ACA System Operator Certification (ACA-Operator) Free Practice Test

Question 1

Which of these metrics are collected by CloudMonitor's Host Monitoring function? (Number of correct answers: 3)

A. ECS network I/O

B. Storage space used by OSS buckets

C. Running processes on the ECS instance

D. CPU status of the ECS instance

Correct Answer: A,C,D

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Question 2

Tracing Analysis is used to analyze and diagnose performance bottlenecks in a distributed application architecture and make microservice development and diagnostics more efficient.

A. False

B. True

Correct Answer: B

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Question 3

PolarDB supports three engines: MySQL, PostgreSQL and Oracle.

A. False

B. True

Correct Answer: A

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Question 4

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

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

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

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

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

Correct Answer: A,D

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Question 5

Which of the following features are unique to Alibaba Cloud Container Registry, as compared with Docker Hub? (Number of correct answers: 2)

A. You can set your image repository access to public or private.

B. Container Registry can automatically build new Docker images when source code changes.

C. For source code hosted on websites outside China, Container Registry can use servers outside China to build Docker images, even when you are using a Container Registry instance in Mainland China.

D. You can create and delete image repositories in different regions based on your needs.

Correct Answer: C,D

Question 6

Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)

A. When calling the STS API, in order to ensure the safe calling of the API, Alibaba Cloud will authenticate each API request through a signature when each API call is made

B. The STS service supports the use of both HTTP and HTTPS protocols

C. Through the STS service, RAM users or RAM roles can obtain a temporary token that allows them to call the Alibaba Cloud API or use the web console

D. A STS request consists of an access address, communication protocol, request method, request parameters and character encoding

Correct Answer: A,C,D

Question 7

You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)

A. Message Service provides synchronous notification to ensure the consistency between the message acknowledgment and event processing.

B. The consumer type of the event notification message can be HTTP Server, Queue, or Topic.

C. Event Notifications can cross regions.

D. The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retained based on the specified retry policy.

Correct Answer: B,D

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Alibaba Cloud ACA System Operator Certification (ACA-Operator) Free Practice Test