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ACA-Database Sample Questions Answers

Questions 4

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

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Questions 5

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

Options:

A.

DMS

B.

Data Works

C.

MaxCompute

D.

QuickBl

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Questions 6

Which of the following types of data that is stored in PostgreSQL databases can support the one-to-many data model? (Number of correct answers: 3)

Options:

A.

JSON

B.

Array

C.

String

D.

Cube

E.

Range

F.

JSONB

G.

GIS

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Questions 7

Alibaba Cloud DTS (Data Transmission Service) supports both full database migration and incremental synchronization.

Options:

A.

True

B.

False

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Questions 8

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

Options:

A.

Extended data structure modules

B.

Multithreading

C.

Global Replica

D.

Data flashback

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Questions 9

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?

Options:

A.

40%

B.

50%

C.

60%

D.

70%

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Questions 10

How can ApsaraDB for MyBase solve problems in database security and performance interferences in the multi-tenant scenario?

Options:

A.

ApsaraDB for MyBase supports resource over commitment.

B.

Instances can be migrated. You can manually migrate instances to idle hosts.

C.

Isolated hosts are used. A host runs only your instances and does not run instances of other users.

D.

ApsaraDB for MyBase allows you to distribute different types of instances at a time.

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Questions 11

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

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Questions 12

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

answer: 3)

Options:

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

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Questions 13

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.

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Questions 14

What is the maximum storage size that PolarDB currently provides?

Options:

A.

1TB

B.

10TB

C.

50TB

D.

100TB

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Questions 15

Alibaba Cloud DTS (Data Transmission Service) is a file migration tool.

Options:

A.

True

B.

False

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Questions 16

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

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Questions 17

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

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Questions 18

Which of the following are the benefits of database views? (Number of correct answers: 3)

Options:

A.

Simplicity for queries

B.

Simplicity in structure: presents the database as a set of virtual tables specific to particular users or groups of users

C.

Easier for data visualization

D.

Stabilization of information: presents a consistent, unchanged image of the database structure

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Questions 19

Which database utility is used for data migration and synchronization?

Options:

A.

DMS

B.

DBS

C.

DTS

D.

DAS

E.

ADAM

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Questions 20

When a backup file of core sensitive data is downloaded, business systems must be protected against data breaches. Which of the following capabilities must be enabled to ensure data security?

Options:

A.

Virtual private cloud (VPC)

B.

Secure Sockets Layer (SSL) encryption

C.

Transparent Data Encryption (TDE)

D.

SOL audit

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Questions 21

Which of the following tasks cannot be completed by using Advanced Database & Application Migration (ADAM)?

Options:

A.

De-Oracle workload evaluation

B.

Data structure conversion

C.

Data migration

D.

Performance monitoring

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Questions 22

Which of the following statements about Alibaba Cloud ApsaraDB for MongoDB is true?

Options:

A.

It takes a longer time to perform operations and maintenance (O&M) on ApsaraDB for MongoDB instances than on self-installed and self-managed MongoDB.

B.

DataWorks is not supported for MongoDB data processing.

C.

Alibaba Cloud and MongoDB have a strategic partnership, so Alibaba Cloud Is able to provide the latest MongoDB features in our ApsaraDB for MongoDB product, in all our global regions.

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Questions 23

Your client is having trouble connecting DTS to their source database in their local datacenter, why might this be?

Options:

A.

Their database isn't on Alibaba Cloud already so it cannot be accessed by DTS

B.

Their database is not accessible from the Internet, so DTS cannot access it

C.

Their database must not include the special DTS compatibility mode

D.

Their database is an inverted column store, which is not supported

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Questions 24

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

Options:

A.

pg_dump

B.

pg_restore

C.

pg_upgrade D.DTS

D.

pg_basebackup

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Exam Code: ACA-Database
Exam Name: ACA Database Certification
Last Update: Oct 10, 2024
Questions: 80
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