Free Access AlibabaCloud.ACA-Database.v2022-08-06.q26 Practice Test (Page 6)

Question 21

Why is ApsaraDB for PolarDB better than other traditional database engines? (The number of answer: 3)

A.When you purchase a PolarDB cluster, you don't need to specify the storage capacity you want to purchase

B.PolarDB supports both OLTP and OLAP scenarios very well

C.The PolarDB database engine won't require you to replicate data when adding read-only nodes

D.ApsaraDB for PolarDB uses the pay-as-you-go billing method, therefore you only need to pay for the storage resources you actually use

Question 22

Which of the following statements about MongoDB is NOT true?

A.MongoDB is a document database.

B.MongoDB is a relational database.

C.MongoDB can be deployed in cluster mode.

D.MongoDB supports transactions.

Question 23

You are using DTS to migrate from a MySQL database installed on an ECS instance to a target database on RDS. In the DTS console, which of these is the correct "Instance Type" for the database?

A.ECS-based Databases

B.Express Connect DB

C.RDS Instance

D.ApsaraDB MongoDB

Question 24

Your DTS (Data Transmission Service) migration has failed halfway through: what options do you have? (Number of correct answers: 2)

A.Restart the migration task from the console

B.Delete your DTS instance and start over

C.Your database can't be migrated: you need to abandon the migration

D.You need to switch to ADAM, as DTS cannot complete the migration

Question 25

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 and incremental backup

B.Logical migration tools

C.Incremental backup only

D.Full backup only

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Question 21

Question 22

Question 23

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