Online Access Free ACA-Database Exam Questions

Which of the following are relational databases? (Number of correct answers: 5)

• A.MySQL
• B.Oracle
• C.SQL Server
• D.Redis
• E.HBase
• F.TSDB
• G.MariaDB
• H.MongoDB
• I.PostgreSQL

How can ApsaraDB for MyBase solve problems in database security and performance interferences in the multi-tenant scenario?

• A.Isolated hosts are used. A host runs only your instances and does not run instances of other users.
• B.Instances can be migrated. You can manually migrate instances to idle hosts.
• C.ApsaraDB for MyBase allows you to distribute different types of instances at a time.
• D.ApsaraDB for MyBase supports resource over commitment.

You want to migrate from MySQL to PostgreSQL: is this supported by DTS?

• A.You can migrate between MySQL and Oracle but not between PostgreSQL
• B.No, this type of migration isn't supported
• C.Yes, migration between different types of databases is supported by DTS

You need to migrate a database that has a storage capacity of 50 GB to the cloud and can tolerate a service downtime of half an hour. In this case, which of the following migration methods is the optimal choice to migrate data to the cloud in terms of stability and availability?

• A.Full backup only
• B.Incremental backup only
• C.Logical migration tools
• D.Full backup and incremental backup

Which of the following tools can be used to migrate an on-premises database to Alibaba Cloud while causing minimal service downtime?

• A.pg_basebackup
• B.pg_dump
• C.pg_restore
• D.pg_upgrade D.DTS