[Feb 25, 2025] ACA-Cloud1 Practice Exam Dumps – 99% Marks In Alibaba Cloud Exam [Q42-Q62]

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[Feb 25, 2025] ACA-Cloud1 Practice Exam Dumps – 99% Marks In Alibaba Cloud Exam

Updated Verified ACA-Cloud1 Q&As – Pass Guarantee or Full Refund

NEW QUESTION 42
Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)

snapshot duplicate

snapshot rollback

snapshot download

snapshot deletion

Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/52045.htm#section-1ff-9s6-3i5

NEW QUESTION 43
You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)

RDS

SLB

ECS

MaxCompute

OSS

Reference:
http://docs-aliyun.cn-hangzhou.oss.aliyun-inc.com/pdf/slb-faq-intl-en-2017-03-29.pdf

NEW QUESTION 44
Your website has oscillating traffic peaks that are difficult to predict in advance. In this scenario, it is recommended to use SLB andtogether with ECS.

RDS

Auto Scaling

VPC

MaxCompute

NEW QUESTION 45
Server Load Balancer can help protect fromattack.

DDoS

Virus

Ransomware

SQL injection

NEW QUESTION 46
When we talk about the ‘Elastic’ feature for ECS product, we are not talking about _____________.

Elastic Computing

Elastic Storage

Elastic Network

Elastic Administration

Explanation/Reference:

NEW QUESTION 47
You are developing a highly available web application using stateless web servers. Which services are suitable for storing session state data? (Choose two.)

RDS

Table Store

MaxCompute

OSS

Explanation
Session state data is the information that is associated with a specific user session, such as user preferences, shopping cart items, authentication tokens, etc. Session state data needs to be stored in a persistent and scalable way, so that it can be accessed by multiple web servers and survive server failures. Therefore, the suitable services for storing session state data are those that provide reliable, distributed, and high-performance data storage, such as RDS and Table Store.
RDS (Relational Database Service) is a fully managed online database service that supports various database engines, such as MySQL, SQL Server, PostgreSQL, MariaDB, and PPAS (PostgreSQL with Oracle compatibility)1. RDS provides high availability, backup and recovery, security, and monitoring features for your databases. RDS can store session state data in relational tables, and you can use SQL queries to access and manipulate the data.
Table Store is a fully managed NoSQL database service that provides consistent, scalable, and high-performance data storage for structured and semi-structured data2. Table Store organizes data in tables, rows, and columns, and supports primary key and attribute columns. Table Store can store session state data in flexible schemas, and you can use primary key queries or secondary index queries to access and manipulate the data.
References: 1: Alibaba Cloud Academy, “RDS Concepts”,
https://edu.alibabacloud.com/elearning/lesson/ACA-Cloud-Computing-Certification/lesson-5-rds-concepts 2:
Alibaba Cloud Academy, “Table Store”,
https://edu.alibabacloud.com/elearning/lesson/ACA-Cloud-Computing-Certification/lesson-7-table-store

NEW QUESTION 48
Anti-DDoS is one of the major features in Alibaba Cloud Security Service. Many websites have experienced different types of DDoS attacks, an accurate understanding of DDoS is crucial to protecting websites. Which of the following descriptions about DDoS attack is the most accurate one?

The main target for DDoS attack is the database.

DDoS attack will try to crack the password through a large number of attempts.

The main purpose of DDoS attack is to make the target server unable to provide service normally, which is one of the network attacks that are most difficult to defend.

The purpose of DDoS attack is to steal confidential information.

NEW QUESTION 49
Your website has oscillating traffic peaks that are difficult to predict in advance. In this scenario, it is recommended to use SLB andtogether with ECS.

RDS

Auto Scaling

VPC

MaxCompute

Explanation
Your website has oscillating traffic peaks that are difficult to predict in advance. In this scenario, it is recommended to use SLB and Auto Scaling together with ECS. SLB 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. Auto Scaling is a service that automatically adjusts computing resources based on your volume of user requests. When the demand for computing resources increases, Auto Scaling automatically adds ECS instances to serve additional user requests, or alternatively removes instances in the case of decreased user requests. By using SLB and Auto Scaling together with ECS, you can achieve high scalability and elasticity for your website, and cope with the changing traffic patterns12. References: 1: ACA Cloud Computing Exam Preparation Course – Alibaba Cloud3 2: Auto Scaling: Automatically Adjusts Computing Resources – Alibaba Cloud4

NEW QUESTION 50
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?

