Alibaba Cloud ACA Database Certification - ACA-Database Exam Questions [2026]

QUESTION NO: 1
Alibaba Cloud DTS (Data Transmission Service) can only migrate between databases that are hosted on RDS.

A. True B. False

Correct Answer: B

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 2
PolarDB for MySQL uses shared distributed storage and supports dual-zone deployment by default. How many data replicas are available across the two zones?

A. 6 B. 3 C. 5 D. 4

Correct Answer: A

QUESTION NO: 3
Which of the following is NOT supported by schema migration in Advanced Database & Application Migration (ADAM)?

A. Migrate the schemas that require a manual revision but have not been revised B. Re-migrate the failed schemas C. Customize schema migration D. Re-migrate all schemas

Correct Answer: A

QUESTION NO: 4
Which of the following is NOT true, regarding the sensitive data management feature provided by Data Management (DMS)?

A. The rules of field metadata and data content can be automatically recognized. B. De-identification algorithms can be managed. Multiple algorithms are supported, such as algorithms for masking specific positions and replacing fixed characters. C. After you configure de-identification algorithms, you can view the de-identified data. D. Field-level and row-level permissions are supported.

Correct Answer: C

QUESTION NO: 5
Alibaba Cloud DTS (Data Transmission Service) supports both full database migration and incremental synchronization.

A. True B. False

Correct Answer: A

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 6
Which are the supported DB engine for PolarDB so far? (The number of answer: 3)

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

Correct Answer: B,C,D

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 7
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. RDS Instance B. Express Connect DB C. ApsaraDB MongoDB D. ECS-based Databases

Correct Answer: A

Explanation: Only visible for Pass4Test members. You can sign-up / login (it's free).

QUESTION NO: 8
Which of the following are relational databases? (Number of correct answers: 5)

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

Correct Answer: A,C,F,G,I

QUESTION NO: 9
What is the maximum number of read-only nodes in a PolarDB cluster?

A. 10 B. 1 C. 5 D. 15

Correct Answer: D