Databricks Data Engineer Associate Question 229
Select 3A data engineering team is using Delta Lake to process and store critical transaction data. The team is concerned about ensuring data correctness, consistency, and the ability to handle concurrent writes and failures during job execution. How do ACID transactions in Delta Lake help address these concerns?
- A
ACID transactions ensure that concurrent writes do not lead to data corruption.
- B
ACID transactions allow data to be read even if a write operation is in progress.
- C
ACID transactions automatically optimize query performance without requiring manual intervention.
- D
ACID transactions guarantee that partial writes do not leave the data in an inconsistent state.
- E
ACID transactions enable rollback to the previous state in case of job failure or error.
Show answer and explanation
Correct answers: A, D, E
Explanation
ACID transactions in Delta Lake ensure data correctness and consistency by managing concurrent writes, preventing partial writes, and enabling rollback in case of errors. This guarantees reliable and accurate data processing, addressing common concerns in large-scale data engineering workflows.
- A. Correct.
Correct: ACID transactions ensure that multiple simultaneous writes are managed correctly and prevent data corruption by maintaining consistency and isolation.
- B. Incorrect.
Incorrect: While Delta Lake allows concurrent reads and writes, ACID transactions do not specifically guarantee data accessibility during an ongoing write operation.
- C. Incorrect.
Incorrect: Query optimization is not inherently part of ACID transactions; it is a separate capability often provided by the platform’s query engine.
- D. Correct.
Correct: ACID transactions ensure atomicity, meaning that partial writes are not allowed, preventing inconsistent states in the data.
- E. Correct.
Correct: ACID transactions provide durability and the ability to roll back to a consistent state in case of job failures or errors, ensuring data reliability.