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ACA-Database ACA Database Certification Question and Answers

Question # 4

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

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Question # 5

Which of the following architectures is not supported by ApsaraDB RDS for MySQL?

A.

The single-node Basic Edition architecture, which can be used in test and non-core production environments

B.

The high-avail ability architecture, in which primary and read-only nodes are deployed to implement automatic failovers

C.

The three-node Enterprise Edition architecture, which ensures zero data loss

D.

The serverless architecture, in which computing resources are charged based on the Pay-As-You-Go (PAYG) billing method

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Question # 6

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.

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

C.

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

database

D.

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

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Question # 7

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

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Question # 8

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

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Question # 9

When high availability switchovers occur in a database, which of the following features provided by ApsaraDB RDS for PostgreSQL can prevent the incremental data loss of logical subscriptions?

A.

Ganos

B.

Pase

C.

Slot failover

D.

High concurrency optimization

E.

Point-in-time restore

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Question # 10

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.

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Question # 11

Which of the following scheduling tools are supported by AnalyticDB for MySQL? (Number of correct answers: 2)

A.

DMS

B.

Data Works

C.

MaxCompute

D.

QuickBl

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Question # 12

What does DIM mean in data warehouse terms?

A.

Dimension table

B.

Operational data store (ODS)

C.

Common data model (CDM)

D.

Application data service (ADS)

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