Spark Delta Lake Basics MCQ Questions with Answers – Page 2 (Latest 2026)
Practice Spark Delta Lake Basics 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.
Q51. Which statement about VACUUM is most accurate?
Select an answer to check.
Answer: Remove unreferenced files past retention.
Here, Remove unreferenced files past retention. is the right choice. Required for cost; respects retention. It aligns directly with what the question asks about which statement about vacuum is most accurate. Competing choices sound plausible, but they miss the key condition.
Q52. How is VACUUM best characterized?
Select an answer to check.
Answer: Remove unreferenced files past retention.
In this case, Remove unreferenced files past retention. is correct. Required for cost; respects retention. It aligns directly with what the question asks about how is vacuum best characterized. Competing choices sound plausible, but they miss the key condition.
Q53. Which option best describes retention period?
Select an answer to check.
Answer: Default 7 days; protects time travel.
The best option here is Default 7 days; protects time travel.. Configurable per table. It aligns directly with what the question asks about which option best describes retention period. Competing choices sound plausible, but they miss the key condition.
Q54. What is the primary purpose of retention period?
Select an answer to check.
Answer: Default 7 days; protects time travel.
For this question, Default 7 days; protects time travel. is correct. Configurable per table. It aligns directly with what the question asks about what is the primary purpose of retention period. Competing choices sound plausible, but they miss the key condition.
Q55. Which statement about retention period is most accurate?
Select an answer to check.
Answer: Default 7 days; protects time travel.
Default 7 days; protects time travel. is the correct answer here. Configurable per table. It aligns directly with what the question asks about which statement about retention period is most accurate. Competing choices sound plausible, but they miss the key condition.
Q56. How is retention period best characterized?
Select an answer to check.
Answer: Default 7 days; protects time travel.
Here, Default 7 days; protects time travel. is the right choice. Configurable per table. This matches the core idea being tested around how is retention period best characterized. Competing choices sound plausible, but they miss the key condition.
Q57. Which option best describes CDF (Change Data Feed)?
Select an answer to check.
Answer: Read row-level changes from Delta.
In this case, Read row-level changes from Delta. is correct. Enabled per table. This matches the core idea being tested around which option best describes cdf (change data feed). Competing choices sound plausible, but they miss the key condition.
Q58. What is the primary purpose of CDF (Change Data Feed)?
Select an answer to check.
Answer: Read row-level changes from Delta.
The best option here is Read row-level changes from Delta.. Enabled per table. This matches the core idea being tested around what is the primary purpose of cdf (change. Competing choices sound plausible, but they miss the key condition.
Q59. Which statement about CDF (Change Data Feed) is most accurate?
Select an answer to check.
Answer: Read row-level changes from Delta.
For this question, Read row-level changes from Delta. is correct. Enabled per table. This matches the core idea being tested around which statement about cdf (change data feed) is. Competing choices sound plausible, but they miss the key condition.
Q60. How is CDF (Change Data Feed) best characterized?
Select an answer to check.
Answer: Read row-level changes from Delta.
Read row-level changes from Delta. is the correct answer here. Enabled per table. This matches the core idea being tested around how is cdf (change data feed) best characterized. Competing choices sound plausible, but they miss the key condition.
Q61. Which option best describes streaming source/sink?
Select an answer to check.
Answer: Stream from/to Delta tables.
Here, Stream from/to Delta tables. is the right choice. Structured Streaming integration. That is exactly the concept behind which option best describes streaming source/sink in this context. Competing choices sound plausible, but they miss the key condition.
Q62. What is the primary purpose of streaming source/sink?
Select an answer to check.
Answer: Stream from/to Delta tables.
In this case, Stream from/to Delta tables. is correct. Structured Streaming integration. That is exactly the concept behind what is the primary purpose of streaming source/sink in this context. Competing choices sound plausible, but they miss the key condition.
Q63. Which statement about streaming source/sink is most accurate?
Select an answer to check.
Answer: Stream from/to Delta tables.
The best option here is Stream from/to Delta tables.. Structured Streaming integration. That is exactly the concept behind which statement about streaming source/sink is most accurate in this context. Competing choices sound plausible, but they miss the key condition.
Q64. How is streaming source/sink best characterized?
Select an answer to check.
Answer: Stream from/to Delta tables.
For this question, Stream from/to Delta tables. is correct. Structured Streaming integration. That is exactly the concept behind how is streaming source/sink best characterized in this context. Competing choices sound plausible, but they miss the key condition.
Q65. Which option best describes partitioning Delta tables?
Select an answer to check.
Answer: Partition by low-cardinality columns.
Partition by low-cardinality columns. is the correct answer here. Improves pruning. That is exactly the concept behind which option best describes partitioning delta tables in this context. Competing choices sound plausible, but they miss the key condition.
Q66. What is the primary purpose of partitioning Delta tables?
Select an answer to check.
Answer: Partition by low-cardinality columns.
