Which of the following types of data that is stored in PostgreSQL databases can support the one-to-many data model? (Number of correct answers: 3)

• A.JSON
• B.JSONB
• C.Range
• D.String
• E.GIS
• F.Cube
• G.Array

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Which are the supported DB engine for PolarDB so far? (The number of answer: 3)

• A.PolarDB for Mysql
• B.PolarDB for Postgres
• C.PolarDB for SQLserver
• D.PolarDB for Oracle

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From which of the following data sources or databases can Data Lake Analytics (DLA) read data for analysis?
(Number of correct answers: 6)

• A.OSS
• B.MySQL
• C.HOLO
• D.Oracle
• E.MongoDB
• F.OTS
• G.AnolyticDB

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PolarDB for MySQL allows you to deploy a cluster across multiple zones. Compared with single-zone clusters, multi-zone clusters have better disaster recovery capabilities and can withstand data centre-level faults.

• A.False
• B.True

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You have a client that wants to move from another cloud provider's database service to RDS. Which of these is the best way to move their database to Alibaba Cloud?

• A.Migrate the entire VM hosting the database
• B.Use DTS (Data Transmission Service)
• C.This type of migration isn't possible
• D.Make a full physical backup of their database and copy it into OSS

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