Alibaba Cloud ACP-Cloud1 Practice Exams
Last updated on Oct 22,2026- Exam Code: ACP-Cloud1
- Exam Name: ACP Cloud Computing Certification
- Certification Provider: Alibaba Cloud
- Latest update: Oct 22,2026
You are designing a solution for a startup company, the proposed solution is like this You suggest they use ECS instances to process requests from mobile App clients, and use SLB to distribute data traffic and ensure the load across each backend ECS instance is balanced.
Moreover to deal with volatile fluctuations in business volume (page views are much higher on the weekends), you also suggest they use Auto Scaling to dynamically increase or reduce computing resources.
The company is satisfied with the solution you proposed. However, they have one concern that when removing an idle instance from the scaling group: if Auto Scaling shuts the instance down directly, the service running on that instance will be abruptly terminated, resulting in poor user experience.
In order to eliminate your customer’s concern, which of the following solutions should you recommend them?
- A . Find the ECS instance that is going to be removed from the backend server pool of the SLB instancer and automatically set the weight of this ECS instance to 0. This instance will not be assigned with new requests, and will be automatically removed from the backend server pool after existing tasks are completed.
- B . First, insert a script into the image for creating the ECS instance Second, make the script run automatically when the operating system in this ECS instances is about to shut down. This script contains the processing logic that can ensure the instance finish all the remaining tasks before
shutting down. - C . Find the ECS instance that is going to be removed from the backend server pool of the SLB instance, and manually remove this instance from the backend server pool Applications running on this ECS instance will normally return results, but this instance will not be assigned with new requests.
- D . Use the Lifecycle Hook function embedded m Auto Scaling Define a suitable timeout and a web hook to do the necessary work before the instance is removed.
D
Explanation:
According to the Alibaba Cloud Auto Scaling documentation1, the Lifecycle Hook feature allows you to perform custom operations on instances that are added to or removed from a scaling group. You can define a lifecycle hook to specify a timeout period and a web hook URL. When an instance is about to be removed, Auto Scaling sends a notification to the web hook URL and waits for a response. During the timeout period, you can perform the necessary operations on the instance, such as gracefully shutting down the service, backing up the data, or sending a custom notification. After the operations are completed, you can send a response to the web hook URL to confirm the removal of the instance. This way, you can ensure that the instance is removed without affecting the user experience or causing data loss. Therefore, option D is the best solution to eliminate the customer’s concern.
Reference: Lifecycle hooks and Alibaba Cloud Auto Scaling.
In some cases, you can purchase Elastic Compute Service (ECS) instances in Pay-As-You-Go mode to meet the demands for requiring additional computing resources in a particular period of time and set an auto-release time to release these Pay-As-You-Go instances later. ___________________ is a correct description of this operation.
- A . You can set the auto-release time only when creating the Elastic Compute Service (ECS) instance
- B . You can set the auto-release time of the ECS instance once
- C . You can set the auto-release time of the ECS instance multiple times
- D . You cannot cancel the set auto-release time of the ECS instance
C
Explanation:
Alibaba Cloud ECS allows users to set an auto-release time for Pay-As-You-Go instances, giving flexibility in handling temporary workloads without manually releasing instances. Notably, the auto-release time can be adjusted multiple times even after the instance has been created, allowing for modifications as business needs change. This feature provides a convenient way to manage costs by automatically releasing instances when they are no longer needed. However, once the auto-release time is set, it must be adjusted or canceled if changes are required.
Reference: Alibaba Cloud ECS Instance Auto-Release
An online education website is built based on ECS, SLB and Auto Scaling, which greatly reduces resource cost, O&M cost and without compromising system stability and user experience.
Now, the website admin wants to keep the user information (such as source IP, accessed URLs, and duration on each page) for analysis to support their upcoming campaign events.
In this case, which of the following statements is NOT correct? (Single answer)
- A . Let each ECS instance in the scaling group keeps the user access information it processes. Thus, the data saved by these ECS instances can be accessed and analyzed at any time, making the solution not only simple, but also efficient, reliable, and cost-effective.
- B . Save user-related access information to ApsaraDB for RDS in real time or quasi real time, which can then be used for performing query and analysis,
- C . Synchronize user-related access information to ApsaraDB for Memcache in real time or quasi real time. Then, access Memcache using an application or make the data in Memcache persistent based on certain rules, and then can use the persistent data for further analysis.
- D . Synchronize user-related access information to OSS in real time or quasi real time for further use.
When using Alibaba Cloud SLB, a user configures the Health Check as follows: response timeout value set to 5 seconds, Health Check interval set to 2 seconds, unhealthy threshold value set to 3, and healthy threshold value set to 3. That is to say, to confirm a backend ECS instance is healthy, three successive normal responses are required.
If the current status of a backend ECS instance is unhealthy, and you finish the repair work immediately, it will take at least _______________ for SLB Health Check to confirm this instance is
healthy again.
- A . 11 seconds
- B . 21 seconds
- C . 5 seconds
- D . 6 seconds
A
Explanation:
To confirm a previously unhealthy instance is now healthy, Alibaba Cloud SLB requires three consecutive successful health checks. With a health check interval of 2 seconds and a response timeout of 5 seconds, each check cycle takes up to 5 seconds. Therefore, three successive health checks would take a minimum of 5×3=155 times 3 = 155×3=15 seconds in total. However, because the health checks are conducted at 2-second intervals, there’s overlap, reducing the actual time to at least 11 seconds for the SLB to mark the instance as healthy.
Reference: Alibaba Cloud SLB Health Check Documentation
Which of the following statements is true for RDS?
