Databricks Data Engineer Associate Question 234
Select 4You are working with a Delta Lake table in Databricks, and you want to ensure that a series of updates and deletes performed as part of a batch job meet ACID compliance requirements. Which of the following guarantees provided by Delta Lake validate that it is ACID-compliant?
- A
Atomicity ensures that either all operations in a transaction succeed, or none of them are applied.
- B
Consistency ensures that the database remains in a valid state before and after the transaction.
- C
Isolation ensures that multiple transactions can be executed concurrently without interfering with each other.
- D
Durability ensures that once a transaction is committed, the changes are permanently stored, even in case of a failure.
- E
Delta Lake supports eventual consistency, which allows updates to propagate asynchronously.
Show answer and explanation
Correct answers: A, B, C, D
Explanation
ACID compliance in Delta Lake is achieved through guarantees of Atomicity, Consistency, Isolation, and Durability. These properties ensure that transactions are reliable, consistent, and resilient to failures. Delta Lake does not support eventual consistency, as this is not aligned with the strict guarantees of ACID compliance.
- A. Correct.
Atomicity is an essential part of ACID compliance, ensuring that all operations in a transaction are treated as a single unit.
- B. Correct.
Consistency ensures that the database remains valid and adheres to predefined rules before and after a transaction, which is critical for ACID compliance.
- C. Correct.
Isolation is a key component of ACID compliance, ensuring that transactions do not interfere with one another and prevent data corruption.
- D. Correct.
Durability is critical for ACID compliance, as it guarantees that committed transactions persist even in the event of a failure.
- E. Incorrect.
Eventual consistency is not part of ACID compliance; it pertains to eventually consistent systems like distributed NoSQL databases, which do not guarantee strict consistency immediately.