Data ETL Data Warehouse Modeling MCQ Questions with Answers – Page 2 (Latest 2026)

Q51. Which statement about conformed dimensions is most accurate?

A. Per-mart unique dims. B. Shared dims used across facts/marts. C. Pure star only. D. Pure local dims only.

Select an answer to check.

Answer: Shared dims used across facts/marts.

Here, Shared dims used across facts/marts. is the right choice. Enable cross-mart analysis. It aligns directly with what the question asks about which statement about conformed dimensions is most accurate. Competing choices sound plausible, but they miss the key condition.

Q52. How is conformed dimensions best characterized?

A. Per-mart unique dims. B. Pure local dims only. C. Pure star only. D. Shared dims used across facts/marts.

Select an answer to check.

Answer: Shared dims used across facts/marts.

In this case, Shared dims used across facts/marts. is correct. Enable cross-mart analysis. It aligns directly with what the question asks about how is conformed dimensions best characterized. Competing choices sound plausible, but they miss the key condition.

Q53. Which option best describes Type 1 SCD?

A. Overwrite changing attributes; no history. B. Type 0 SCD. C. Type 2 SCD. D. Type 3 SCD.

Select an answer to check.

Answer: Overwrite changing attributes; no history.

The best option here is Overwrite changing attributes; no history.. Simplest; loses history. It aligns directly with what the question asks about which option best describes type 1 scd. Competing choices sound plausible, but they miss the key condition.

Q54. What is the primary purpose of Type 1 SCD?

A. Type 0 SCD. B. Type 3 SCD. C. Type 2 SCD. D. Overwrite changing attributes; no history.

Select an answer to check.

Answer: Overwrite changing attributes; no history.

For this question, Overwrite changing attributes; no history. is correct. Simplest; loses history. It aligns directly with what the question asks about what is the primary purpose of type 1. Competing choices sound plausible, but they miss the key condition.

Q55. Which statement about Type 1 SCD is most accurate?

A. Type 3 SCD. B. Overwrite changing attributes; no history. C. Type 0 SCD. D. Type 2 SCD.

Select an answer to check.

Answer: Overwrite changing attributes; no history.

Overwrite changing attributes; no history. is the correct answer here. Simplest; loses history. It aligns directly with what the question asks about which statement about type 1 scd is most. Competing choices sound plausible, but they miss the key condition.

Q56. How is Type 1 SCD best characterized?

A. Overwrite changing attributes; no history. B. Type 2 SCD. C. Type 3 SCD. D. Type 0 SCD.

Select an answer to check.

Answer: Overwrite changing attributes; no history.

Here, Overwrite changing attributes; no history. is the right choice. Simplest; loses history. This matches the core idea being tested around how is type 1 scd best characterized. Competing choices sound plausible, but they miss the key condition.

Q57. Which option best describes Type 2 SCD?

A. Type 0. B. New row per change with effective dates. C. Pure overwrite. D. Type 1.

Select an answer to check.

Answer: New row per change with effective dates.

In this case, New row per change with effective dates. is correct. Preserves history. This matches the core idea being tested around which option best describes type 2 scd. Competing choices sound plausible, but they miss the key condition.

Q58. What is the primary purpose of Type 2 SCD?

A. Type 1. B. Type 0. C. Pure overwrite. D. New row per change with effective dates.

Select an answer to check.

Answer: New row per change with effective dates.

The best option here is New row per change with effective dates.. Preserves history. This matches the core idea being tested around what is the primary purpose of type 2. Competing choices sound plausible, but they miss the key condition.

Q59. Which statement about Type 2 SCD is most accurate?

A. Pure overwrite. B. Type 1. C. New row per change with effective dates. D. Type 0.

Select an answer to check.

Answer: New row per change with effective dates.

For this question, New row per change with effective dates. is correct. Preserves history. This matches the core idea being tested around which statement about type 2 scd is most. Competing choices sound plausible, but they miss the key condition.

Q60. How is Type 2 SCD best characterized?

A. Type 0. B. Pure overwrite. C. Type 1. D. New row per change with effective dates.

Select an answer to check.

Answer: New row per change with effective dates.

