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ACA-Operator Sample Questions Answers

Questions 4

Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)

Options:

A.

Use Multipart Upload to upload multiple parts of a file in parallel to speed up the upload process

B.

Multipart Upload is usually used when the size of the file to be uploaded is large

C.

If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again

D.

After an upload is interrupted, the portions of the file which have successfully uploaded prior to the interruption will be saved in the OSS bucket

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Questions 5

Which database utility is suitable for managing databases in a centralized manner?

Options:

A.

DMS

B.

DBS

C.

DTS

D.

DAS

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Questions 6

A company is developing a music application based on OSS and ECS, their users can download mp3 files after signing up for the application. Recently, the public network traffic to the OSS has doubled but the increase of registered users is less than 10%. After in-depth analysis, system operators find that many download requests are requested from the external search engine. In this case, which of the following measures is thought to be able to address this issue?

Options:

A.

Migrate music files from the OSS to the data disks for ECS instances

B.

Change the website access mode to HTTPS

C.

Enable “Hotlink protection” of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data

D.

Use SLB for extra protection

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Questions 7

Which of the following methods can NOT be used for operating Alibaba Cloud

Elastic Compute Service (ECS) instances?

Options:

A.

CLI

B.

SDK

C.

Console

D.

CloudFormation

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Questions 8

Which of the following web applications are suitable for deployment on Simple Application Server (SAS), as compared with ECS? (Number of correct answers: 3)

Options:

A.

Quickly build a personal blog website

B.

Quickly build a small e-commerce website

C.

Quickly build serverless site using Function Compute

D.

Set up a NoSQL database service

E.

Quickly build a personal, learning, or test environment

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Questions 9

Which command is used to get the Docker daemon information?

Options:

A.

docker info

B.

docker version

C.

docker pull

D.

docker image

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Questions 10

When using Alibaba Cloud CDN, a visitor's request will first be routed to a CDN edge node, and in the event of a cache miss at this edge node, the node will fetch data from the origin site (back-to-source request). Even with this redirection, it is possible for the origin site to see the visitor's real IP address. Which of the following statements about obtaining the visitor's real IP address are correct? (Number of correct answers: 2)

A visitor's real IP address can only be obtained by modifying the site or web application.

B. visitor's real IP address is stored in the "X-Forwarded-For" HTTP header. It can be directly obtained via Apache or NGINX logs.

C. In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.

D. You can activate the "record visitor's real IP" function in the Alibaba Cloud CDN console, then you can directly view visitor's IP addresses from the Alibaba Cloud CDN access logs.

Options:

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Questions 11

Which of these services can be used to monitor Alibaba Cloud resources and send alerts? (Number of correct answers: 3)

Options:

A.

CloudMonitor

B.

ActionTrail

C.

Cloud Config

D.

Object Storage Service (OSS)

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Questions 12

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

Options:

A.

Function Compute

B.

Serverless Workflow

C.

Elastic Compute Service (ECS)

D.

Batch Compute

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Questions 13

You are responsible for the system operations of a product and have implemented the cloud infrastructure in the Alibaba Cloud platform. When

business loads increase, _______ automatically adds ECS instances to

ensure sufficient computing capabilities. When business loads decrease, the

same service automatically removes ECS instances to save costs. Which

service are you using?

Options:

A.

Server Load Balancer (SLB)

B.

Auto Scaling

C.

Resource Orchestration Service (ROS)

D.

Resource Access Management (RAM)

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Questions 14

Which command should you run to create the resources described in the Terraform scripts?

Options:

A.

terraform init

B.

terraform plan

C.

terraform destroy

D.

terraform apply

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Questions 15

Which of the following options correctly describes CloudMonitor Custom Monitoring and Custom Events? (Number of correct answers: 2)

Options:

A.

Custom Events is used for collection of continuous event type data, queries, and alarms

B.

Custom Events is for periodic and continuous collection of time series monitoring data, queries, and alarms

C.

Custom Monitoring is used for periodic and continuous collection of time series monitoring data, queries, and alarms

D.

Custom Monitoring is used for collection of non-continuous event data, such as information about ECS instance restarts

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Questions 16

In order to deal with sudden spikes in traffic, Company A uses Alibaba Cloud

Auto Scaling to set up an alarm trigger task (growing the Scaling Group when

the average memory utilization on ECS instances exceeds 80%). During the

test, it was found that the alarm task was not executed successfully. Which of

these could be possible causes? (Number of correct answers: 3)

Options:

A.

The ECS instances in the Scaling Group have not yet installed the CloudMonitor monitoring agent

B.

Before triggering the alarm task, the number of instances in the group has reached the maximum number of instances allowed (MaxSize)

C.

The instance types chosen in the Scaling Configuration are out-of-stock in the Alibaba Cloud Region where the Scaling Group is located

D.

The number of instances in the current group exceeds the “expected number of instances” for the Scaling Group

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Questions 17

A developer has written a web application using a microservice architecture,

in such an architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chain

consist of?

Options:

A.

3

B.

4

C.

5

D.

6

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Questions 18

Cloud Config tracks configuration changes of your resources and evaluates configuration compliance.

Options:

A.

True

B.

False

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Exam Code: ACA-Operator
Exam Name: ACA System Operator Certification
Last Update: Oct 1, 2024
Questions: 62
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