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Alibaba ACA-Database Exam
ACA Database Exam (Page 8 )

Updated On: 26-Jan-2026
Page 3 of 17
PDF with 80 Questions

Suppose you are using MySQL currently, if you want to migrate to cloud native database PolarDB with little effort, which one is the best choice?

  1. PolarDB MySQL
  2. PolarDB PosgreSQL
  3. PolarDB Oracle
  4. PolarDB Box

Answer(s): A


Reference:

https://www.alibabacloud.com/help/doc-
detail/58768.htm?spm=a2c63.l28256.b99.10.71ce3784cXj0y8



What is the maximum storage size that PolarDB currently provides?

  1. 1TB
  2. 10TB
  3. 50TB
  4. 100TB

Answer(s): D


Reference:

https://www.alibabacloud.com/product/polardb



Which database utility is good for database management and DevOps?

  1. DMS
  2. DBS
  3. DTS
  4. DAS
  5. ADAM

Answer(s): A


Reference:

https://www.alibabacloud.com/product/data-management-service /https://www.alibabacloud.com/help/doc-
detail/190124.htm?spm=a2c63.p38356.b99.40.6ad93d19Xe9h14



Which of the following is the wrong statement about PolarDB design architecture?

  1. A PolarDB cluster contains one primary instance and up to 15 read-only instances
  2. PolarDB consolidate compute processes and storage processes in one box, allowing the database capacity to scale up and down to meet your application needs in Alibaba Cloud
  3. Read/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for your database
  4. High speed network connection is enabled between the DB server and the chunk server, and data are transferred using the Remote Direct Memory Access (RDMA) protocol

Answer(s): B


Reference:

https://www.alibabacloud.com/help/doc-
detail/58766.htm?spm=a2c63.p38356.b99.11.4e333181dMpFmV



Which of the following statements is NOT correct about PolarDB?

  1. ApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines
  2. Each ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)
  3. ApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency
  4. An ApsaraDB for PolarDB cluster can also be scaled out to a maximum of 16 nodes, and provide up to 6 times of performance improvement traditional MySQL clusters at a 30% to 50% cost reduction
  5. ApsaraDB for PolarDB is designed to handle large amounts of sequential queries

Answer(s): E

Explanation:

PolarDB is 6 times faster than standard MySQL database in handling large amounts of concurrent queries.


Reference:

https://www.alibabacloud.com/product/polardb



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