2025年最新のの問題Alibaba Cloud ComputingとACA-Cloud1リアル試験問をマスターせよ！
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質問 # 38
A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. He/she sets the "Minimum number of instances" to 6 and "Maximum number of instances" to 8.
After correctly configuring scaling settings, the customer adds a scaling rule "Adjust to 10 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 6 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instances are left in the scaling group when the scheduled task is activated once?
- A. Five
- B. Ten
- C. Six
- D. Eight
正解：A
質問 # 39
When using Alibaba Cloud OSS, you can set access control in 3 different levels, which are (Choose three.)
- A. Bucket level
- B. RAM account level
- C. Directory level
- D. Object level
正解：A、B、D
解説：
Explanation
When using Alibaba Cloud OSS, you can set access control in three different levels, which are bucket level, object level, and RAM account level. Bucket level access control is the highest level of access control, which determines whether a user can access the bucket and its objects. Bucket level access control can be set to public read/write, public read, or private. Object level access control is the second level of access control, which determines whether a user can access a specific object in the bucket. Object level access control can be set to inherit from the bucket, public read/write, public read, or private. RAM account level access control is the lowest level of access control, which determines whether a user can perform certain operations on the bucket or the object. RAM account level access control can be set by using RAM policies, which specify the actions, resources, and conditions for the access. References: Object Storage Service (OSS) - Alibaba Cloud Academy, Access Control - Alibaba Cloud Documentation Center
質問 # 40
Company A builds a sales management platform based on Alibaba Cloud services, using 3 ECS instances. One of the ECS instance has MySQL installed as the database server of the platform, the other two are used as WEB servers. After some time, due to the rapid increase of employees and sales analysis requests, the performance of the platform is challenged in terms of response time. Through CloudMonitor, it is found that the average CPU usage reaches 70% for the two WEB server ECS instances and the database load reaches 75% for the database server ECS instance. In this situation, company A may choose which Alibaba Cloud services to improve the performance . (Choose two.)
- A. Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
- B. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
- C. Import data into OSS to share the storage load of the platform.
- D. Use RDS to replace existing self-built database, in order to obtain better database performance; also creating RDS read-only instances to handle read-only requests, hence reduce the work load on master RDS instance.
正解：B、D
質問 # 41
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. 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.
- D. Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
正解：D
解説：
Reference:
https://www.alibabacloud.com/blog/alibaba-cloud-object-storage-vs--ibm-cloud-and-oracle-cloud- equivalent_293464
質問 # 42
Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. To control the access to the files stored on OSS, OSS provides multiple access permissions for each bucket. These bucket permissions are. (Choose three.)
- A. Public-read
- B. Private
- C. Public-read-write
- D. Private-read
正解：A、B、C
質問 # 43
SQL injection is a common application layer attack, usually through building special input parameters and pass it to web applications to steal or sabotage the application data. Which of the following is the target for SQL injection?
- A. Web application
- B. Database
- C. Pictures on server
- D. Confidential files on the server
正解：B
解説：
Explanation
SQL injection is a common application layer attack that targets the database of a web application. SQL injection exploits a security vulnerability in the application's software, such as incorrect filtering of user input, that allows an attacker to send malicious SQL statements to the database. These statements can then be executed to steal, modify, or delete data, or even execute commands on the server1. SQL injection can also bypass authentication and authorization mechanisms, and sometimes even impersonate or damage the underlying system2. SQL injection is one of the most common and dangerous web attacks, and it can cause serious damage to the confidentiality, integrity, and availability of web applications3. References: 1: SQL Injection - OWASP2: SQL Injection - Web Application Firewall - Alibaba Cloud Documentation Center3: Web Application Firewall:What is WAF? - Alibaba Cloud.
質問 # 44
You can create a custom image for ECS using which of the followings? (Choose two.)
- A. Data disk snapshot
- B. System disk snapshot
- C. CPU snapshot
- D. Memory snapshot
正解：A、B
質問 # 45
Company A builds a sales management platform based on Alibaba Cloud services, using 3 ECS instances. One of the ECS instance has MySQL installed as the database server of the platform, the other two are used as WEB servers. After some time, due to the rapid increase of employees and sales analysis requests, the performance of the platform is challenged in terms of response time. Through CloudMonitor, it is found that the average CPU usage reaches 70% for the two WEB server ECS instances and the database load reaches
75% for the database server ECS instance. In this situation, company A may choose which Alibaba Cloud services to improve the performance. (Choose two.)
- A. Import data into OSS to share the storage load of the platform.
- B. Use RDS to replace existing self-built database, in order to obtain better database performance; also creating RDS read-only instances to handle read-only requests, hence reduce the work load on master RDS instance.
- C. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
- D. Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
正解：B、D
解説：
Explanation
A and C are the correct answers because they can improve the performance of the platform by reducing the load on the ECS instances and the database server.
A is correct because using CDN can accelerate the delivery of static content such as CSS and JavaScript files, which can reduce the bandwidth consumption and latency of the ECS instances. CDN can also cache the content in edge nodes closer to the end users, which can improve the user experience and response time of the platform1 C is correct because using RDS can replace the existing self-built database, which can provide better database performance, reliability, security, and scalability. RDS can also handle the backup, recovery, monitoring, and maintenance of the database, which can reduce the management overhead and cost of the platform. Moreover, creating RDS read-only instances can handle read-only requests, which can reduce the workload on the master RDS instance and improve the database availability and performance23 References: 1: CDN Overview 2: RDS Overview 3: RDS Read-only Instances
質問 # 46
ECS can be used along with_____to store static images, videos, and reducing storage fees.