New row per change with effective dates. is the correct answer here. Preserves history. This matches the core idea being tested around how is type 2 scd best characterized. Competing choices sound plausible, but they miss the key condition.

Q61. Which option best describes Type 3 SCD?

A. Add prior-value column to track limited history. B. Type 2. C. Pure overwrite. D. Type 1.

Select an answer to check.

Answer: Add prior-value column to track limited history.

Here, Add prior-value column to track limited history. is the right choice. Limited history depth. That is exactly the concept behind which option best describes type 3 scd in this context. Competing choices sound plausible, but they miss the key condition.

Q62. What is the primary purpose of Type 3 SCD?

A. Pure overwrite. B. Type 2. C. Add prior-value column to track limited history. D. Type 1.

Select an answer to check.

Answer: Add prior-value column to track limited history.

In this case, Add prior-value column to track limited history. is correct. Limited history depth. That is exactly the concept behind what is the primary purpose of type 3 in this context. Competing choices sound plausible, but they miss the key condition.

Q63. Which statement about Type 3 SCD is most accurate?

A. Type 1. B. Type 2. C. Add prior-value column to track limited history. D. Pure overwrite.

Select an answer to check.

Answer: Add prior-value column to track limited history.

The best option here is Add prior-value column to track limited history.. Limited history depth. That is exactly the concept behind which statement about type 3 scd is most in this context. Competing choices sound plausible, but they miss the key condition.

Q64. How is Type 3 SCD best characterized?

A. Add prior-value column to track limited history. B. Type 2. C. Pure overwrite. D. Type 1.

Select an answer to check.

Answer: Add prior-value column to track limited history.

For this question, Add prior-value column to track limited history. is correct. Limited history depth. That is exactly the concept behind how is type 3 scd best characterized in this context. Competing choices sound plausible, but they miss the key condition.

Q65. Which option best describes a surrogate key?

A. A natural key. B. A primary index. C. A composite key only. D. Synthetic numeric key for dim rows.

Select an answer to check.

Answer: Synthetic numeric key for dim rows.

Synthetic numeric key for dim rows. is the correct answer here. Stable across changes. That is exactly the concept behind which option best describes a surrogate key in this context. Competing choices sound plausible, but they miss the key condition.

Q66. What is the primary purpose of a surrogate key?

A. A composite key only. B. A primary index. C. A natural key. D. Synthetic numeric key for dim rows.

Select an answer to check.

Answer: Synthetic numeric key for dim rows.

Here, Synthetic numeric key for dim rows. is the right choice. Stable across changes. It fits the requirement in the prompt about what is the primary purpose of a surrogate. Competing choices sound plausible, but they miss the key condition.

Q67. Which statement about a surrogate key is most accurate?

A. A natural key. B. Synthetic numeric key for dim rows. C. A primary index. D. A composite key only.

Select an answer to check.

Answer: Synthetic numeric key for dim rows.

In this case, Synthetic numeric key for dim rows. is correct. Stable across changes. It fits the requirement in the prompt about which statement about a surrogate key is most. Competing choices sound plausible, but they miss the key condition.

Q68. How is a surrogate key best characterized?

A. A primary index. B. A composite key only. C. A natural key. D. Synthetic numeric key for dim rows.

Select an answer to check.

Answer: Synthetic numeric key for dim rows.

The best option here is Synthetic numeric key for dim rows.. Stable across changes. It fits the requirement in the prompt about how is a surrogate key best characterized. Competing choices sound plausible, but they miss the key condition.

Q69. Which option best describes a natural key?

A. A pure FK. B. Real-world business key. C. A surrogate key. D. A pure index.

Select an answer to check.

Answer: Real-world business key.

For this question, Real-world business key. is correct. Used to identify entities. It fits the requirement in the prompt about which option best describes a natural key. Competing choices sound plausible, but they miss the key condition.

Q70. What is the primary purpose of a natural key?

A. A pure index. B. Real-world business key. C. A pure FK. D. A surrogate key.

Select an answer to check.

Answer: Real-world business key.

Real-world business key. is the correct answer here. Used to identify entities. It fits the requirement in the prompt about what is the primary purpose of a natural. Competing choices sound plausible, but they miss the key condition.

