Latest [Apr 27, 2025] Realistic Verified ACA-Cloud1 Dumps
Pass Alibaba Cloud ACA-Cloud1 Exam Updated 74 Questions
Preparing for the ACA-Cloud1 exam requires a solid understanding of cloud computing concepts and Alibaba Cloud products and services. Alibaba Cloud offers a range of training courses and resources to help candidates prepare for the exam, including online training courses, practice exams, and study guides.
NEW QUESTION # 20
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 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.
- B. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
- C. Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
- D. Import data into OSS to share the storage load of the platform.
Answer: A,B
NEW QUESTION # 21
Server Load Balancer can help protect fromattack.
- A. SQL injection
- B. Virus
- C. DDoS
- D. Ransomware
Answer: C
Explanation:
Explanation
Server Load Balancer (SLB) can help protect from distributed denial-of-service (DDoS) attacks by distributing network traffic across groups of backend servers to improve the service capability and application availability. SLB also supports built-in Anti-DDoS services to ensure business security. Anti-DDoS services can mitigate DDoS attacks at the Tbit/s level and provide multiple defense methods, such as blackhole filtering, traffic scrubbing, and access control1. In addition, you can integrate Application Load Balancer (ALB) with Web Application Firewall (WAF) in the console to ensure security at the application layer and prevent attacks such as SQL injection2. References: 1: Server Load Balancer(SLB) - Alibaba Cloud2: Associate an EIP protected by Anti-DDoS Pro/Premium with an ALB instance - Server Load Balancer - Alibaba Cloud Documentation Center.
NEW QUESTION # 22
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. Auto Scaling
- B. OSS
- C. Server Load Balancer
- D. RDS
Answer: A
Explanation:
Explanation
According to the Alibaba Cloud Academy, Auto Scaling is a service that automatically creates and releases ECS instances based on pre-defined rules in order to scale services to match demand. Furthermore, it can configure server load balancer and relational database service white lists, without any manual intervention.
Therefore, when ECS is used with Auto Scaling, the number of ECS instances is automatically adjusted based on traffic. References: Introduction to Alibaba Auto Scaling - Cloud Academy, ACA Cloud Computing Exam Preparation Course - Alibaba Cloud, Module 4: Cloud Computing Elasticity, Lesson 1: Auto Scaling, Slide 2.
NEW QUESTION # 23
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. FALSE
- B. TRUE
Answer: A
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 # 24
ECS can be used along with to store static images, videos, and reducing storage fees.
- A. OSS
- B. VPC
- C. Server Load Balancer
- D. RDS
Answer: A
Explanation:
Reference:
http://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/DNA0011858383_en- US_intl_190320132947_public_91775d442a4b315acafcb25df8bcc84f.pdf
NEW QUESTION # 25
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. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
- B. 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.
- C. Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
- D. Import data into OSS to share the storage load of the platform.
Answer: B,C
Explanation:
Explanation
A and C are the correct answers because they can improve the performance of the platform by reducing the load on the ECS instances and the database server.
A is correct because using CDN can accelerate the delivery of static content such as CSS and JavaScript files, which can reduce the bandwidth consumption and latency of the ECS instances. CDN can also cache the content in edge nodes closer to the end users, which can improve the user experience and response time of the platform1 C is correct because using RDS can replace the existing self-built database, which can provide better database performance, reliability, security, and scalability. RDS can also handle the backup, recovery, monitoring, and maintenance of the database, which can reduce the management overhead and cost of the platform. Moreover, creating RDS read-only instances can handle read-only requests, which can reduce the workload on the master RDS instance and improve the database availability and performance23 References: 1: CDN Overview 2: RDS Overview 3: RDS Read-only Instances
NEW QUESTION # 26
Which of the following statements to OSS bucket is not correct?