Here, Partition by low-cardinality columns. is the right choice. Improves pruning. It fits the requirement in the prompt about what is the primary purpose of partitioning delta. Competing choices sound plausible, but they miss the key condition.
Q67. Which statement about partitioning Delta tables is most accurate?
Select an answer to check.
Answer: Partition by low-cardinality columns.
In this case, Partition by low-cardinality columns. is correct. Improves pruning. It fits the requirement in the prompt about which statement about partitioning delta tables is most. Competing choices sound plausible, but they miss the key condition.
Q68. How is partitioning Delta tables best characterized?
Select an answer to check.
Answer: Partition by low-cardinality columns.
The best option here is Partition by low-cardinality columns.. Improves pruning. It fits the requirement in the prompt about how is partitioning delta tables best characterized. Competing choices sound plausible, but they miss the key condition.
Q69. Which option best describes liquid clustering?
For this question, Auto-clustering replacing partitioning/Z-ORDER (newer). is correct. Databricks feature. It fits the requirement in the prompt about which option best describes liquid clustering. Competing choices sound plausible, but they miss the key condition.
Q70. What is the primary purpose of liquid clustering?
Auto-clustering replacing partitioning/Z-ORDER (newer). is the correct answer here. Databricks feature. It fits the requirement in the prompt about what is the primary purpose of liquid clustering. Competing choices sound plausible, but they miss the key condition.
Q71. Which statement about liquid clustering is most accurate?
Here, Auto-clustering replacing partitioning/Z-ORDER (newer). is the right choice. Databricks feature. This is the most accurate statement for which statement about liquid clustering is most accurate. Competing choices sound plausible, but they miss the key condition.
In this case, Auto-clustering replacing partitioning/Z-ORDER (newer). is correct. Databricks feature. This is the most accurate statement for how is liquid clustering best characterized. Competing choices sound plausible, but they miss the key condition.
Q73. Which option best describes Delta deep clone?
Select an answer to check.
Answer: Full copy of table including history.
The best option here is Full copy of table including history.. For migrations and dev. This is the most accurate statement for which option best describes delta deep clone. Competing choices sound plausible, but they miss the key condition.
Q74. What is the primary purpose of Delta deep clone?
Select an answer to check.
Answer: Full copy of table including history.
For this question, Full copy of table including history. is correct. For migrations and dev. This is the most accurate statement for what is the primary purpose of delta deep. Competing choices sound plausible, but they miss the key condition.
Q75. Which statement about Delta deep clone is most accurate?
Select an answer to check.
Answer: Full copy of table including history.
Full copy of table including history. is the correct answer here. For migrations and dev. This is the most accurate statement for which statement about delta deep clone is most. Competing choices sound plausible, but they miss the key condition.
Q76. How is Delta deep clone best characterized?
Select an answer to check.
Answer: Full copy of table including history.
Here, Full copy of table including history. is the right choice. For migrations and dev. It aligns directly with what the question asks about how is delta deep clone best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q77. Which option best describes Delta shallow clone?
In this case, Metadata-only copy referencing source files. is correct. Cheap test copies. It aligns directly with what the question asks about which option best describes delta shallow clone. The remaining choices fail because they don’t satisfy the full definition.
Q78. What is the primary purpose of Delta shallow clone?
The best option here is Metadata-only copy referencing source files.. Cheap test copies. It aligns directly with what the question asks about what is the primary purpose of delta shallow. The remaining choices fail because they don’t satisfy the full definition.
Q79. Which statement about Delta shallow clone is most accurate?
For this question, Metadata-only copy referencing source files. is correct. Cheap test copies. It aligns directly with what the question asks about which statement about delta shallow clone is most. The remaining choices fail because they don’t satisfy the full definition.
Q80. How is Delta shallow clone best characterized?
Metadata-only copy referencing source files. is the correct answer here. Cheap test copies. It aligns directly with what the question asks about how is delta shallow clone best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q81. Which option best describes constraints?
Select an answer to check.
Answer: CHECK/NOT NULL constraints on Delta.
Here, CHECK/NOT NULL constraints on Delta. is the right choice. Enforced on write. This matches the core idea being tested around which option best describes constraints. The remaining choices fail because they don’t satisfy the full definition.
Q82. What is the primary purpose of constraints?
Select an answer to check.
Answer: CHECK/NOT NULL constraints on Delta.
In this case, CHECK/NOT NULL constraints on Delta. is correct. Enforced on write. This matches the core idea being tested around what is the primary purpose of constraints. The remaining choices fail because they don’t satisfy the full definition.
Q83. Which statement about constraints is most accurate?
Select an answer to check.
Answer: CHECK/NOT NULL constraints on Delta.
The best option here is CHECK/NOT NULL constraints on Delta.. Enforced on write. This matches the core idea being tested around which statement about constraints is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q84. How is constraints best characterized?
Select an answer to check.
Answer: CHECK/NOT NULL constraints on Delta.
