ALIBABA CLOUD ACA-CLOUD1 EXAM SIMULATOR & ACA-CLOUD1 SAMPLE QUESTIONS PDF

Alibaba Cloud ACA-Cloud1 Exam Simulator & ACA-Cloud1 Sample Questions Pdf

Alibaba Cloud ACA-Cloud1 Exam Simulator & ACA-Cloud1 Sample Questions Pdf

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Tags: ACA-Cloud1 Exam Simulator, ACA-Cloud1 Sample Questions Pdf, Exam Dumps ACA-Cloud1 Demo, ACA-Cloud1 Valid Test Prep, ACA-Cloud1 Torrent

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Alibaba Cloud ACA Cloud Computing Associate Sample Questions (Q15-Q20):

NEW QUESTION # 15
A company uses Alibaba Cloud SLB and Auto Scaling at the same time, hoping this combination can help save O&M cost and provide a stable and reliable system.
However, because they do not have relevant experience, the company's engineers listed some precautions based on their understanding, and turned the list to you for advice.
As an expert of Alibaba Cloud, you tell them only________is correct.

  • A. All backend servers under the same SLB instance must be in the same Scaling Group
  • B. All ECS instances under the same SLB instance must be running on the same operating system
  • C. SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
  • D. All backend servers under the same SLB instance must have the same configuration

Answer: C

Explanation:
Explanation
SLB and Auto Scaling are two Alibaba Cloud services that can work together to provide high availability, scalability, and performance for your applications. SLB is a load balancing service that distributes incoming traffic across multiple ECS instances. Auto Scaling is a service that automatically adjusts the number of ECS instances based on your business needs. When you use SLB and Auto Scaling together, you need to follow some best practices and precautions to ensure the optimal performance and reliability of your system. One of the precautions is that SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling1. Health Check is a feature of SLB that monitors the health status of the backend ECS instances.
If an ECS instance becomes unhealthy or fails, SLB automatically stops sending traffic to that instance and redirects the traffic to other healthy instances. This ensures that your application can continue to serve user requests without interruption. Health Check is also essential for Auto Scaling, because Auto Scaling relies on the health status reported by SLB to decide whether to add or remove ECS instances. If an ECS instance is unhealthy, Auto Scaling will automatically replace it with a new one. If the traffic increases and the average health status of the ECS instances decreases, Auto Scaling will automatically add more instances. If the traffic decreases and the average health status of the ECS instances increases, Auto Scaling will automatically remove some instances. Therefore, Health Check is a prerequisite for using SLB and Auto Scaling together. If you disable Health Check, SLB and Auto Scaling will not be able to communicate with each other and coordinate their actions. This may result in performance degradation, service interruption, or resource waste.
The other options are incorrect, because they are not necessary or relevant for using SLB and Auto Scaling together. The backend ECS instances under the same SLB instance can have different operating systems, configurations, and scaling groups, as long as they can provide the same service and respond to the same requests. SLB and Auto Scaling do not impose any restrictions on these aspects of the ECS instances.
References: Associate SLB instances with or disassociate SLB instances from a scaling group


NEW QUESTION # 16
You built an online shop using Alibaba Cloud services (ECS, RDS, ...etc.) and very soon you'll have a campaign that every customer that invites 3 friends will get a 50% off coupon. To avoid HTTP flood attacks and ensure only genuine customers (not bots) joining the event, which security product should you choose?

  • A. Anti-DDoS Basic
  • B. WAF
  • C. Anti-DDoS pro
  • D. Server Guard

Answer: B

Explanation:
After adding your website to the WAF protection list, you can enable HTTP Flood protection and select an appropriate protection mode for the website Reference: https://www.alibabacloud.com/help/doc-detail/43443.htm


NEW QUESTION # 17
RDS provides whitelist access policies. You can set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.

  • A. FALSE
  • B. TRUE

Answer: A

Explanation:
Explanation/Reference: https://apsarastackdocument.oss-cn-hangzhou.aliyuncs.com/01_ApsaraStackEnterprise/V3.5.2- intl-en/Alibaba%20Cloud%20Apsara%20Stack%20Enterprise%201808%20Security%20Whitepaper%20-%
2020180831.pdf


NEW QUESTION # 18
Which of the following is not the database type supported by RDS?

  • A. Postgre SQL
  • B. MySQL
  • C. Oracle database
  • D. SQL Server

Answer: C

Explanation:
Explanation/Reference: https://aws.amazon.com/rds/features/


NEW QUESTION # 19
Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. OSS is superior than self-built storage in all these aspects. Which of the following advantage relates to the high availability of OSS?

  • A. The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti- leech URL, and Master-Sub Account
  • B. Data has to be backed up by customer manually, which is time-consuming and labor-intensive.
  • C. Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
  • D. Availability actually relies on the underlying hardware, which can break down easily. Once the hard disk malfunctions, it can also lead to permanent data loss.

Answer: C


NEW QUESTION # 20
......

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