- A. RDS
- B. Server Load Balancer
- C. OSS
- D. VPC
正解：C
質問 # 47
You can create a custom image for ECS using which of the followings? (Choose two.)
- A. Data disk snapshot
- B. System disk snapshot
- C. CPU snapshot
- D. Memory snapshot
正解：A、B
解説：
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/25460.htm
質問 # 48
In which of the following cases would you need to apply an ICP license? (Choose three.)
- A. Launch your online shop in China
- B. Launch your website in China
- C. Open your office in China
- D. Accelerate your Overseas Website in China
正解：A、B、C
解説：
Explanation/Reference: https://www.alibabacloud.com/icp
質問 # 49
Your website has high volume of traffic and sudden spikes for a very short time. In this scenario, can manage traffic peak efficiently and maintain a consistent user experience.
- A. RDS
- B. Server Load Balancer
- C. Auto Scaling
- D. VPC
正解：C
解説：
Reference:
https://www.alibabacloud.com/blog/designing-a-cloud-based-architecture-for-internet-of-vehicles- iov-series-ii_594263
質問 # 50
A/An is a copy of data on a disk at a certain point in time.
- A. snapshot
- B. template
- C. image
- D. EIP
正解：A
質問 # 51
You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)
- A. RDS
- B. MaxCompute
- C. OSS
- D. SLB
- E. ECS
正解：A、C、E
解説：
Reference:
http://docs-aliyun.cn-hangzhou.oss.aliyun-inc.com/pdf/slb-faq-intl-en-2017-03-29.pdf
質問 # 52
ECS is a highly flexible service. It can be used independently as a simple web server, or used with other Alibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as:. (Choose four.)
- A. Databases
- B. no limited online storage
- C. large-traffic apps
- D. simple web applications
- E. Official corporate websites
正解：A、C、D、E
解説：
Explanation
A, B, C, and D are the correct answers according to the ACA Cloud Computing by Alibaba Cloud Academy Reference Materials and documents. Comprehensive and Detailed Explanation: = A, B, C, and D are the correct answers because ECS is a highly flexible service that can be used independently as a simple web server, or used with other Alibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as:
Official corporate websites: ECS can host official corporate websites that require high performance, stability, reliability, and scalability. ECS can also support various web frameworks and languages, such as PHP, Java, Node.js, Python, and Ruby. ECS can also be integrated with other Alibaba Cloud products, such as SLB, CDN, and WAF, to improve the security, availability, and performance of the websites1 Large-traffic apps: ECS can handle large-traffic apps that require high concurrency, low latency, and high throughput. ECS can also scale up or down based on the real-time traffic demands, and use Auto Scaling to automate the scaling process. ECS can also leverage the Alibaba Cloud network infrastructure, such as VPC, Express Connect, and Global Accelerator, to optimize the network connectivity and performance of the apps2 Databases: ECS can run various database systems, such as MySQL, PostgreSQL, MongoDB, and Redis, to provide data storage and processing capabilities for different applications. ECS can also use cloud disks or local disks as the storage media for the databases, and choose different disk types, such as SSD, ESSD, and Ultra Disk, based on the performance and cost requirements. ECS can also use RDS or PolarDB to replace the self-managed databases, and enjoy the benefits of managed database services, such as backup, recovery, monitoring, and maintenance3 Simple web applications: ECS can run simple web applications that do not require complex architectures or high availability. ECS can provide fast memory and the latest CPUs to power the web applications and achieve faster results with low latency. ECS can also use OSS to store static files, such as images, videos, and documents, and reduce the storage cost and load of the ECS instances.
E is an incorrect answer because ECS is not a storage service that provides unlimited online storage. ECS is a compute service that provides virtual machines with limited storage capacity. ECS can use OSS or NAS to expand the storage capacity, but these are separate storage services that have their own pricing and billing methods.
References: 1: Build a Corporate Website 2: Build a Large-Traffic App 3: Build a Database System : [Build a Simple Web Application] : [ECS Overview]
質問 # 53
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
正解：B
解説：
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
質問 # 54
Your website has high volume of traffic and sudden spikes for a very short time. In this scenario, can manage traffic peak efficiently and maintain a consistent user experience.
- A. RDS
- B. Server Load Balancer
- C. Auto Scaling
- D. VPC
正解：C
解説：
Explanation
Auto Scaling is a service that automatically adjusts computing resources based on your volume of user requests. When the demand for computing resources increases, Auto Scaling automatically adds ECS instances to serve additional user requests, or alternatively removes instances in the case of decreased user requests1. Auto Scaling can help you manage traffic peaks efficiently and maintain a consistent user experience by scaling up or down your ECS instances according to your predefined policies and business needs2. References: 1: Auto Scaling: Automatically Adjusts Computing Resources - Alibaba Cloud2: Overview - Auto Scaling - Alibaba Cloud Documentation Center.
質問 # 55
Your website has high volume of traffic and sudden spikes for a very short time. In this scenario, can manage traffic peak efficiently and maintain a consistent user experience.
- A. RDS
- B. Server Load Balancer
- C. Auto Scaling
- D. VPC
正解：C
質問 # 56
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この試験では、クラウドコンピューティング、クラウドアーキテクチャ、セキュリティとコンプライアンス、ストレージ、ネットワーキング、データベースの概念の基本など、クラウドコンピューティングに関連する幅広いトピックをカバーしています。この試験は、クラウドリソースを管理および維持する個人の能力、およびさまざまなクラウドサービスの展開と管理方法の理解をテストするように設計されています。
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