PROFESSIONAL-CLOUD-DATABASE-ENGINEER · Question #138
Which Google Cloud database offers strongly consistent transactions, supports both relational and JSON data, and delivers globally distributed low latency across three continents?
The correct answer is B. Cloud Spanner multi region. Cloud Spanner multi-region is the only Google Cloud database that simultaneously delivers: (1) externally consistent (strongly consistent) distributed transactions via TrueTime, (2) a SQL-relational schema with JSON column support, and (3) multi-region replication across three…
Question
Which Google Cloud database offers strongly consistent transactions, supports both relational and JSON data, and delivers globally distributed low latency across three continents?
Options
- AAlloyDB for PostgreSQL
- BCloud Spanner multi region
- CBigtable
- DCloud SQL for PostgreSQL
How the community answered
(30 responses)- A3% (1)
- B87% (26)
- C3% (1)
- D7% (2)
Explanation
Cloud Spanner multi-region is the only Google Cloud database that simultaneously delivers: (1) externally consistent (strongly consistent) distributed transactions via TrueTime, (2) a SQL-relational schema with JSON column support, and (3) multi-region replication across three or more continents with single-digit millisecond reads at each region. AlloyDB is a high-performance PostgreSQL service but is regional, not globally distributed. Bigtable is a wide-column NoSQL store that does not provide ACID transactions across rows. Cloud SQL for PostgreSQL is also regional and lacks global replication.
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