- A. Every user can create more than one bucket
- B. Bucket name can be changed after creation
- C. Every bucket should have a unique name
- D. There is no limitation to objects number inside one bucket
Answer: B
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/31885.htm?spm=a2c63.p38356.a3.3.43f03bb9a3KjLl
NEW QUESTION # 27
When using Alibaba Cloud OSS, you can set access control in 3 different levels, which are (Choose three.)
- A. Directory level
- B. Object level
- C. Bucket level
- D. RAM account level
Answer: B,C,D
Explanation:
Explanation
When using Alibaba Cloud OSS, you can set access control in three different levels, which are bucket level, object level, and RAM account level. Bucket level access control is the highest level of access control, which determines whether a user can access the bucket and its objects. Bucket level access control can be set to public read/write, public read, or private. Object level access control is the second level of access control, which determines whether a user can access a specific object in the bucket. Object level access control can be set to inherit from the bucket, public read/write, public read, or private. RAM account level access control is the lowest level of access control, which determines whether a user can perform certain operations on the bucket or the object. RAM account level access control can be set by using RAM policies, which specify the actions, resources, and conditions for the access. References: Object Storage Service (OSS) - Alibaba Cloud Academy, Access Control - Alibaba Cloud Documentation Center
NEW QUESTION # 28
Using a cloud computing service is simple and straightforward. One can choose the instance with desired specification, finish payment and then use it right away. Moreover, the underlying physical machines are managed by cloud service providers and transparent to users.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
Explanation
Using a cloud computing service is simple and straightforward. One can choose the instance with desired specification, finish payment and then use it right away. Moreover, the underlying physical machines are managed by cloud service providers and transparent to users. This is the basic concept of cloud computing, which provides on-demand, scalable, and reliable computing resources and services over the internet12.
References: 1: ACA Cloud Computing Exam Preparation Course - Alibaba Cloud3 2: What Is Alibaba Cloud Academy Certification?4
NEW QUESTION # 29
When we talk about the 'Elastic' feature for ECS product, we are not talking about.
- A. Elastic Computing
- B. Elastic Storage
- C. Elastic Administration
- D. Elastic Network
Answer: C
NEW QUESTION # 30
A/An is a copy of data on a disk at a certain point in time.
- A. template
- B. image
- C. EIP
- D. snapshot
Answer: D
NEW QUESTION # 31
Alibaba Cloud provides anti-DDoS products of different levels. If the service availability needs to be kept at 99.9% or higher under DDoS attacks, which of the following is the MOST suitable product?
- A. Managed Security Service
- B. Anti-DDoS Service Pro
- C. Situation Awareness
- D. Anti-DDoS Service Basic
Answer: D
Explanation:
Reference:
https://www.alibabacloud.com/product/anti-ddos
NEW QUESTION # 32
Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. One of the special characteristics of OSS is its superior data reliability, because of its underlying backup technology and policies. Which of the following statement about OSS backup is correct?
- A. OSS leverages RAID0+1 configuration of its underlying physical hard disks. There is no impact even if
2 hard disks were to fail simultaneously. - B. OSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.
- C. OSS supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.
- D. Customer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.
Answer: D
NEW QUESTION # 33
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. 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.
- B. 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.
- C. 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.
- D. 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.
Answer: A,C,D
Explanation:
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
NEW QUESTION # 34
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 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.
- B. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
- C. Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
- D. Import data into OSS to share the storage load of the platform.
Answer: A,B
NEW QUESTION # 35
A/Anis a copy of data on a disk at a certain point in time.
- A. template
- B. image
- C. EIP
- D. snapshot
Answer: D
Explanation:
Explanation
A snapshot is a copy of data on a disk at a certain point in time. It is used to back up and restore data, or create custom images. Snapshots can capture the data of system disks, data disks, and shared block storage devices1.
References: 1: Alibaba Cloud Academy, "Snapshot",
https://edu.alibabacloud.com/elearning/lesson/ACA-Cloud-Computing-Certification/lesson-3-snapshot
NEW QUESTION # 36
Alibaba Cloud China Connect is a service that can help international companies do business in China. Which of the following services is not included in China Connect?