- A . Multiple databases can be created for one instance
- B . Databases with the same name are allowed in the same instance
- C . Resources are not shared among the databases in the same instance
- D . None of the above is true
A
Explanation:
In Alibaba Cloud RDS, multiple databases can be created within a single instance, allowing users to manage different databases under one RDS instance efficiently. However, databases within the same instance must have unique names, and resources such as CPU and memory are shared across databases within the same instance, contrary to the options provided in answers B and C.
Reference: Alibaba Cloud RDS Instance Management
A user builds an ECS + SLB + RDS architecture on Alibaba Cloud, with Auto Scaling to dynamically manage ECS instances. For business needs, they use ApsaraDB for Redis as a cache for hot data, requiring ECS instances to be added or removed from the Redis whitelist as they scale. As an Alibaba Cloud architect, which three Auto Scaling and OOS features would you recommend to automate adding and removing instances from the Redis whitelist? (Choose three.)
- A . Auto-Scaling lifecycle hooks
- B . OOS Template
- C . MNS
- D . Instance launch template
A, B, C
Explanation:
Using lifecycle hooks in Auto Scaling allows for custom operations, such as updating the Redis whitelist when instances are added or removed. An OOS (Operation Orchestration Service) template can automate this process, and MNS (Message Notification Service) can trigger events to inform Redis when changes occur.
A popular worldwide forum stores static resources in OSS and accelerates access using CON Users find that the speed of downloading files from the forum has been greatly improved, but uploading files is slow due to the long data transmission distance, resulting in a bad access experience In order to improve the speed of uploading files for users in this forum, so that users in different regions can have a good access experience, we recommend that the forum can________.
- A . Activate the PCDN service
- B . Activate OSS in different regions as file storage, and synchronize data between OSS in different regions through cross-region replication
- C . Enable the transmission acceleration service for O: Enable OSS
- D . Enable OSS static website hosting
C
Explanation:
The transmission acceleration service for OSS is a feature that allows you to access OSS buckets through a global acceleration endpoint, which can improve the upload and download speed of OSS data across regions. The global acceleration endpoint is a domain name that is resolved to the nearest OSS access point based on the network conditions of the client. This way, the data transmission distance is shortened and the network latency is reduced. Therefore, option C is the correct answer.
Reference: Enable transfer acceleration, Map an acceleration endpoint
To connect VPC with your traditional IDC. Alibaba Cloud currently supports the following methods: ________________ (Number of correct answers: 2)
- A . VPN Gateway
- B . HTTP agent
- C . Connection through a stopping stone
- D . Leased line connection
The daily PV volume of a community website is as high as 20 million. The applications of the website are deployed on ECS instances while logs are stored on the data disks of a single ECS instance.
Now, the website wants to extend the log retention period to 24 months and ensure that logs can be quickly downloaded when needed. The current data disks they have can only help retain three months of logs In this case, ________ is the ideal solution for solving the log retention issue.
- A . CDN
- B . Container Service
- C . OSS
- D . ApsaraDB for RDS
C
Explanation:
OSS (Object Storage Service) is a secure, cost-effective, and highly reliable cloud storage service that allows you to store, back up, and archive any amount of data in the cloud 1. OSS is ideal for storing logs, as it provides 99.9999999999% (12 nines) durability and 99.995% availability or service continuity 1. OSS also supports lifecycle management, which allows you to automatically delete or transition objects to lower-cost storage classes based on your predefined rules2. OSS offers four tiers of storage: Standard, Infrequent Access, Archive, and Cold Archive. Each tier is cost-optimized for specific storage patterns 1. The Archive and Cold Archive tiers are suitable for storing infrequently accessed data, such as logs, for a long time. The Archive tier offers data retrieval time within one minute, while the Cold Archive tier offers expedited data retrieval time within an hour 1. Therefore, OSS can help the website extend the log retention period to 24 months and ensure that logs can be quickly downloaded when needed.
CDN (Content Delivery Network) is a distributed network that delivers content to users based on their geographic locations, the origin sites, and the content delivery nodes3. CDN is mainly used for content distribution, such as static web pages, images, videos, and downloads3. CDN is not suitable for storing logs, as it does not provide data durability or lifecycle management.
Container Service is a high-performance and scalable container application management service that enables you to use Docker and Kubernetes to manage the lifecycle of containerized applications4. Container Service is mainly used for deploying and orchestrating microservices, serverless applications, and big data applications4. Container Service is not suitable for storing logs, as it does not provide data durability or lifecycle management.
ApsaraDB for RDS (Relational Database Service) is a stable and reliable online database service that supports MySQL, SQL Server, PostgreSQL, MariaDB, and PPAS5. ApsaraDB for RDS is mainly used for storing and processing structured data, such as user information, transaction records, and product catalogs5. ApsaraDB for RDS is not suitable for storing logs, as it is more expensive and less scalable than OSS.
Reference: Object Storage Service (OSS) – Alibaba Cloud, Lifecycle management – Object Storage Service – Alibaba Cloud Documentation Center, Content Delivery Network (CDN) – Alibaba Cloud, Container Service – Alibaba Cloud, ApsaraDB for RDS – Alibaba Cloud
There are two types of Alibaba Cloud SLB: private network SLB and public network SLB. You can freely choose between private network SLB and public network SLB based on your business scenarios. Alibaba Cloud will assign a private or public IP address to your SLB according to your choice.
- A . TRUE
- B . FALSE
A
Explanation:
Alibaba Cloud SLB allows users to select between private and public SLB based on business needs. A public SLB provides a public IP address for Internet-facing applications, while a private SLB provides a private IP address for internal applications within a VPC. Alibaba Cloud assigns the appropriate IP type automatically based on the user’s selection of SLB type.
Reference: Alibaba Cloud SLB Types and IP Assignment