ACA-Database 無料問題集「Alibaba Cloud ACA Database Certification」

（A）Millisecond-level latency in physical replication

（B）Large storage space

（C）Elastic scaling within minutes

（D）When you add a read-only node in an ApsaraDB for PolarDB cluster, you only need to pay for computing resources

（E）locked backup

（A）Compliance with PostgreSQL and Greenplum protocols

（B）Support for the SQL2003 syntax standard

（C）Fully compatible with Oracle syntax

（D）Support for the Java Database Connectivity (JDBC) protocol

（A）From a different cloud provider to Alibaba Cloud

（B）From RDS to an ECS-based database

（C）From an RDS database, back to itself

（D）From Alibaba Cloud RDS to other database systems

（A）False

（B）True

（A）False

（B）True

（A）SQL Server

（B）MySQL

（C）DB2

（D）PostreSQL

（A）Standalone instance

（B）Primary/secondary instance that consists of two nodes

（C）Replica set instance that consists of six nodes

（D）Sharded cluster instance

（E）Replica set instance that consists of three nodes

（A）Physical backup

（B）Snapshot backup

（C）Full backup

（D）Logical backup