Alibaba ACA-Operator Exam Practice Test Instant Access

Question 1

When you use SQL statements to access tables in a database without an index configured, a full table scan will be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data and consume a lot of the database's resources. Which of the following options are best practices when creating database indexes? (Number of correct answers: 3)

AAdd an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.

BApplies indices to fields to contain many records.

CA table should not contaiiAiore than 6 indexed fields.

DApply indexing to fields of fixed length (preferably not long fields).

EAdhere to the rightmost prefix principle when using composite indexes

Answer : A, C, D

Question 2

________________ is a fully-managed event-driven computing service that allows you to run code in an elastic and reliable way?

AFunction Compute

BServerless Workflow

CElastic Compute Service (ECS)

DBatch Compute

Answer : A

https://www.alibabacloud.com/help/doc-detail/52895.htm

Question 3

Your company decided to replicate the whole cloud environment in another

region and use it as a cross-region failover in disaster recovery scenarios.

Your current environment includes Elastic Compute Service (ECS) instances,

Server Load Balancer (SLB) instances and Relational Database Service

(RDS) instances. Which of the following statements is correct?

AYou can provision multiple ECS instances in multiple regions, thereby leveraging automatic high availability across regions

BYou can provision multiple SLB instances in multiple regions, thereby leveraging automatic high availability across regions

CYou can use DNS to resolve domain names to the IP addresses of multiple ECS instances running in different regions

DYou can use DNS to resolve domain names to the IP addresses of multiple SLB instances running in different regions

Answer : D

https://cloudacademy.com/course/alibaba-server-load-balancer- 1066/alibabas-high-availability/

Question 4

Which of the following Alibaba Cloud services offers a software-defined wide area network (SD-WAN) solution based on cloud-native technologies?

ANAT Gateway

BSmart Access Gateway (SAG)

CVPN Gateway

DContent Delivery Network (CDN)

Answer : B

https://www.alibabacloud.com/help/doc-detail/69227.htm

Question 5

Which of the following services is used to establish private network connections between virtual private clouds (VPCs) in different regions, or between VPCs and data centers?

ACEN (Cloud Enterprise Network)

BExpress Connect

CVPN Gateway

DNAT Gateway

Answer : A

https://www.alibabacloud.com/help/doc-detail/59870.htm

Question 6

Which database utility is suitable for database migration?

ADMS

BDBS

CDTS

DDAS

Answer : C

https://www.alibabacloud.com/help/doc-detail/176063.htm

Question 7

Which configuration language does Terraform support?

APython

BXML

CHCL

DYAML

Answer : C

https://www.terraform.io/docs/language/syntax/configuration.html

Alibaba ACA-Operator ACA System Operator Certification Exam Practice Test