Web application

Database

Confidential files on the server

Pictures on server

Explanation/Reference: https://www.rapid7.com/fundamentals/sql-injection-attacks/

NEW QUESTION 51
Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean?

ECS instances in different regions cannot communicate with each other on the intranet.

ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.

Server Load Balancer cannot be deployed for ECS instances in various regions.

Server Load Balancer can be deployed for ECS instances in various regions.

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 52
Your website has high volume of traffic and sudden spikes for a very short time. In this scenario,
______________ can manage traffic peak efficiently and maintain a consistent user experience.

Server Load Balancer

Auto Scaling

RDS

VPC

Explanation/Reference: https://www.alibabacloud.com/blog/designing-a-cloud-based-architecture-for-internet-of-vehicles- iov-series-ii_594263

NEW QUESTION 53
Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. OSS is superior than self-built storage in all these aspects. Which of the following advantage relates to the high availability of OSS?

Availability actually relies on the underlying hardware, which can break down easily. Once the hard disk malfunctions, it can also lead to permanent data loss.

Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.

Data has to be backed up by customer manually, which is time-consuming and labor-intensive.

The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti- leech URL, and Master-Sub Account

Explanation/Reference: https://www.alibabacloud.com/blog/alibaba-cloud-object-storage-vs–ibm-cloud-and-oracle-cloud- equivalent_293464

NEW QUESTION 54
Which 2 OSS object types can be configured as parameter for object lifecycle management? (Choose two.)

Infrequent access

Snapshot

Archive

Chunk

NEW QUESTION 55
Multiple lower-configuration I/O-optimized ECS instances can be used withto deliver a high- availability architecture.

Server Load Balancer

RDS

Auto Scaling

OSS

Explanation
Server Load Balancer (SLB) is a service that distributes network traffic across multiple ECS instances to improve the service capabilities of applications. By using SLB, you can increase the availability and fault tolerance of your applications. You can also use SLB with Auto Scaling to dynamically adjust the number of ECS instances based on the traffic load. Multiple lower-configuration I/O-optimized ECS instances can be used with SLB to deliver a high-availability architecture that can handle traffic spikes and reduce costs.
References:
Alibaba Cloud Server Load Balancer
Alibaba Cloud Elastic Compute Service
ACA Cloud Computing Certification Exam Preparation Course

NEW QUESTION 56
Which three of the following statements about domain name binding to your OSS bucket are correct? (Choose three.)

Your customized domain name will be audited by Alibaba Cloud

your customized domain name need to be put on record in MIIT (Ministry of Industry and Information Technology)

the number of domain names you bind to one bucket can’t exceed 20

mapping a domain name to your bucket endpoint is mandatory

NEW QUESTION 57
Which of the following statements is true for RDS?

Multiple databases can be created in one RDS instance.

Databases with the same name are allowed in the same instance.

Resources are not shared among the databases in the same RDS instance.

None of the above is true.

NEW QUESTION 58
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.

SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling

All ECS instances under the same SLB instance must be running on the same operating system

All backend servers under the same SLB instance must be in the same Scaling Group

All backend servers under the same SLB instance must have the same configuration

Explanation/Reference: https://www.alibabacloud.com/blog/comprehensive-upgrade-of-alibaba-cloud-auto-scaling- product_594112

NEW QUESTION 59
www.company.com is a newly launched social portal for exchanging automotive information. The portal is based on PHP, including 10GB of images, and some JavaScripts files. Currently one single ECS instance is used to host all the application content as well as a MySQL database. With the growing number of users, the portal is getting slower to load images or respond to user requests. Moreover, there will be additional 50GB image content uploaded to the portal every week. Which combination of Alibaba Cloud services below can help resolve the storage and performance issue at the same time?

OSS + CDN combination

OSS + MTS combination

OSS + RDS combination

OSS + ECS combination

NEW QUESTION 60
You canan ECS instance’s configuration. (Choose two.)

upgraded

downgraded

downloaded

uploaded

NEW QUESTION 61
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?

Web application

Confidential files on the server

Pictures on server

Database

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 62
Multiple lower-configuration I/O-optimized ECS instances can be used withto deliver a high- availability architecture.

Server Load Balancer

RDS

Auto Scaling

OSS

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