Question 1

Which of the following are relational databases? (Number of correct answers: 5)

AOracle

BMySQL

CPostgreSQL

DMongoDB

EMariaDB

FRedis

GTSDB

HHBase

ISQL Server

Answer : A, B, C, E, I

Question 2

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

AStandalone instance

BPrimary/secondary instance that consists of two nodes

CReplica set instance that consists of three nodes

DSharded cluster instance

EReplica set instance that consists of six nodes

Answer : A, C, D

Question 3

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)

AJSON

BArray

CString

DCube

ERange

FJSONB

GGIS

Answer : A, B, C

Question 4

Which of the following architectures are supported by ApsaraDB for Redis Enhanced Edition (Tair)? (Number of correct answers: 3)

AMaster-replica architecture in which standard master-replica instances are deployed

BRead/write splitting architecture in which standard master-replica instances are deployed

CCluster master-replica instances

DSingle-node architecture

Answer : A, B, C

Question 5

Which of the following statements is NOT correct about PolarDB?

AApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines

BEach ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)

CApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency

DAn ApsaraDB for PolarDB cluster can also be scaled out to a maximum of 16 nodes, and provide up to 6 times of performance improvement traditional MySQL clusters at a 30% to 50% cost reduction

EApsaraDB for PolarDB is designed to handle large amounts of sequential queries

Answer : E

PolarDB is 6 times faster than standard MySQL database in handling large amounts of concurrent queries.

https://www.alibabacloud.com/product/polardb

Free ACA Database Exam Questions for Alibaba ACA Database Exam as PDF & Practice Test Software

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