ACA-Cloud1更新された試験問題集で[2025年最新] 練習有効な試験問題集
ACA-Cloud1サンプルには正確で更新された問題
ACA-Cloud1試験は、クラウドアーキテクチャ、クラウドサービス、クラウドセキュリティなどのクラウドコンピューティングの基本的な概念をカバーしています。また、Elastic Compute Service（ECS）、Object Storage Service（OSS）、Relational Database Service（RDS）などのAlibaba Cloudの特定のサービスとソリューションにも対応しています。この試験はオンラインで行われ、90分以内に50問の多肢選択問題に回答する必要があります。
Alibaba Cloud ACA-Cloud1（ACA Cloud Computing Associate）は、クラウドコンピューティングにおける基礎的な知識とスキルを評価するエントリーレベルの認定試験です。この試験は、クラウドコンピューティングに関する概念、用語、およびクラウドコンピューティング技術の利点と欠点を含むクラウドコンピューティングの基礎的な理解を提供します。ACA-Cloud1試験は、クラウドコンピューティングにおける知識とスキルを検証するための導入的なステップとなります。
質問 # 34
Alibaba Cloud relational database service (RDS) is a stable, reliable and elastic online database service. RDS supports below database types? (Choose three.)
- A. Oracle database
- B. PostgreSQL
- C. SQL Server
- D. MySQL
正解：B、C、D
質問 # 35
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. Which of the following application scenarios are suitable for Auto Scaling?
(Choose three.)
- A. When an ECS instance reacts abnormally in a scaling group, Auto Scaling will create a new ECS instance to take over the computing tasks conducted by the faulty instance.
- B. You need to flexibly adjust elastic computing resources based on your business needs, and ECS instances will be added seamlessly to address traffic peaks and surges.
- C. You want to flexibly adjust elastic computing resources based on your business needs, and ECS instances will be automatically upgraded (with more Memory, more powerful CPU) when needed.
- D. You need to flexibly adjust elastic computing resources based on your business needs, and ECS instances will be reduced automatically to save costs when business needs drop.
正解：A、B、D
解説：
Explanation
Alibaba Cloud Server Load Balancer (SLB) is a service that distributes network traffic across multiple ECS instances to improve the service capabilities of applications. SLB supports the following protocols for the listener configuration:
HTTP: Hypertext Transfer Protocol, a stateless application-layer protocol that is used to transfer web pages and other resources over the internet.
HTTPS: Hypertext Transfer Protocol Secure, an extension of HTTP that uses SSL/TLS encryption to provide secure communication between the client and the server.
TCP: Transmission Control Protocol, a reliable, connection-oriented transport-layer protocol that provides reliable data delivery and error recovery.
UDP: User Datagram Protocol, a connectionless transport-layer protocol that provides fast and efficient data transmission without guaranteeing reliability or order.
SLB does not support the following protocols:
MPLS: Multiprotocol Label Switching, a data-carrying technique that uses labels to forward packets across a network.
MQTT: Message Queuing Telemetry Transport, a lightweight publish/subscribe messaging protocol that is designed for constrained devices and low-bandwidth networks.
References:
Alibaba Cloud Server Load Balancer
ACA Cloud Computing Certification Exam Preparation Course
Alibaba Cloud Computing Exam Question 2022
質問 # 36
Server Load Balancer can help protect from ___________________ attack.
- A. SQL injection
- B. DDoS
- C. Ransomware
- D. Virus
正解：B
解説：
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/27539.htm
質問 # 37
You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)
- A. OSS
- B. ECS
- C. SLB
- D. MaxCompute
- E. RDS
正解：A、B、E
質問 # 38
Server Load Balancer supports health checks for ECS instances and allows user to specify the frequency. If an ECS instance does not qualify the health check, traffic will not be forwarded to that instance, thereby ensuring application availability.
- A. TRUE
- B. FALSE
正解：B
質問 # 39
You can __________________ an ECS instance's configuration. (Choose two.)
- A. upgraded
- B. downgraded
- C. downloaded
- D. uploaded
正解：A、B
解説：
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/25437.htm
質問 # 40
Cloud disks are reliable because they use_________to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
- A. a distributed file management system with 3 redundant copies
- B. a Linux file system
- C. a double copy distributed system
- D. a file system
正解：A
解説：
Explanation
An ECS disk can be used jointly or separately to meet the requirements of different application scenarios. ECS disks are categorized into ephemeral SSD disks and cloud disks. Compared with ephemeral SSD disks, cloud disks are more reliable as they use a triplicate distributed system to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
質問 # 41
Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean ?
