[Mar 05, 2024] ACA-Cloud1 Test Prep Training Practice Exam Questions Practice Tests
Exam Questions Answers Braindumps ACA-Cloud1 Exam Dumps PDF Questions
The ACA-Cloud1 certification exam is intended for individuals who are interested in pursuing a career in cloud computing, as well as IT professionals who are seeking to expand their knowledge and skills in this area. ACA Cloud Computing Associate certification is particularly well-suited for those who are working with Alibaba Cloud services, as it provides a comprehensive understanding of the platform and its capabilities.
The ACA-Cloud1 certification exam covers a wide range of topics related to cloud computing, including cloud architecture, cloud security, cloud computing models, and cloud deployment models. ACA-Cloud1 exam is composed of multiple-choice questions that assess the candidate's understanding of these topics. ACA-Cloud1 exam can be taken online or at an authorized testing center.
To prepare for the ACA-Cloud1 exam, candidates can take advantage of a variety of resources, including online training courses, practice exams, and study guides. Alibaba Cloud offers a comprehensive training program that covers all the topics included in the exam. The training program includes video lectures, hands-on labs, and quizzes to help candidates prepare for the exam. Additionally, there are many third-party resources available online that provide study materials and practice exams to help candidates prepare.
NEW QUESTION # 40
ECS can be used along with_____to store static images, videos, and reducing storage fees.
- A. VPC
- B. OSS
- C. RDS
- D. Server Load Balancer
Answer: B
NEW QUESTION # 41
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 file system
- C. a Linux file system
- D. a double copy distributed system
Answer: A
Explanation:
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.
NEW QUESTION # 42
Multiple lower-configuration I/O-optimized ECS instances can be used with to deliver a high- availability architecture.
- A. Auto Scaling
- B. OSS
- C. Server Load Balancer
- D. RDS
Answer: C
NEW QUESTION # 43
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. Anti-DDoS Basic Service
- B. CloudMonitor
- C. Situation Awareness
- D. Server Guard
Answer: D
Explanation:
Explanation/Reference: https://www.alibabacloud.com/blog/blogblogalibaba-cloud-server-guard-a-comprehensive- assessment_284390
NEW QUESTION # 44
Company builds a music download website based on OSS and ECS, and users can download mp3 files after registering for the website. Recently, the public network traffic to the OSS has doubled but the increase of registered users is less than 10%. After in-depth analysis, engineers find that many user download requests are raised from search engine but not the website itself. In this case, which of the following measures is thought to be able to address this issue.
- A. Limits access sources by configuring "Anti-leech settings" of OSS bucket attributes.
- B. Migrates music files from the OSS to the data disks for ECS instances.
- C. Introduce SLB for extra protection.
- D. Changes the website access mode to HTTPS.
Answer: A
Explanation:
Explanation
The issue that Company B faces is that their music files stored in OSS are being downloaded by unauthorized users who access them through search engines, rather than through their website. This is called leeching, which is a form of bandwidth theft that consumes the OSS traffic and increases the cost for Company B. To address this issue, Company B can limit the access sources by configuring the "Anti-leech settings" of OSS bucket attributes. Anti-leech settings allow the bucket owner to specify a referer whitelist, which is a list of domain names that are allowed to access the OSS resources. The referer is a part of the HTTP header that indicates the source URL of the request. By setting a referer whitelist, Company B can prevent leeches from accessing their music files directly from search engines or other websites, and only allow access from their own website domain name. This way, Company B can protect their OSS resources from unauthorized access and reduce their OSS traffic costs. The other options are not effective or relevant for addressing the issue.
Migrating music files from OSS to data disks for ECS instances would increase the storage and computing costs for Company B, and also reduce the scalability and availability of their music files. Changing the website access mode to HTTPS would enhance the security and encryption of the website, but it would not prevent leeches from accessing the OSS resources through search engines. Introducing SLB for extra protection would improve the load balancing and high availability of the ECS instances, but it would not affect the access control of the OSS resources. References: OSS Anti-Leech Referer Configuration and Error Elimination
NEW QUESTION # 45
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. Confidential files on the server
- D. Pictures on server
Answer: B
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 # 46
RDS provides whitelist access policies. You can set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
Explanation/Reference: https://apsarastackdocument.oss-cn-hangzhou.aliyuncs.com/01_ApsaraStackEnterprise/V3.5.2- intl-en/Alibaba%20Cloud%20Apsara%20Stack%20Enterprise%201808%20Security%20Whitepaper%20-%
2020180831.pdf
NEW QUESTION # 47
is a ready-to-use service that seamlessly integrates with Elastic Compute Service (ECS) to manage varying traffic levels without manual intervention.
- A. VPC
- B. OSS
- C. Server Load Balancer
- D. RDS
Answer: C
Explanation:
Explanation
Server Load Balancer (SLB) is a ready-to-use service that seamlessly integrates with Elastic Compute Service (ECS) to manage varying traffic levels without manual intervention. SLB distributes incoming traffic among multiple ECS instances according to the configured forwarding rules, increasing the service capabilities and fault tolerance of your applications1. SLB supports Layer-4 (TCP/UDP) and Layer-7 (HTTP/HTTPS) load balancing, health checks, session persistence, cross-zone disaster recovery, and other advanced features2.