Q71. Which statement about a natural key is most accurate?

A. Real-world business key. B. A pure FK. C. A surrogate key. D. A pure index.

Select an answer to check.

Answer: Real-world business key.

Here, Real-world business key. is the right choice. Used to identify entities. This is the most accurate statement for which statement about a natural key is most. Competing choices sound plausible, but they miss the key condition.

Q72. How is a natural key best characterized?

A. A surrogate key. B. A pure FK. C. A pure index. D. Real-world business key.

Select an answer to check.

Answer: Real-world business key.

In this case, Real-world business key. is correct. Used to identify entities. This is the most accurate statement for how is a natural key best characterized. Competing choices sound plausible, but they miss the key condition.

Q73. Which option best describes a slowly changing fact?

A. Pure append-only fact. B. Fact rows updated rather than appended. C. A periodic snapshot. D. A transaction fact.

Select an answer to check.

Answer: Fact rows updated rather than appended.

The best option here is Fact rows updated rather than appended.. Used in some scenarios. This is the most accurate statement for which option best describes a slowly changing fact. Competing choices sound plausible, but they miss the key condition.

Q74. What is the primary purpose of a slowly changing fact?

A. A periodic snapshot. B. A transaction fact. C. Fact rows updated rather than appended. D. Pure append-only fact.

Select an answer to check.

Answer: Fact rows updated rather than appended.

For this question, Fact rows updated rather than appended. is correct. Used in some scenarios. This is the most accurate statement for what is the primary purpose of a slowly. Competing choices sound plausible, but they miss the key condition.

Q75. Which statement about a slowly changing fact is most accurate?

A. Fact rows updated rather than appended. B. A transaction fact. C. Pure append-only fact. D. A periodic snapshot.

Select an answer to check.

Answer: Fact rows updated rather than appended.

Fact rows updated rather than appended. is the correct answer here. Used in some scenarios. This is the most accurate statement for which statement about a slowly changing fact is. Competing choices sound plausible, but they miss the key condition.

Q76. How is a slowly changing fact best characterized?

A. A transaction fact. B. Fact rows updated rather than appended. C. Pure append-only fact. D. A periodic snapshot.

Select an answer to check.

Answer: Fact rows updated rather than appended.

Here, Fact rows updated rather than appended. is the right choice. Used in some scenarios. It aligns directly with what the question asks about how is a slowly changing fact best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q77. Which option best describes a transactional fact?

A. Periodic snapshot. B. Accumulating snapshot. C. Slowly changing fact. D. Row per atomic event.

Select an answer to check.

Answer: Row per atomic event.

In this case, Row per atomic event. is correct. Most common fact type. It aligns directly with what the question asks about which option best describes a transactional fact. The remaining choices fail because they don’t satisfy the full definition.

Q78. What is the primary purpose of a transactional fact?

A. Slowly changing fact. B. Periodic snapshot. C. Accumulating snapshot. D. Row per atomic event.

Select an answer to check.

Answer: Row per atomic event.

The best option here is Row per atomic event.. Most common fact type. It aligns directly with what the question asks about what is the primary purpose of a transactional. The remaining choices fail because they don’t satisfy the full definition.

Q79. Which statement about a transactional fact is most accurate?

A. Accumulating snapshot. B. Periodic snapshot. C. Slowly changing fact. D. Row per atomic event.

Select an answer to check.

Answer: Row per atomic event.

For this question, Row per atomic event. is correct. Most common fact type. It aligns directly with what the question asks about which statement about a transactional fact is most. The remaining choices fail because they don’t satisfy the full definition.

Q80. How is a transactional fact best characterized?

A. Row per atomic event. B. Periodic snapshot. C. Accumulating snapshot. D. Slowly changing fact.

Select an answer to check.

Answer: Row per atomic event.

Row per atomic event. is the correct answer here. Most common fact type. It aligns directly with what the question asks about how is a transactional fact best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q81. Which option best describes a periodic snapshot?

A. Transactional fact. B. Row per period (daily/monthly). C. Slowly changing fact. D. Accumulating snapshot.

Select an answer to check.

Answer: Row per period (daily/monthly).

