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Alibaba Cloud ACA-Cloud1 (ACA Cloud Computing Associate) Certification Exam is a valuable certification program that validates the skills and knowledge of professionals in cloud computing. ACA-Cloud1 exam covers a wide range of topics related to Alibaba Cloud's cloud computing services and solutions and is designed to test the candidate's ability to design, deploy, and manage cloud computing solutions. ACA-Cloud1 exam is available in multiple languages and can be taken online or in person at a designated testing center.
Alibaba Cloud ACA-Cloud1 Exam is an excellent opportunity for IT professionals to validate their skills in cloud computing and gain recognition for their expertise. ACA Cloud Computing Associate certification is highly valued by employers and can lead to better job opportunities and higher salaries. The ACA-Cloud1 Exam is also a great way for IT professionals to stay updated with the latest cloud computing trends and technologies, as the exam is regularly updated to reflect changes in the industry.
NEW QUESTION # 11
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. Private-read
- B. Private
- C. Public-read-write
- D. Public-read
Answer: B,C,D
NEW QUESTION # 12
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. Open a ticket to Alibaba Cloud help desk.
- B. Check ECS or CloudMonitor product documents.
- C. Look for answers in Alibaba Cloud forum.
- D. You cannot obtain any help from Alibaba Cloud.
Answer: A,B,C
NEW QUESTION # 13
When we talk about the 'Elastic' feature for ECS product, we are not talking about _____________.
- A. Elastic Computing
- B. Elastic Administration
- C. Elastic Storage
- D. Elastic Network
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION # 14
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 have the same configuration
- B. All ECS instances under the same SLB instance must be running on the same operating system
- C. All backend servers under the same SLB instance must be in the same Scaling Group
- D. SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
Answer: D
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 # 15
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. FALSE
- B. TRUE
Answer: B
Explanation:
Explanation
Server Load Balancer (SLB) is a service that distributes traffic among multiple ECS instances to improve the service capabilities of applications. SLB monitors the health of ECS instances in real time and automatically isolates unhealthy instances from the server pool according to the configured health check policy. This ensures that the traffic is only forwarded to healthy instances, thereby improving the availability and fault tolerance of applications. References: ACA Cloud Computing Certification - Alibaba Cloud Academy, E-Learning Courses
- Alibaba Cloud Academy, Server Load Balancer - Alibaba Cloud Documentation Center
NEW QUESTION # 16
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 have the same configuration
- B. All ECS instances under the same SLB instance must be running on the same operating system
- C. All backend servers under the same SLB instance must be in the same Scaling Group
- D. SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
Answer: D
NEW QUESTION # 17
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 Self-Diagnostic
- B. Elastic Self-Health
- C. Elastic Scale-In
- D. Elastic Scale-Out
Answer: A
NEW QUESTION # 18
Which of the following ECS instance configurations can't be changed if we don't change instance type?
- A. Mem size
- B. Data disk size
- C. System disk size
- D. Number of data disk
Answer: A
Explanation:
Explanation
= A is the correct answer because the memory size of an ECS instance is determined by the instance type, and it cannot be changed independently. If you want to change the memory size of an ECS instance, you must change the instance type to another one that has a different memory size12 B, C, and D are incorrect answers because the system disk size, data disk size, and number of data disks of an ECS instance can be changed without changing the instance type. You can use the ECS console or API to resize the system disk or data disks of an ECS instance, or add or remove data disks from an ECS instance3456 References: 1: Overview of instance families 2: Change the instance type 3: Resize disks 4: Resize a disk 5: Attach or detach data disks 6: Attach or detach a data disk
NEW QUESTION # 19
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 Self-Diagnostic
- B. Elastic Self-Health
- C. Elastic Scale-In
- D. Elastic Scale-Out
Answer: A
Explanation:
Reference:
https://www.alibabacloud.com/product/auto-scaling
NEW QUESTION # 20
In which of the following cases would you need to apply an ICP license? (Choose three.)
