QUESTION: 21

Assume that a company uses ApsaraDB for PolarDB. The company commonly queries users based on their basic information, including: addresses, company names, and ID numbers. In this scenario, what is the best practice for creating a database index (or indexes)?

Create a b-tree index on each column to be searched.
Create a hash index on each column to be searched.
Create a gin index for multiple fields.
Create a gist index for multiple fields.

Answer(s): A

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QUESTION: 22

On which operating systems can you install Alibaba Cloud command line tools? (Number of correct answers: 3)

Windows
Linux
macOS
Android

Answer(s): A,B,C

Reference:

https://www.alibabacloud.com/blog/how-to-manage-your-alibaba-cloud-linux- server-from-the-command-line-interface-%28cli%29_593878

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QUESTION: 23

A development team currently supports an application that is designed to be deployed on a single server's local memory As part of migrating to Alibaba Cloud, the team needs to use Auto Scaling, and must therefore move their game state data off of their servers, so that they can automatically scale up and down without losing game data.

Where should the team store these game results to best allow for consistent results without impacting performance?

OSS
RDS
Redis
Log Service

Answer(s): C

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QUESTION: 24

To meet data analytics requirements on large datasets, which of these databases can meet the demand for structured and semi-structured storage for almost all types of data, albeit with limited support for strong transactions?

HBase
OceanBase
RDSMariaDB
TSDB

Answer(s): C

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Free ACA-Developer Exam Braindumps (page: 7)

QUESTION: 21

QUESTION: 22

Reference:

QUESTION: 23

QUESTION: 24

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