Here, Row per period (daily/monthly). is the right choice. Useful for inventories. This matches the core idea being tested around which option best describes a periodic snapshot. The remaining choices fail because they don’t satisfy the full definition.

Q82. What is the primary purpose of a periodic snapshot?

A. Accumulating snapshot. B. Slowly changing fact. C. Row per period (daily/monthly). D. Transactional fact.

Select an answer to check.

Answer: Row per period (daily/monthly).

In this case, Row per period (daily/monthly). is correct. Useful for inventories. This matches the core idea being tested around what is the primary purpose of a periodic. The remaining choices fail because they don’t satisfy the full definition.

Q83. Which statement about a periodic snapshot is most accurate?

A. Transactional fact. B. Slowly changing fact. C. Row per period (daily/monthly). D. Accumulating snapshot.

Select an answer to check.

Answer: Row per period (daily/monthly).

The best option here is Row per period (daily/monthly).. Useful for inventories. This matches the core idea being tested around which statement about a periodic snapshot is most. The remaining choices fail because they don’t satisfy the full definition.

Q84. How is a periodic snapshot best characterized?

A. Slowly changing fact. B. Row per period (daily/monthly). C. Accumulating snapshot. D. Transactional fact.

Select an answer to check.

Answer: Row per period (daily/monthly).

For this question, Row per period (daily/monthly). is correct. Useful for inventories. This matches the core idea being tested around how is a periodic snapshot best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q85. Which option best describes an accumulating snapshot?

A. Transactional fact. B. Slowly changing fact. C. Periodic snapshot. D. Track milestones in a process.

Select an answer to check.

Answer: Track milestones in a process.

Track milestones in a process. is the correct answer here. Updated as steps complete. This matches the core idea being tested around which option best describes an accumulating snapshot. The remaining choices fail because they don’t satisfy the full definition.

Q86. What is the primary purpose of an accumulating snapshot?

A. Track milestones in a process. B. Slowly changing fact. C. Transactional fact. D. Periodic snapshot.

Select an answer to check.

Answer: Track milestones in a process.

Here, Track milestones in a process. is the right choice. Updated as steps complete. That is exactly the concept behind what is the primary purpose of an accumulating in this context. The remaining choices fail because they don’t satisfy the full definition.

Q87. Which statement about an accumulating snapshot is most accurate?

A. Transactional fact. B. Periodic snapshot. C. Track milestones in a process. D. Slowly changing fact.

Select an answer to check.

Answer: Track milestones in a process.

In this case, Track milestones in a process. is correct. Updated as steps complete. That is exactly the concept behind which statement about an accumulating snapshot is most in this context. The remaining choices fail because they don’t satisfy the full definition.

Q88. How is an accumulating snapshot best characterized?

A. Transactional fact. B. Track milestones in a process. C. Periodic snapshot. D. Slowly changing fact.

Select an answer to check.

Answer: Track milestones in a process.

The best option here is Track milestones in a process.. Updated as steps complete. That is exactly the concept behind how is an accumulating snapshot best characterized in this context. The remaining choices fail because they don’t satisfy the full definition.

Q89. Which option best describes the bus matrix?

A. A pure SQL plan. B. A pure star schema. C. Mapping of conformed dims to facts. D. A pure ER diagram.

Select an answer to check.

Answer: Mapping of conformed dims to facts.

For this question, Mapping of conformed dims to facts. is correct. Kimball planning tool. That is exactly the concept behind which option best describes the bus matrix in this context. The remaining choices fail because they don’t satisfy the full definition.

Q90. What is the primary purpose of the bus matrix?

A. A pure ER diagram. B. A pure SQL plan. C. A pure star schema. D. Mapping of conformed dims to facts.

Select an answer to check.

Answer: Mapping of conformed dims to facts.

Mapping of conformed dims to facts. is the correct answer here. Kimball planning tool. That is exactly the concept behind what is the primary purpose of the bus in this context. The remaining choices fail because they don’t satisfy the full definition.

Q91. Which statement about the bus matrix is most accurate?

A. A pure star schema. B. Mapping of conformed dims to facts. C. A pure SQL plan. D. A pure ER diagram.

Select an answer to check.

