You can purchase more read-only nodes after you have created a cluster. If the primary node fails, the system automatically promotes the read-only node with the highest failover priority to become the new primary node while restoring the faulty node.
A. True
B. False
Which of the following are the benefits of database views? (Number of correct answers: 3)
A. Simplicity for queries
B. Simplicity in structure: presents the database as a set of virtual tables specific to particular users or groups of users
C. Easier for data visualization
D. Stabilization of information: presents a consistent, unchanged image of the database structure
Which of the following is NOT supported by schema migration in Advanced Database and Application Migration (ADAM)?
A. Re-migrate all schemas
B. Re-migrate the failed schemas
C. Migrate the schemas that require a manual revision but have not been revised
D. Customize schema migration
Which of the following is NOT true, regarding DTS (Database Transmission Service)?
A. DTS cannot be used for incremental database synchronization
B. DTS supports multiple database engines
C. DTS can migrate both data and table schema
D. DTS works for database both on and off Alibaba Cloud
Which of the following are database architectures which have emerged during the evolution of database systems? (Number of correct answers: 3)
A. Single Instance
B. Shared Nothing
C. Shared Everything
D. Dedicated
Which of the following are reasonable Data Transmission Service (DTS) use cases? (Number of correct answers: 4)
A. Database migration without interrupting services / downtime
B. Geo-disaster recovery and active geo-redundancy for databases
C. Synchronizing data to data warehouses in real time to build data warehouses for real- time analytics.
D. Configuring data audit rules to manage data quality.
E. Synchronizing information about user accounts and permissions.
F. Change tracking and data distribution.
Alibaba Cloud DTS (Data Transmission Service) can only migrate between databases that are hosted on RDS.
A. True
B. False
What is the maximum number of read-only nodes in a PolarDB cluster?
A. 1
B. 5
C. 10
D. 15
Which of the following architectures are supported by ApsaraDB for Redis Enhanced Edition (Tair)? (Number of correct answers: 3) A. Master-replica architecture in which standard master-replica instances are deployed
B. Read/write splitting architecture in which standard master-replica instances are deployed
C. Cluster master-replica instances
D. Single-node architecture
Which of the followings is NOT a correct way to connect to PolarDB?
A. Use the command line like 'mysql' to connect to a cluster
B. Use DMS to connect to a cluster
C. Use a client like HeidiSQL to connect to a cluster
D. Use PolarDB console to log into a cluster
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