- A. Launch your website in China
- B. Open your office in China
- C. Launch your online shop in China
- D. Accelerate your Overseas Website in China
Answer: A,B,C
NEW QUESTION # 21
You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)
- A. ECS
- B. RDS
- C. MaxCompute
- D. SLB
- E. OSS
Answer: A,B,E
NEW QUESTION # 22
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. Pictures on server
- B. Confidential files on the server
- C. Database
- D. Web application
Answer: C
Explanation:
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.
NEW QUESTION # 23
Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean?
- A. ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
- B. Server Load Balancer can be deployed for ECS instances in various regions.
- C. ECS instances in different regions cannot communicate with each other on the intranet.
- D. Server Load Balancer cannot be deployed for ECS instances in various regions.
Answer: B
Explanation:
Explanation
Alibaba Cloud does not support intranet communication between products that are not in the same region, which means that ECS instances in different regions cannot communicate with each other on the intranet, and ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet. However, this does not mean that Server Load Balancer cannot be deployed for ECS instances in various regions. Server Load Balancer is a service that distributes traffic among multiple ECS instances according to the configured forwarding rules. It can be used to balance the load and improve the service availability and fault tolerance of applications. Server Load Balancer supports cross-region deployment, which means that it can distribute traffic to ECS instances in different regions12. References: 1: ACA Cloud Computing Exam Preparation Course - Alibaba Cloud3 2: Server Load Balancer - Alibaba Cloud Documentation Center4
NEW QUESTION # 24
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.
Answer: B,D
NEW QUESTION # 25
Some applications may encounter large traffic fluctuations within a short period. When ECS is used with
, the number of ECS instances is automatically adjusted based on traffic.
- A. OSS
- B. Auto Scaling
- C. RDS
- D. Server Load Balancer
Answer: B
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/25371.htm
NEW QUESTION # 26
A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located installed 35 HD cameras to monitor the major exits. The surveillance system is deployed on an ECS instance, which has four 2 TB data disks to store video data.
However, video data grows rapidly and the engineers find that the ECS will run out of storage space within 2 weeks.
In this case, product is thought to be the best solution for addressing the storage challenge while ensuring quick access to historical video data when needed.
- A. CDN
- B. ECS
- C. Container Service
- D. OSS
Answer: D
NEW QUESTION # 27
Which of the following statements is true for RDS?
- A. Multiple databases can be created in one RDS instance.
- B. Resources are not shared among the databases in the same RDS instance.
- C. None of the above is true.
- D. Databases with the same name are allowed in the same instance.
Answer: A
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/26092.htm
NEW QUESTION # 28
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. Ten
- B. Eight
- C. Six
- D. Five
Answer: A
Explanation:
Explanation
Alibaba Cloud Auto Scaling service allows you to automatically adjust the number of ECS instances in a scaling group based on your business needs and scaling policies. You can set the minimum and maximum number of instances in a scaling group to limit the range of scaling actions1. When you create a scaling rule, you can specify the number of instances to be added or removed, or the expected number of instances after the scaling action2. You can also create a scheduled task to execute a scaling rule at a specified time or periodically3.
In this question, the customer sets the minimum number of instances to 6 and the maximum number of instances to 8 in the scaling group. This means that the scaling group will always have at least 6 instances and at most 8 instances. The customer also adds a scaling rule to remove 5 instances, and creates a scheduled task based on this rule. However, this scaling rule will not be executed if it violates the minimum and maximum limits of the scaling group. Therefore, when the scheduled task is activated once, the scaling group will only remove 2 instances, which is the difference between the current number of instances (8) and the minimum number of instances (6). The remaining number of instances in the scaling group will be 6, which is the correct answer. References: 1: Create a scaling group - Auto Scaling - Alibaba Cloud Documentation Center2: Create a scaling rule - Auto Scaling - Alibaba Cloud Documentation Center3: Create a scheduled task - Auto Scaling
- Alibaba Cloud Documentation Center.
NEW QUESTION # 29
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The ACA-Cloud1 certification is recognized globally and is a valuable credential for individuals who are interested in pursuing a career in cloud computing. It not only validates the skills and knowledge of an individual but also demonstrates their commitment to keeping up with the latest developments in the field. ACA Cloud Computing Associate certification is also a testament to an individual’s dedication to their career and their willingness to invest time and effort in developing their skills.
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