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Alibaba Cloud ACA-Database ACA Database Certification Exam Practice Test

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Total 80 questions
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ACA Database Certification Questions and Answers

Question 1

With ApsaraDB for MyBase, problems caused by a sudden spike in traffic are automatically resolved. How is this done?

Options:

A.

ApsaraDB for My Base allows you to deploy different types of instances in a cluster.

B.

ApsaraDB for MyBase grants you host permissions. You can log on to hosts to troubleshoot business problems in an emergency.

C.

ApsaraDB for MyBase supports the over commitment of CPU and disk resources.

D.

ApsaraDB for MyBase supports elastic upgrade policies. If the resource utilization of a database exceeds the preset threshold during a business peak, ApsaraDB for MyBase can automatically upgrade database resource specifications to respond to the business peak.

E.

ApsaraDB for MyBase allows you to specify a host when you create an instance.

Question 2

PolarDB for MySQL allows you to deploy a cluster across multiple zones. Compared with single-zone clusters, multi-zone clusters have better disaster recovery capabilities and can withstand data centre-level faults.

Options:

A.

True

B.

False

Question 3

Which of the following statements about Data Transmission Service (DTS) migration scenarios is NOT true?

Options:

A.

DTS can migrate data in a circular way, for example, A > B > C > A.

B.

DTS can migrate data from one source database to one destination database, for example, A > B.

C.

DTS can migrate data from one source database to several destination databases, for example, A > B and A > C.

D.

DTS can migrate data from several source databases to one destination database, for example, A > C and B > C.

Question 4

Which of the following is not a component of the PolarDB-0 architecture in Apsara Stack?

Options:

A.

FC Switch

B.

SAN

C.

Proxy

D.

RDMA

Question 5

Which of the following is NOT supported by schema migration in Advanced Database & Application Migration (ADAM)?

Options:

A.

Re-migrate all schemas

B.

Re-migrate the failed schemas

C.

Migrate the schemas that require a manual revision but have not been revised

D.

Customize schema migration

Question 6

Which of the following are reasonable Data Transmission Service (DTS) use cases? (Number of correct answers: 4)

Options:

A.

Database migration without interrupting services / downtime

B.

Geo-disaster recovery and active geo-redundancy for databases

C.

Synchronizing data to data warehouses in real time to build data warehouses for real-time analytics.

D.

Configuring data audit rules to manage data quality.

E.

Synchronizing information about user accounts and permissions.

F.

Change tracking and data distribution.

Question 7

Which of the following deployment architectures are supported by Alibaba Cloud ApsaraDB for MongoDB? (Number of correct answers: 3)

Options:

A.

Standalone instance

B.

Primary/secondary instance that consists of two nodes

C.

Replica set instance that consists of three nodes

D.

Sharded cluster instance

E.

Replica set instance that consists of six nodes

Question 8

You have a client that wants to move from another cloud provider's database service to RDS. Which of these is the best way to move their database to Alibaba Cloud?

Options:

A.

Use DTS (Data Transmission Service)

B.

Make a full physical backup of their database and copy it into OSS

C.

This type of migration isn't possible

D.

Migrate the entire VM hosting the database

Question 9

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?

Options:

A.

PolarDB MySQL

B.

PolarDB PosgreSQL

C.

PolarDB Oracle

D.

PolarDB Box

Question 10

Which of the following features is NOT supported by Data Transmission Service (DTS)?

Options:

A.

Data migration

B.

Data synchronization

C.

Data backup

D.

Change tracking

Question 11

Which of the following computing capabilities are supported by AnalyticDB? (Number of correct answers: 4)

Options:

A.

Complex extract, transform, load (ETL)

B.

Interactive analysis

C.

Simple point query

D.

Real-time update

E.

Machine Learning

Question 12

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

Options:

A.

Logical backup

B.

Physical backup

C.

Snapshot backup

D.

Full backup

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Total 80 questions
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