Which of the following is the lowest recovery point objective (RPO) for Database Backup Service?

• A.Hours
• B.Days
• C.Seconds
• D.Minutes

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Which of the following are the core technologies behind Database Backup Service? (Number of correct answers: 3)

• A.High mount speeds (a few seconds)
• B.Multi-cloud and multi-backend backup
• C.Online query and analysis
• D.Real-time synchronization

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Each PolarDB cluster consists of one primary node and one or more read-only nodes. The system only support manually switch over services from the primary node to a read-only node.

• A.True
• B.False

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Which of the following are NOT true, regarding DTS (Data Transmission Service)? (Number of correct answers: 2)

• A.If the source database is not on Alibaba Cloud, it must be Internet accessible so that DTS can connect to it
• B.The source and destination database must use the same database engine
• C.The source and destination database must both have a database user which DTS can use
• D.DTS is designed for file synchronization

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Which of the following tasks cannot be completed by using Advanced Database & Application Migration (ADAM)?

• A.Data structure conversion
• B.De-Oracle workload evaluation
• C.Data migration
• D.Performance monitoring

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