Answer: Mapping of conformed dims to facts.

Here, Mapping of conformed dims to facts. is the right choice. Kimball planning tool. It fits the requirement in the prompt about which statement about the bus matrix is most. The remaining choices fail because they don’t satisfy the full definition.

Q92. How is the bus matrix best characterized?

A. Mapping of conformed dims to facts. B. A pure star schema. C. A pure ER diagram. D. A pure SQL plan.

Select an answer to check.

Answer: Mapping of conformed dims to facts.

In this case, Mapping of conformed dims to facts. is correct. Kimball planning tool. It fits the requirement in the prompt about how is the bus matrix best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q93. Which option best describes the data vault?

A. A pure star schema. B. A pure snowflake. C. Hubs, links, satellites for raw history. D. A pure 3NF.

Select an answer to check.

Answer: Hubs, links, satellites for raw history.

The best option here is Hubs, links, satellites for raw history.. Adapts to change well. It fits the requirement in the prompt about which option best describes the data vault. The remaining choices fail because they don’t satisfy the full definition.

Q94. What is the primary purpose of the data vault?

A. A pure star schema. B. A pure 3NF. C. A pure snowflake. D. Hubs, links, satellites for raw history.

Select an answer to check.

Answer: Hubs, links, satellites for raw history.

For this question, Hubs, links, satellites for raw history. is correct. Adapts to change well. It fits the requirement in the prompt about what is the primary purpose of the data. The remaining choices fail because they don’t satisfy the full definition.

Q95. Which statement about the data vault is most accurate?

A. A pure 3NF. B. A pure star schema. C. Hubs, links, satellites for raw history. D. A pure snowflake.

Select an answer to check.

Answer: Hubs, links, satellites for raw history.

Hubs, links, satellites for raw history. is the correct answer here. Adapts to change well. It fits the requirement in the prompt about which statement about the data vault is most. The remaining choices fail because they don’t satisfy the full definition.

Q96. How is the data vault best characterized?

A. Hubs, links, satellites for raw history. B. A pure star schema. C. A pure snowflake. D. A pure 3NF.

Select an answer to check.

Answer: Hubs, links, satellites for raw history.

Here, Hubs, links, satellites for raw history. is the right choice. Adapts to change well. This is the most accurate statement for how is the data vault best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q97. Which option best describes 3NF for OLAP?

A. Highly normalized; less suited for analytics. B. Star schema. C. Data vault. D. Snowflake schema.

Select an answer to check.

Answer: Highly normalized; less suited for analytics.

In this case, Highly normalized; less suited for analytics. is correct. OLTP-friendly; OLAP often denormalized. This is the most accurate statement for which option best describes 3nf for olap. The remaining choices fail because they don’t satisfy the full definition.

Q98. What is the primary purpose of 3NF for OLAP?

A. Data vault. B. Highly normalized; less suited for analytics. C. Star schema. D. Snowflake schema.

Select an answer to check.

Answer: Highly normalized; less suited for analytics.

The best option here is Highly normalized; less suited for analytics.. OLTP-friendly; OLAP often denormalized. This is the most accurate statement for what is the primary purpose of 3nf for. The remaining choices fail because they don’t satisfy the full definition.

Q99. Which statement about 3NF for OLAP is most accurate?

A. Highly normalized; less suited for analytics. B. Data vault. C. Star schema. D. Snowflake schema.

Select an answer to check.

Answer: Highly normalized; less suited for analytics.

For this question, Highly normalized; less suited for analytics. is correct. OLTP-friendly; OLAP often denormalized. This is the most accurate statement for which statement about 3nf for olap is most. The remaining choices fail because they don’t satisfy the full definition.

Q100. How is 3NF for OLAP best characterized?

A. Highly normalized; less suited for analytics. B. Star schema. C. Snowflake schema. D. Data vault.

Select an answer to check.

Answer: Highly normalized; less suited for analytics.

Highly normalized; less suited for analytics. is the correct answer here. OLTP-friendly; OLAP often denormalized. This is the most accurate statement for how is 3nf for olap best characterized. The remaining choices fail because they don’t satisfy the full definition.