References: 1: Alibaba Cloud Academy, "Server Load Balancer",
https://edu.alibabacloud.com/elearning/lesson/ACA-Cloud-Computing-Certification/lesson-4-server-load-balanc Alibaba Cloud, "What is Server Load Balancer?", https://www.alibabacloud.com/help/doc-detail/27539.htm
NEW QUESTION # 48
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. SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
- C. All backend servers under the same SLB instance must be in the same Scaling Group
- D. All ECS instances under the same SLB instance must be running on the same operating system
Answer: B
Explanation:
Reference:
https://www.alibabacloud.com/blog/comprehensive-upgrade-of-alibaba-cloud-auto-scaling- product_594112
NEW QUESTION # 49
In which of the following cases would you need to apply an ICP license? (Choose three.)
- A. Launch your website in China
- B. Launch your online shop in China
- C. Open your office in China
- D. Accelerate your Overseas Website in China
Answer: A,B,C
Explanation:
Explanation/Reference: https://www.alibabacloud.com/icp
NEW QUESTION # 50
Which 2 OSS object types can be configured as parameter for object lifecycle management? (Choose two.)
- A. Snapshot
- B. Infrequent access
- C. Chunk
- D. Archive
Answer: B,D
NEW QUESTION # 51
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. Check ECS or CloudMonitor product documents.
- C. Open a ticket to Alibaba Cloud help desk.
- D. You cannot obtain any help from Alibaba Cloud.
Answer: A,B,C
Explanation:
Explanation
Alibaba Cloud Monitor service is a service that monitors the running status of Alibaba Cloud resources and custom metrics, and provides alert notifications and data visualization features. A user receives an alert saying that the IOPS utilization rate for an ECS instance exceeds 80%, which means that the disk performance of the instance is reaching its limit and may affect the application performance. To handle the situation, the user may obtain help from Alibaba Cloud through the following methods:
Check ECS or CloudMonitor product documents: The user can check the official documentation of ECS or CloudMonitor to learn more about the concepts, features, operations, and best practices of these services. For example, the user can find the information about how to view the IOPS utilization rate of an ECS instance, how to optimize the disk performance of an ECS instance, and how to configure alert rules for CloudMonitor.
Open a ticket to Alibaba Cloud help desk: The user can open a ticket to Alibaba Cloud help desk to get technical support from Alibaba Cloud engineers. The user can choose the ticket type, severity, and product, and describe the problem in detail. The user can also attach screenshots or logs to the ticket to help the engineers diagnose the problem. The user can track the status and response of the ticket in the console.
Look for answers in Alibaba Cloud forum: The user can look for answers in Alibaba Cloud forum, which is a platform where Alibaba Cloud users can share their experiences, ask questions, and discuss topics related to Alibaba Cloud products and services. The user can search for relevant keywords or tags, browse the existing threads, or post a new question in the forum. The user can also interact with other users or Alibaba Cloud experts in the forum.
D. You cannot obtain any help from Alibaba Cloud is not a correct answer, as Alibaba Cloud provides various ways to help its users with their problems and questions. References: : [What is CloudMonitor? - CloudMonitor - Alibaba Cloud Documentation Center]. : [View the IOPS utilization of an ECS instance - CloudMonitor - Alibaba Cloud Documentation Center]. : [Optimize the disk performance of an ECS instance - Elastic Compute Service - Alibaba Cloud Documentation Center]. : [Configure alert rules - CloudMonitor - Alibaba Cloud Documentation Center].
NEW QUESTION # 52
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. SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
- C. All backend servers under the same SLB instance must be in the same Scaling Group
- D. All ECS instances under the same SLB instance must be running on the same operating system
Answer: B
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 # 53
RDS provides whitelist access policies. You can set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
Explanation
A is the correct answer because RDS provides whitelist access policies that allow you to set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.
A whitelist is a security feature that specifies the IP addresses or CIDR blocks that are allowed to access your RDS instance. By default, the whitelist is empty, which means that no IP address can access your RDS instance. You can add IP addresses or CIDR blocks to the whitelist according to your business needs. You can also create multiple whitelist groups and assign different IP addresses or CIDR blocks to each group. This can help you manage the access permissions of different users or applications12 References: 1: Configure a whitelist 2: ApsaraDB RDS:Configure an IP address whitelist
NEW QUESTION # 54
You can retrieve data directly from an ECS Image and use it right away.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
Explanation
An ECS image is a copy of data from one or more disks that are attached to an ECS instance. You cannot retrieve data directly from an ECS image and use it right away. You need to create an ECS instance from the image first, and then access the data on the disks of the instance. References: Elastic Compute Service:Image overview
NEW QUESTION # 55
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