ACA System Operator Certification ACA-Operator Free Dumps

dumps2021-10-12T03:24:13+08:00

ACA System Operator Certification ACA-Operator exam is hot among those Alibaba Cloud candidates. We provide the latest Alibaba Cloud ACA-Operator exam dumps questions, which can help you test all the related outline. Free Alibaba Cloud ACA-Operator exam dumps are available below.

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

True

False

2. Which database utility is suitable for database migration?

DMS

DBS

DTS

DAS

3. 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)

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

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

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

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

4. Which of these is NOT a function of CloudMonitor?

Set alarm rules for any of CloudMonitor’s metrics

Set the alarm rule effective period (the time during which the alarm may trigger)

Set notification methods for different alarms

Automatically take remedial action when an alarm triggers

5. CORRECT TEXT

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.

6. 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?

Server Load Balancer (SLB)

Auto Scaling

Resource Orchestration Service (ROS)

Resource Access Management (RAM)

7. Which of the following methods can NOT be used for operating Alibaba Cloud Elastic Compute Service (ECS) instances?

CLI

SDK

Console

CloudFormation

8. Which Alibaba Cloud service is used to manage cloud computing resources including the deployment?

Operation Orchestration Service (OOS)

Maintenance Orchestration Service (MOS)

Resource Orchestration Service (ROS)

Resource Access Management (RAM)

9. Which of the following is NOT required for SMC (Server Migration Center) to migrate a server to Alibaba Cloud?

Import the migration source information to the SMC console

From the SMC console, configure the type of disk image to be generated during the migration

The SMC client transfers the source data to an intermediate ECS instance

The SMC backend service generates a target Alibaba Cloud image based on the migration source

10. Which of the following engines is NOT supported by PolarDB?

Oracle

MongoDB

MySQLo

PostgreSQL

11. 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)

Event Notifications can cross regions.

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

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.

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

12. Alibaba Cloud Log Service allows you to store and search logs from a variety of sources, but has no built-in visualization capabilities.

True

False

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

True

False

14. 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?

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

Change the website access mode to HTTPS

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

Use SLB for extra protection

15. If you have a Node.js based application and you plan to migrate it to Alibaba Cloud Function Compute, which of the following steps is unnecessary?

Manually install the Node.js in the Function Compute console

Create a single web application and upload the corresponding code package via the Function Compute console (or fcli)

Configure program startup commands and access ports in the Function Compute console

Start and verify the application in the Function Compute console

16. A developer is making the ModifyDBInstanceSpec API call to change the specifications of an RDS instance, but the operation fails.

Why could this be? (Number of correct answers: 3)

The instance is in the "running" state

No instance type (specification) was included in the request parameters

The instance has a backup task being executed

The targeted RDS instance is a disaster recovery instance

17. Serverless Workflow allow you to orchestrate distributed tasks in sequence, branch, and parallel modes, and ensure that tasks are reliably coordinated according to your workflow logic.

Which of the following service integration modes is not supported by Serverless Workflow?

Request response mode

Synchronization mode

Asynchronous mode

Waiting for callback mode

18. In Alibaba Cloud, a developer finds that the ECS instance he created does not have public IP assigned. The API method used was “Create Instance”.

Which of the following is the most likely reason?

The developer did not call Allocate PublicIp Adress (an additional API call), which is needed to assign a public IP

The Create Security Group API call was not made

The Create Disk API call was not made

The ECS was not restarted after being created

19. Which command is used to get the Docker daemon information?

docker info

docker version

docker pull

docker image

20. 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)

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

Applies indices to fields to contain many records.

A table should not contaiiAiore than 6 indexed fields.

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

Adhere to the rightmost prefix principle when using composite indexes

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21. Which of the following steps is NOT mandatory when creating an API through Alibaba Cloud API Gateway?

Define basic API information

Attach a domain name

Define API Request parameters

Define the API backend service

22. Which of the following statements about ECS Snapshot is NOT correct?

You can manually create snapshots

You can create automatic snapshots

You can roll back a disk by using a snapshot

You can create an ECS instance from a snapshot

23. 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?

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

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

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

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

24. Which Alibaba Cloud service is an automated operations and maintenance (O&M) service to execute O&M tasks?

Operation Orchestration Service (OOS)

Maintenance Orchestration Service (MOS)

Resource Orchestration Service (ROS)

Resource Access Management (RAM)

ACA System Operator Certification ACA-Operator Free Dumps

ACA System Operator Certification ACA-Operator Free Dumps

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