For this question, CHECK/NOT NULL constraints on Delta. is correct. Enforced on write. This matches the core idea being tested around how is constraints best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q85. Which option best describes table properties?
Select an answer to check.
Answer: Set/get behaviors via TBLPROPERTIES.
Set/get behaviors via TBLPROPERTIES. is the correct answer here. Configure per table. This matches the core idea being tested around which option best describes table properties. The remaining choices fail because they don’t satisfy the full definition.
Q86. What is the primary purpose of table properties?
Select an answer to check.
Answer: Set/get behaviors via TBLPROPERTIES.
Here, Set/get behaviors via TBLPROPERTIES. is the right choice. Configure per table. That is exactly the concept behind what is the primary purpose of table properties in this context. The remaining choices fail because they don’t satisfy the full definition.
Q87. Which statement about table properties is most accurate?
Select an answer to check.
Answer: Set/get behaviors via TBLPROPERTIES.
In this case, Set/get behaviors via TBLPROPERTIES. is correct. Configure per table. That is exactly the concept behind which statement about table properties is most accurate in this context. The remaining choices fail because they don’t satisfy the full definition.
Q88. How is table properties best characterized?
Select an answer to check.
Answer: Set/get behaviors via TBLPROPERTIES.
The best option here is Set/get behaviors via TBLPROPERTIES.. Configure per table. That is exactly the concept behind how is table properties best characterized in this context. The remaining choices fail because they don’t satisfy the full definition.
Q89. Which option best describes DESCRIBE HISTORY?
Select an answer to check.
Answer: Show commit history of a table.
For this question, Show commit history of a table. is correct. Shows operation, version, user. That is exactly the concept behind which option best describes describe history in this context. The remaining choices fail because they don’t satisfy the full definition.
Q90. What is the primary purpose of DESCRIBE HISTORY?
Select an answer to check.
Answer: Show commit history of a table.
Show commit history of a table. is the correct answer here. Shows operation, version, user. That is exactly the concept behind what is the primary purpose of describe history in this context. The remaining choices fail because they don’t satisfy the full definition.
Q91. Which statement about DESCRIBE HISTORY is most accurate?
Select an answer to check.
Answer: Show commit history of a table.
Here, Show commit history of a table. is the right choice. Shows operation, version, user. It fits the requirement in the prompt about which statement about describe history is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q92. How is DESCRIBE HISTORY best characterized?
Select an answer to check.
Answer: Show commit history of a table.
In this case, Show commit history of a table. is correct. Shows operation, version, user. It fits the requirement in the prompt about how is describe history best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q93. Which option best describes RESTORE?
Select an answer to check.
Answer: Restore table to a prior version.
The best option here is Restore table to a prior version.. Reverts to a snapshot. It fits the requirement in the prompt about which option best describes restore. The remaining choices fail because they don’t satisfy the full definition.
Q94. What is the primary purpose of RESTORE?
Select an answer to check.
Answer: Restore table to a prior version.
For this question, Restore table to a prior version. is correct. Reverts to a snapshot. It fits the requirement in the prompt about what is the primary purpose of restore. The remaining choices fail because they don’t satisfy the full definition.
Q95. Which statement about RESTORE is most accurate?
Select an answer to check.
Answer: Restore table to a prior version.
Restore table to a prior version. is the correct answer here. Reverts to a snapshot. It fits the requirement in the prompt about which statement about restore is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q96. How is RESTORE best characterized?
Select an answer to check.
Answer: Restore table to a prior version.
Here, Restore table to a prior version. is the right choice. Reverts to a snapshot. This is the most accurate statement for how is restore best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q97. Which option best describes Delta vs Parquet alone?
Select an answer to check.
Answer: Delta adds ACID, time travel, schema enforcement.
In this case, Delta adds ACID, time travel, schema enforcement. is correct. Lakehouse benefits. This is the most accurate statement for which option best describes delta vs parquet alone. The remaining choices fail because they don’t satisfy the full definition.
Q98. What is the primary purpose of Delta vs Parquet alone?
Select an answer to check.
Answer: Delta adds ACID, time travel, schema enforcement.
The best option here is Delta adds ACID, time travel, schema enforcement.. Lakehouse benefits. This is the most accurate statement for what is the primary purpose of delta vs. The remaining choices fail because they don’t satisfy the full definition.
Q99. Which statement about Delta vs Parquet alone is most accurate?
Select an answer to check.
Answer: Delta adds ACID, time travel, schema enforcement.
For this question, Delta adds ACID, time travel, schema enforcement. is correct. Lakehouse benefits. This is the most accurate statement for which statement about delta vs parquet alone is. The remaining choices fail because they don’t satisfy the full definition.
Q100. How is Delta vs Parquet alone best characterized?
Select an answer to check.
Answer: Delta adds ACID, time travel, schema enforcement.
Delta adds ACID, time travel, schema enforcement. is the correct answer here. Lakehouse benefits. This is the most accurate statement for how is delta vs parquet alone best characterized. The remaining choices fail because they don’t satisfy the full definition.