- A. Server Load Balancer can be deployed for ECS instances in various regions.
- B. Server Load Balancer cannot be deployed for ECS instances in various regions.
- C. ECS instances in different regions cannot communicate with each other on the intranet.
- D. ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
正解：D
解説：
Reference:
https://www.alibabacloud.com/help/doc-detail/40654.htm
質問 # 42
If you are running an online ticket booking service with relatively fixed traffic, then which kind of charging mode is more suitable for you?
- A. Prepaid
- B. Paypal-pay
- C. bitcoin-pay
- D. Pay-As-You-Go
正解：A
解説：
Explanation
Prepaid is a charging mode that allows you to pay in advance for a certain amount of resources for a specified period of time. It is also known as subscription or reserved instance. Prepaid is more suitable for scenarios with relatively fixed traffic, such as an online ticket booking service, because it offers lower prices and more stable performance than pay-as-you-go. Pay-as-you-go is a charging mode that allows you to pay only for the resources you actually use on an hourly basis. It is more suitable for scenarios with unpredictable or fluctuating traffic, such as a news website or a social media platform. Paypal-pay and bitcoin-pay are not valid charging modes for Alibaba Cloud Computing products.
References: 1: Alibaba Cloud Academy, "Charging Modes",
https://edu.alibabacloud.com/elearning/lesson/ACA-Cloud-Computing-Certification/lesson-1-charging-modes
質問 # 43
Server Load Balancer can help protect fromattack.
- A. SQL injection
- B. DDoS
- C. Ransomware
- D. Virus
正解：B
質問 # 44
A video streaming company uses SLB to distribute user requests to 30 ECS instances (the 30 ECS instances have the same configuration). Yet, the company finds that the service traffic soars dramatically every night from 20:00 to 02:00. According to their calculation, the evening traffic is 100% higher than the traffic in other periods of time. To properly respond to user requests, which of the following methods is most preferred from the perspective of cost and implementation simplicity?
- A. Configure Auto Scaling appropriately to automatically upgrade/downgrade the ECS instances.
- B. Create 30 ECS instances based on the custom image and add them to SLB. Then, configure weights for these ECS instances to respond to user requests every night from 20:00 to 02:00, and reset those weights to zero for other periods of time.
- C. Configure Auto Scaling appropriately to automatically add or reduce ECS instances.
- D. Manually create 30 ECS instances using the custom image, and then add them to SLB every night before 20:00 and remove them after 02:00.
正解：C
解説：
Reference:
https://www.alibabacloud.com/product/auto-scaling
質問 # 45
Which of the following statements is wrong when comparing RDS with self-built database?
- A. Self-built database supports quick deployment and elastic scaling.
- B. RDS features a high availability of 99.95% while self-built database requires you to implement data protection, primary-standby replication, and RAID all by yourself.
- C. RDS requires no O&M while self-built database requires a dedicated DBA for maintenance, which results in high HR cost.
- D. RDS provides automatic backup while self-built database requires you to prepare storage space for backup copies and regularly verify that these copies can be restored.
正解：A
質問 # 46
What is the full name of ECS?
- A. Elastic Compute Service
- B. Elastic Computing Server
- C. Elastic Communication Server
- D. Elastic Cost Server
正解：A
解説：
Explanation
Elastic Compute Service (ECS) is an IaaS offering on Alibaba Cloud that provides high-performance, stable, reliable, and scalable compute capacity in the cloud. ECS eliminates your need to invest in hardware up front.
You can create as many or as few instances as you need in response to changes in requirements or popularity of your workloads. With an ever-growing selection of instance types, ECS provides broader and deeper choices to match a wide spectrum of computing needs. References: What is ECS? - Alibaba Cloud
質問 # 47
Alibaba Cloud's object storage (Object Storage Service, OSS for short) can be used to store massive amount of files, but there is still a maximum number of files in a single bucket.
- A. TRUE
- B. FALSE
正解：A
質問 # 48
Anti-DDoS is one of the major features in Alibaba Cloud Security Service. Many websites have experienced different types of DDoS attacks, an accurate understanding of DDoS is crucial to protecting websites. Which of the following descriptions about DDoS attack is the most accurate one?
- A. DDoS attack will try to crack the password through a large number of attempts.
- B. The main purpose of DDoS attack is to make the target server unable to provide service normally, which is one of the network attacks that are most difficult to defend.
- C. The purpose of DDoS attack is to steal confidential information.
- D. The main target for DDoS attack is the database.
