Question: Organizations considering Cloud Spanner often find ACID transactions valuable. What are ACID transactions?
- Autonomous, Centralized, Independent, Dependent
- Automatic, Constant Infrastructure, Decentralized
- Analog, Chronological, Intelligent, Database
- Atomic, Consistent, Isolated, Durable
Explanation
Cloud Spanner supports ACID transactions for reliable relational database operations at global scale. Atomicity ensures a transaction’s changes succeed together or fail together. Consistency keeps database rules valid before and after a transaction. Isolation protects concurrent transactions from interfering with each other, and durability preserves committed changes.
Why the other options are incorrect
Autonomous, Centralized, Independent, Dependent is not the recognized database transaction guarantee represented by ACID.
Automatic, Constant Infrastructure, Decentralized describes unrelated infrastructure ideas, not transaction behavior.
Analog, Chronological, Intelligent, Database is not a database consistency or transaction model.
Source for verification
https://cloud.google.com/spanner/docs/transactions
https://cloud.google.com/spanner/docs/true-time-external-consistency
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