Get Alibaba ACA-Cloud1 Exam Practice Questions - Real and Updated

Answer : D

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.Reference:1: ACA Cloud Computing Exam Preparation Course - Alibaba Cloud32: Server Load Balancer - Alibaba Cloud Documentation Center4

Answer : A

RDS for MySQL is aPlatform as a Service (PaaS)product that provides a complete database solution on Alibaba Cloud. It is fully compatible with MySQL and supports various MySQL features, such as transactions, views, triggers, stored procedures, and functions. RDS for MySQL frees users from the tasks of managing the underlying operating system, runtime environment, and software packages. Users only need to focus on their business logic and data. Alibaba Cloud takes care of the database installation, configuration, backup, recovery, monitoring, scaling, and security.Reference:MySQL Database Concepts and Operations - Alibaba Cloud Academy,Alibaba RDS Course | Cloud Academy,ACA Cloud Computing Certification - Alibaba Cloud Academy

Answer : C

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.Reference: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.

Answer : B

ECS instance filesystem directory operation is not a supported method to create a bucket in OSS. A bucket is a container for objects in OSS, and it is not related to the filesystem of an ECS instance.To create a bucket in OSS, you can use one of the following methods1:

through OSS API/SDK: You can use the OSS API or SDK to call the PutBucket operation to create a bucket.The OSS API and SDK support various programming languages, such as Java, Python, PHP, C#, and Node.js2.

through oss cmd tool: You can use the oss cmd tool, which is a command-line tool based on the OSS SDK for Python, to create a bucket by using the ossutil mb command3.

through cloud console: You can use the Alibaba Cloud console to create a bucket by following the steps in the documentation4.Reference:1:Create buckets - Object Storage Service - Alibaba Cloud Documentation Center2:PutBucket - API Reference| Alibaba Cloud Documentation Center3:Create a bucket - OSSUTIL User Guide| Alibaba Cloud Documentation Center4:Create a bucket - Object Storage Service - Alibaba Cloud Documentation Center.

Answer : B

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.Reference:1:SQL Injection - OWASP2:SQL Injection - Web Application Firewall - Alibaba Cloud Documentation Center3:Web Application Firewall:What is WAF? - Alibaba Cloud.