正解：B
解説：
Explanation
The main purpose of DDoS attack is to make the target server unable to provide service normally, which is one of the network attacks that are most difficult to defend. Comprehensive and Detailed Explanation: A Distributed Denial-of-Service (DDoS) attack is a malicious attempt to disrupt the normal operation of a target server, service, or network by overwhelming it with a flood of internet traffic from multiple sources1. The main purpose of a DDoS attack is to make the target server unable to provide service normally, which is one of the network attacks that are most difficult to defend. A DDoS attack can cause serious damage to the availability, performance, and reputation of the target server, service, or network, and result in significant financial losses and customer dissatisfaction2.
The other options are not accurate descriptions of a DDoS attack. The main target for a DDoS attack is not the database, but the server, service, or network that hosts the database or other applications. A DDoS attack will not try to crack the password through a large number of attempts, but rather try to exhaust the resources of the target server, service, or network. The purpose of a DDoS attack is not to steal confidential information, but rather to disrupt the normal operation of the target server, service, or network. References: 1: What is a DDoS Attack?1 2: Anti-DDoS: Intelligent DDoS Protection Service - Alibaba Cloud2
質問 # 49
An enterprise hosts their servers (include both Linux and Windows servers) in a traditional IDC. Every night hackers with IP addresses from many countries try to crack the password of their servers, making the administrator terribly worried about this. However, because of work requirements, the remote management port of these servers must be opened to public network.
The administrator heard that Alibaba Cloud has solutions that can help customers improve the security of their systems. Therefore, he/she wants to migrate the system to Alibaba Cloud. Which of the following functions should the administrator activate in Alibaba Cloud to reduce the possibility of brute force password cracking?
- A. Server Guard
- B. CloudMonitor
- C. Anti-DDoS Basic Service
- D. Situation Awareness
正解：A
解説：
Reference:
https://www.alibabacloud.com/blog/blogblogalibaba-cloud-server-guard-a-comprehensive- assessment_284390
質問 # 50
A company wants to use Alibaba Cloud service to replace their self-built database, which of the following services should it choose?
- A. Deploy more ECS instances
- B. Alibaba Cloud CDN (Content Delivery Network)
- C. Server Load Balancer (SLB)
- D. AsparaDB for RDS
正解：A
質問 # 51
You canan ECS instance's configuration. (Choose two.)
- A. upgraded
- B. downgraded
- C. downloaded
- D. uploaded
正解：A、B
質問 # 52
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. Which of the following is not the feature supported by Alibaba Cloud Auto Scaling?
- A. Elastic Scale-In
- B. Elastic Self-Diagnostic
- C. Elastic Scale-Out
- D. Elastic Self-Health
正解：B
解説：
Explanation
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. Auto Scaling supports the following features12:
Elastic Scale-Out: Automatically adds ECS instances to handle increased workloads.
Elastic Scale-In: Automatically removes ECS instances to reduce costs when workloads decrease.
Elastic Self-Health: Automatically replaces unhealthy ECS instances to ensure high availability and reliability.
Scheduled Scaling: Automatically adds or removes ECS instances based on predefined schedules.
Predictive Scaling: Automatically predicts future workloads and adjusts ECS instances accordingly.
Elastic Self-Diagnostic is not a feature supported by Alibaba Cloud Auto Scaling. It is a fictitious term that does not exist in the Alibaba Cloud documentation or course materials. References: 1: Auto Scaling:
Automatically Adjusts Computing Resources - Alibaba Cloud 2: Auto Scaling:What is Auto Scaling? - Alibaba Cloud
質問 # 53
When we talk about the 'Elastic' feature for ECS product, we are not talking about.
- A. Elastic Storage
- B. Elastic Computing
- C. Elastic Network
- D. Elastic Administration
正解：D
解説：
Explanation
Elastic Computing Service (ECS) is a cloud computing service that provides scalable, on-demand computing resources for cloud applications. ECS offers elastic computing, elastic storage, and elastic network features to meet different business needs. However, ECS does not provide elastic administration, which means that the management and configuration of ECS resources are not automatically adjusted according to the workload or demand. Users need to manually create, modify, or delete ECS instances, disks, snapshots, security groups, and other resources. Users can also use other Alibaba Cloud services, such as Auto Scaling, Server Load Balancer, and Cloud Monitor, to enhance the elasticity and availability of ECS.
References:
[Alibaba Cloud Elastic Compute Service]
ACA Cloud Computing Certification Exam Preparation Course
Alibaba Cloud ACA-Cloud1 ACA Cloud Computing Certification Exam
質問 # 54
Alibaba Cloud Monitor service stems from years of experience of server monitoring technology in Alibaba group, leveraging the powerful data analysis capability of Alibaba cloud computing platform to provide monitoring service for various clients' applications and servers. A user receives an alert saying that the IOPS utilization rate for an ECS instance exceeds 80%. Yet, he/she is not sure how to handle the situation, the user may obtain help from Alibaba Cloud through the below methods? (Choose three.)
