Databricks Data Engineer Associate Question 232
Select 3A data engineering team is using Delta Lake in Databricks to manage their data pipeline. They need to ensure that concurrent read and write operations do not result in corrupted data and that users always see consistent and reliable results. Which benefits of ACID transactions in Delta Lake help achieve this?
- A
Ensures consistency by maintaining a single source of truth, even during concurrent operations
- B
Allows multiple users to write to the same Delta table simultaneously without any conflicts
- C
Provides atomicity, ensuring that either all parts of a transaction are committed or none at all
- D
Supports schema enforcement to automatically reject data that does not match the table’s schema
- E
Guarantees durability, ensuring that once a transaction is committed, the data is not lost
Show answer and explanation
Correct answers: A, C, E
Explanation
ACID transactions provide critical guarantees in Delta Lake that are essential for reliable data pipelines. Atomicity ensures that partial updates are avoided, consistency ensures a single source of truth, and durability protects committed data. These benefits allow data engineers to manage complex workflows with confidence, even in scenarios with concurrent operations.
- A. Correct.
This is correct because ACID transactions ensure consistency by maintaining a single source of truth, even when multiple operations happen concurrently.
- B. Incorrect.
This is incorrect. While Delta Lake supports ACID transactions, it does not allow unrestricted simultaneous writes. Write conflicts are detected and prevented.
- C. Correct.
This is correct because atomicity ensures that all parts of a transaction are applied together or not at all, preventing partial updates.
- D. Incorrect.
This is incorrect. While schema enforcement is a feature of Delta Lake, it is not directly related to ACID transactions.
- E. Correct.
This is correct because durability guarantees that once a transaction is committed, the changes are permanent and data is not lost.