes per table.. Enables time travel. That is exactly the concept behind what is the primary purpose of transaction log in this context. The other options are either incomplete or contextually incorrect.

Q39. Which statement about transaction log (Delta _delta_log) is most accurate?

A. A pure cache. B. JSON log of changes per table. C. A pure index. D. A pure schema file.

Select an answer to check.

Answer: JSON log of changes per table.

For this question, JSON log of changes per table. is correct. Enables time travel. That is exactly the concept behind which statement about transaction log (delta _delta_log) is in this context. The other options are either incomplete or contextually incorrect.

Q40. How is transaction log (Delta _delta_log) best characterized?

A. JSON log of changes per table. B. A pure schema file. C. A pure index. D. A pure cache.

Select an answer to check.

Answer: JSON log of changes per table.

JSON log of changes per table. is the correct answer here. Enables time travel. That is exactly the concept behind how is transaction log (delta _delta_log) best characterized in this context. The other options are either incomplete or contextually incorrect.

Q41. Which option best describes snapshots?

A. Immutable point-in-time table versions. B. Pure caches. C. Pure backups. D. Pure indexes.

Select an answer to check.

Answer: Immutable point-in-time table versions.

Here, Immutable point-in-time table versions. is the right choice. Used for time travel. It fits the requirement in the prompt about which option best describes snapshots. The other options are either incomplete or contextually incorrect.

Q42. What is the primary purpose of snapshots?

A. Pure indexes. B. Immutable point-in-time table versions. C. Pure caches. D. Pure backups.

Select an answer to check.

Answer: Immutable point-in-time table versions.

In this case, Immutable point-in-time table versions. is correct. Used for time travel. It fits the requirement in the prompt about what is the primary purpose of snapshots. The other options are either incomplete or contextually incorrect.

Q43. Which statement about snapshots is most accurate?

A. Pure backups. B. Pure caches. C. Immutable point-in-time table versions. D. Pure indexes.

Select an answer to check.

Answer: Immutable point-in-time table versions.

The best option here is Immutable point-in-time table versions.. Used for time travel. It fits the requirement in the prompt about which statement about snapshots is most accurate. The other options are either incomplete or contextually incorrect.

Q44. How is snapshots best characterized?

A. Pure backups. B. Pure indexes. C. Pure caches. D. Immutable point-in-time table versions.

Select an answer to check.

Answer: Immutable point-in-time table versions.

For this question, Immutable point-in-time table versions. is correct. Used for time travel. It fits the requirement in the prompt about how is snapshots best characterized. The other options are either incomplete or contextually incorrect.

Q45. Which option best describes time travel?

A. A pure backup. B. A pure log. C. Query at past version/time. D. Pure rollback only.

Select an answer to check.

Answer: Query at past version/time.

Query at past version/time. is the correct answer here. Lakehouse feature. It fits the requirement in the prompt about which option best describes time travel. The other options are either incomplete or contextually incorrect.

Q46. What is the primary purpose of time travel?

A. A pure backup. B. A pure log. C. Query at past version/time. D. Pure rollback only.

Select an answer to check.

Answer: Query at past version/time.

Here, Query at past version/time. is the right choice. Lakehouse feature. This is the most accurate statement for what is the primary purpose of time travel. The other options are either incomplete or contextually incorrect.

Q47. Which statement about time travel is most accurate?

A. Pure rollback only. B. Query at past version/time. C. A pure log. D. A pure backup.

Select an answer to check.

Answer: Query at past version/time.

In this case, Query at past version/time. is correct. Lakehouse feature. This is the most accurate statement for which statement about time travel is most accurate. The other options are either incomplete or contextually incorrect.

Q48. How is time travel best characterized?

A. Query at past version/time. B. A pure backup. C. A pure log. D. Pure rollback only.

Select an answer to check.

Answer: Query at past version/time.

The best option here is Query at past version/time.. Lakehouse feature. This is the most accurate statement for how is time travel best characterized. The other options are either incomplete or contextually incorrect.

Q49. Which option best describes schema evolution?

A. Add/modify columns without rewriting all data. B. Pure manual migrations. C. Schema is frozen. D. Always re-ingest.

Select an answer to check.

Answer: Add/modify columns without rewriting all data.

For this question, Add/modify columns without rewriting all data. is correct. Forward/backward compat. This is the most accurate statement for which option best describes schema evolution. The other options are either incomplete or contextually incorrect.

Q50. What is the primary purpose of schema evolution?

A. Pure manual migrations. B. Add/modify columns without rewriting all data. C. Schema is frozen. D. Always re-ingest.

Select an answer to check.

Answer: Add/modify columns without rewriting all data.

Add/modify columns without rewriting all data. is the correct answer here. Forward/backward compat. This is the most accurate statement for what is the primary purpose of schema evolution. The other options are either incomplete or contextually incorrect.