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Alibaba ACA-Cloud1 Exam Questions
- Topic 1: Aware of main application scenarios of Alibaba Cloud Computing-related products and how they shall be used together
- Topic 2: Alibaba Cloud Security services and CloudMonitor/ Familiar with the concepts of Alibaba Cloud Computing related products
- Topic 3: Familiar with features of Alibaba Cloud Computing-related products and key product implementation principles/ We strongly recommend you register an Alibaba Cloudaccount and try the products directly/ Familiar with operations of Alibaba Cloud Computing-related products
- Topic 4: Rudimentary knowledge of network security/ Cloud Computing and Network Security
- Topic 5: creating, configuring, starting and stopping and deleting a service instance/ Has knowledge in the use and operation of Alibaba Cloud's ECS, Server Load Balancers
- Topic 6: Familiar with common network protocols such as HTTP, FTP, TCP, UDP and ICMP/ Familiar with software development lifecycle
- Topic 7: Able to discover and resolve common issues emergedduring the use of Alibaba Cloud Computing-related products
- Topic 8: develop general solutions and enterprise best practices based on Alibaba Cloud's products and business needs
Free Alibaba ACA-Cloud1 Exam Actual Questions
Note: Premium Questions for ACA-Cloud1 were last updated On Mar. 07, 2026 (see below)
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, 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 = 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.
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. It supports adding an existing ECS instance into the scaling group but imposes certain requirements on instance region. In this case, which of the following statements is true?
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies.It can help you cope with traffic spikes, reduce costs, and improve service availability1.Auto Scaling supports adding an existing ECS instance into the scaling group, which is a collection of ECS instances that share the same scaling configuration and scaling rules2.However, the existing ECS instance must meet certain requirements, one of which is that the instance and the scaling group must be in the same region3. A region is a physical location where Alibaba Cloud deploys its data centers.Each region consists of multiple isolated zones that have independent power grids and networks4. Therefore, the instance and the scaling group do not have to be in the same zone, as long as they are in the same region.
You can an ECS instance's configuration. (Choose two.)
You can upgrade or downgrade an ECS instance's configuration to meet your business needs. Upgrading an instance's configuration means increasing the vCPUs, memory, bandwidth, or disk capacity of the instance. Downgrading an instance's configuration means decreasing the vCPUs, memory, bandwidth, or disk capacity of the instance.You can change the configuration of an ECS instance by using one of the following methods1:
Change the instance type: You can change the instance type of an ECS instance to adjust the vCPUs and memory of the instance.You can change the instance type of an ECS instance in the following scenarios2:
The instance is in theStoppedstate and uses apay-as-you-gobilling method.
The instance is in theRunningstate and uses asubscriptionbilling method, and the new instance type belongs to the same instance family as the original instance type.
Change the bandwidth configuration: You can change the bandwidth configuration of an ECS instance to adjust the network performance of the instance.You can change the bandwidth configuration of an ECS instance in the following scenarios3:
The instance is in theStoppedstate and uses apay-as-you-gobilling method, and the instance is not associated with an EIP.
The instance is in theRunningstate and uses asubscriptionbilling method, and the instance is not associated with an EIP.
Change the system disk or data disk: You can change the system disk or data disk of an ECS instance to adjust the disk capacity or performance of the instance.You can change the system disk or data disk of an ECS instance in the following scenarios4:
The instance is in theStoppedstate and uses apay-as-you-gobilling method, and the disk is not encrypted.
The instance is in theRunningstate and uses asubscriptionbilling method, and the disk is not encrypted.Reference:1:Overview of instance configuration changes - Alibaba Cloud2:Change the instance type of an ECS instance - Alibaba Cloud3:Change the bandwidth configuration of an ECS instance - Alibaba Cloud4:Change the system disk or data disk of an ECS instance - Alibaba Cloud.
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?
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