- A. Look for answers in Alibaba Cloud forum.
- B. You cannot obtain any help from Alibaba Cloud.
- C. Check ECS or CloudMonitor product documents.
- D. Open a ticket to Alibaba Cloud help desk.
正解：A、C、D
質問 # 55
An enterprise hosts their servers (include both Linux and Windows servers) in a traditional IDC. Every night hackers with IP addresses from many countries try to crack the password of their servers, making the administrator terribly worried about this. However, because of work requirements, the remote management port of these servers must be opened to public network.
The administrator heard that Alibaba Cloud has solutions that can help customers improve the security of their systems. Therefore, he/she wants to migrate the system to Alibaba Cloud. Which of the following functions should the administrator activate in Alibaba Cloud to reduce the possibility of brute force password cracking?
- A. Server Guard
- B. CloudMonitor
- C. Anti-DDoS Basic Service
- D. Situation Awareness
正解：A
解説：
Explanation
Server Guard is a cloud-based security service that provides real-time protection for servers against intrusion events, such as brute force password cracking. Server Guard consists of a lightweight agent that is installed on the server and a cloud protection center that analyzes and responds to security threats. Server Guard can help the administrator to reduce the possibility of brute force password cracking by providing the following features1:
Password cracking protection: Server Guard can detect and block password cracking attempts on servers, such as SSH brute force attacks on Linux servers and RDP brute force attacks on Windows servers. Server Guard can also alert the administrator of the attack source, time, and frequency, and provide suggestions for password strengthening.
Webshell detection and removal: Server Guard can scan and remove webshells that are maliciously implanted on servers by hackers. Webshells are scripts that allow hackers to remotely execute commands on servers, such as stealing data, uploading files, or launching attacks. Server Guard can identify and delete webshells based on signature matching, behavior analysis, and machine learning.
Anti-virus and anti-ransomware: Server Guard can detect and terminate various types of malware, such as ransomware, mining programs, backdoor programs, worms, and trojans. Server Guard can also prevent the encryption and deletion of files by ransomware, and restore the files to their original state.
Security baseline check: Server Guard can perform security baseline checks on servers to evaluate their security posture and compliance level. Server Guard can check more than 40 security items, such as system configuration, account management, network security, and log audit. Server Guard can also provide security hardening suggestions and one-click fixes for the detected issues.
Security situation awareness: Server Guard can provide a comprehensive and visualized view of the security situation of the servers, such as the number of attacks, the attack sources, the attack types, the attack trends, and the security score. Server Guard can also provide security reports and recommendations for improving the security level of the servers. References: Security Center
質問 # 56
Which of the following statements is wrong when comparing RDS with self-built database?
- A. Self-built database supports quick deployment and elastic scaling.
- B. RDS features a high availability of 99.95% while self-built database requires you to implement data protection, primary-standby replication, and RAID all by yourself.
- C. RDS requires no O&M while self-built database requires a dedicated DBA for maintenance, which results in high HR cost.
- D. RDS provides automatic backup while self-built database requires you to prepare storage space for backup copies and regularly verify that these copies can be restored.
正解：A
解説：
Explanation
ApsaraDB RDS is a cloud-based relational database service that provides secure, cost-effective, and scalable database solutions for various applications. RDS has many advantages over self-built databases, such as high availability, automatic backup, and easy O&M. One of the statements that is wrong when comparing RDS with self-built database is that self-built database supports quick deployment and elastic scaling. This is not true, because self-built database requires users to purchase, install, and configure hardware and software by themselves, which can be time-consuming and complex. Moreover, self-built database cannot easily adjust the computing and storage resources according to the business needs, which can lead to over-provisioning or under-provisioning. RDS, on the other hand, supports quick deployment and elastic scaling, because users can create, modify, or delete RDS instances in minutes through the console or API. Users can also scale up or down the RDS instance specifications, storage capacity, or network bandwidth without affecting the business continuity.
References:
ApsaraDB RDS
ACA Cloud Computing Certification Exam Preparation Course
Which of the following statements is NOT correct, when comparing RDS ...
質問 # 57
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ACA-Cloud1 試験は、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する50の多肢選択問題から構成されています。これには、クラウドコンピューティングの概念、Alibaba Cloud の製品やサービス、クラウドコンピューティングのセキュリティ、クラウドベースのソリューションの展開と管理のベストプラクティスなどが含まれます。
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