- A. Web hosting
- B. Connect your service with Alibaba Group ecosystem
- C. ICP Support
- D. Office registration support
Answer: A
Explanation:
Explanation
Alibaba Cloud China Connect is a service that can help international companies do business in China by providing them with the necessary infrastructure, compliance, and ecosystem support1. China Connect includes the following services1:
ICP Support: Alibaba Cloud helps you obtain the Internet Content Provider (ICP) license, which is required for any website hosted in mainland China.
Office registration support: Alibaba Cloud helps you register a legal entity in mainland China, which is required for some business scenarios such as e-commerce, online payment, and social media.
Connect your service with Alibaba Group ecosystem: Alibaba Cloud helps you leverage the Alibaba Group ecosystem, which includes platforms such as Taobao, Tmall, Alipay, and DingTalk, to reach millions of potential customers and partners in China.
However, China Connect does not include web hosting, which is a service that allows you to store and deliver your website content on Alibaba Cloud servers. Web hosting is a separate service that you can purchase from Alibaba Cloud, and it is not part of China Connect.
References: 1: Alibaba Cloud, "China Connect", https://www.alibabacloud.com/chinaconnect
NEW QUESTION # 37
What is the full name of ECS?
- A. Elastic Cost Server
- B. Elastic Communication Server
- C. Elastic Computing Server
- D. Elastic Compute Service
Answer: D
NEW QUESTION # 38
In mainland China, the approval requirements for business record filing vary depending on provincial communication management bureaus.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
Explanation
According to the Alibaba Cloud Academy, business record filing is a process of registering your website information with the provincial communication management bureau where your server is located. The approval requirements for business record filing vary depending on provincial communication management bureaus. Some provinces may require additional materials or procedures for business record filing. Therefore, the statement is true. References: ACA Cloud Computing Exam Preparation Course - Alibaba Cloud, Module
2: Cloud Computing Security, Lesson 2: Business Record Filing, Slide 3.
NEW QUESTION # 39
Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean ?
- A. ECS instances in different regions cannot communicate with each other on the intranet.
- B. Server Load Balancer can be deployed for ECS instances in various regions.
- C. ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
- D. Server Load Balancer cannot be deployed for ECS instances in various regions.
Answer: C
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/40654.htm
NEW QUESTION # 40
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
Answer: A
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 # 41
Multiple lower-configuration I/O-optimized ECS instances can be used withto deliver a high- availability architecture.
- A. Server Load Balancer
- B. Auto Scaling
- C. OSS
- D. RDS
Answer: A
NEW QUESTION # 42
___________ feature in Server Load Balancer means that it can forward the access requests from a single user to the same ECS instance within a certain period to ensure session continuity.
- A. health check
- B. least connections scheduling
- C. Weighted Round Robin
- D. session persistence
Answer: D
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/55202.htm
NEW QUESTION # 43
Cloud disks are reliable because they use __________ to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
- A. a Linux file system
- B. a file system
- C. a double copy distributed system
- D. a distributed file management system with 3 redundant copies
Answer: D
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.
Reference: http://docs-aliyun.cn-hangzhou.oss.aliyun-inc.com/pdf/ecs-product-introduction-intl-en-2017-03-
24.pdf
NEW QUESTION # 44
Server Load Balancer can manage sudden spikes in traffic, minimize response time and maintain 99.99% availability of your web application.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
Manage sudden spikes in traffic, minimize response time and maintain 99.99% availability of your web application with Server Load Balancer.
Reference: https://arcelon.co.id/product/server_load_balancer.php
NEW QUESTION # 45
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The ACA-Cloud1 exam is an online exam that is conducted by Alibaba Cloud. ACA-Cloud1 exam consists of 50 multiple-choice questions that are to be completed within 90 minutes. ACA-Cloud1 exam is available in both English and Chinese languages. The passing score for the ACA-Cloud1 exam is 60%, and the exam fee is USD 120.
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.
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