Alibaba Cloud ACA-Database Actual Free Exam Questions & Community Discussion

Exam Code/Number: ACA-Database
Exam Name/Title: ACA Database Certification
Certification Provider: Alibaba Cloud
Corresponding Certification: Alibaba Database

Exam Questions: 82
Updated On: Jun 01, 2026

Question #19

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. MongoDB

C. HOLO

D. OTS

E. MySQL

F. AnolyticDB

G. Oracle

Discussion 0

Correct Answer: A,B,D,E,F,G Vote an answer

Question #20

Which of the following specifications of AnalyticDB supports tiered storage of cold and hot data?

A. Elastic Mode

B. C series

C. Basic Edition

D. S series

Discussion 0

Correct Answer: A Vote an answer

Question #21

Which of the following types of data are most suitable for storage in MySQL databases?

A. Structured data in rows and columns

B. Key-value (KV) data that is frequently read and written

C. Large amounts of time series data

D. Document-oriented unstructured data

Discussion 0

Correct Answer: A Vote an answer

Question #22

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

A. A PolarDB cluster contains one primary instance and up to 15 read-only instances

B. 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

C. Read/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for your database

D. 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

Discussion 0

Correct Answer: D Vote an answer

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Question #23

PolarDB for MySQL archive databases use log-structured merge-trees (LSM trees) and the Zstandard (ZSTD) data compression algorithm to increase the data compression ratio. How much storage can be saved, at most?

A. 70%

B. 40%

C. 60%

D. 50%

Discussion 0

Correct Answer: A Vote an answer

Question #24

Which of the following features determines high performance of the performance-enhanced instances of ApsaraDB for Redis Enhanced Edition (Tair)?

A. Data flashback

B. Multithreading

C. Extended data structure modules

D. Global Replica

Discussion 0

Correct Answer: D Vote an answer

Question #25

Which of the following are database architectures which have emerged during the evolution of database systems? (Number of correct answers: 3)

A. Shared Everything

B. Shared Nothing

C. Dedicated

D. Single Instance

Discussion 0

Correct Answer: A,B,C Vote an answer

Question #26

Which of the following is the most efficient backup in ApsaraDB for MongoDB?

A. Physical backup

B. Snapshot backup

C. Logical backup

D. Full backup

Discussion 0

Correct Answer: A Vote an answer

Question #27

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. Field-level and row-level permissions are supported.

D. After you configure de-identification algorithms, you can view the de-identified data.

Discussion 0

Correct Answer: D Vote an answer

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