Alibaba Cloud ACA-DATABASE Online Practice Questions and Exam Preparation

Alibaba Cloud ACA-DATABASE Online Questions & Answers

• Question 61:

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

  A. Extended data structure modules
  B. Multithreading
  C. Global Replica
  D. Data flashback
  C. Global Replica

• Question 62:

  Which of the following is NOT true, regarding DTS (Database Transmission Service)?

  A. DTS cannot be used for incremental database synchronization
  B. DTS supports multiple database engines
  C. DTS can migrate both data and table schema
  D. DTS works for database both on and off Alibaba Cloud
  A. DTS cannot be used for incremental database synchronization

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  Explanation/Reference:

  https://www.alibabacloud.com/help/doc-detail/56776.htm?spm=a2c63.p38356.b99.181.74896b5dro6cDo

• Question 63:

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

  A. Basic Edition
  B. C series
  C. S series
  D. Elastic Mode
  D. Elastic Mode

• Question 64:

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

  A. Single Instance
  B. Shared Nothing
  C. Shared Everything
  D. Dedicated
  B. Shared Nothing
  C. Shared Everything
  D. Dedicated

• Question 65:

  Which migration modes are supported by DTS (Data Transmission Service)? (Number of correct answer: 3)

  A. From Alibaba Cloud RDS to other database systems
  B. From RDS to an ECS-based database
  C. From a different cloud provider to Alibaba Cloud
  D. From an RDS database, back to itself
  A. From Alibaba Cloud RDS to other database systems

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  Explanation/Reference:

  For database backup use DBS. https://www.alibabacloud.com/help/docdetail/59133.htm?spm=a2c63.l28256.b99.3.467e7530gZ9M6o

• Question 66:

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

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

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  Explanation/Reference:

  https://www.alibabacloud.com/help/doc- detail/176064.htm?spm=a2c63.p38356.b99.7.3191591dPlcLJa

• Question 67:

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

• Question 68:

  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?

  A. PolarDB MySQL
  B. PolarDB PosgreSQL
  C. PolarDB Oracle
  D. PolarDB Box
  A. PolarDB MySQL

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  Explanation/Reference:

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

• Question 69:

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

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

• Question 70:

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