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The ACA-Cloud1 Exam is a multiple-choice exam that consists of 50 questions, and has a time limit of 90 minutes. ACA-Cloud1 exam is conducted in English and is available in both online and offline modes. ACA-Cloud1 exam is conducted by Alibaba Cloud and is recognized globally as a standard for cloud computing certification.
NEW QUESTION # 38
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. Import data into OSS to share the storage load of the platform.
- 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. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
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 # 39
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. FALSE
- B. TRUE
Answer: B
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 # 40
A/Anis a copy of data on a disk at a certain point in time.
- A. image
- B. snapshot
- C. EIP
- D. template
Answer: B
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 # 41
You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)
- A. SLB
- B. RDS
- C. ECS
- D. OSS
- E. MaxCompute
Answer: B,C,D
NEW QUESTION # 42
In mainland China, the approval requirements for business record filing vary depending on provincial communication management bureaus.
- A. FALSE
- B. TRUE
Answer: B
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 # 43
Your friend purchases some Alibaba Cloud resources and uses them to build an online training website. Before the site goes online, your friend wants to perform some performance tests but doesn't know how to do it. In this case, which of the following services can help?
- A. Support Ticket Service
- B. After-Sales Support Service
- C. None Of The Above
- D. Load and Performance Testing Service
Answer: B
Explanation:
Reference:
https://www.alibabacloud.com/support/after-sales
NEW QUESTION # 44
Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean ______________?
- A. Server Load Balancer cannot be deployed for ECS instances in various regions.
- 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. ECS instances in different regions cannot communicate with each other on the intranet.
Answer: C
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/40654.htm
NEW QUESTION # 45
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. It supports adding existing ECS instances into the scaling group, whose status however must be _________.
- A. Preparing
- B. Running
- C. Stopped
- D. Created
Answer: B
Explanation:
Explanation/Reference: http://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/DNESS1876951_en- US_intl_181115175025_public_176152014821b385708e5290da11a0fe.pdf (14)
NEW QUESTION # 46
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. Confidential files on the server
- B. Pictures on server
- C. Database
- D. Web application
Answer: C
NEW QUESTION # 47
Which of the following statements to OSS bucket is not correct?
- A. Bucket name can be changed after creation
- B. Every user can create more than one bucket
- C. There is no limitation to objects number inside one bucket
- D. Every bucket should have a unique name
Answer: A
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/31885.htm?spm=a2c63.p38356.a3.3.43f03bb9a3KjLl
NEW QUESTION # 48
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. Server Load Balancer
- C. RDS
- D. OSS
Answer: A
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/25371.htm
NEW QUESTION # 49
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:
Explanation
Explanation/Reference: https://www.alibabacloud.com/product/anti-ddos
NEW QUESTION # 50
Alibaba Cloud provides powerful security services (the same level of security services used to support Alibaba Group double 11 shopping festival). However, you have to pay first before using any of the security services.
- A. True
- B. False
Answer: B
NEW QUESTION # 51
When we talk about the 'Elastic' feature for ECS product, we are not talking about _____________.
- A. Elastic Administration
- B. Elastic Computing
- C. Elastic Storage
- D. Elastic Network
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION # 52
You are developing a highly available web application using stateless web servers. Which services are suitable for storing session state data? (Choose two.)
- A. RDS
- B. OSS
- C. Table Store
- D. MaxCompute
Answer: A,B
NEW QUESTION # 53
When using Alibaba Cloud OSS, you can set access control in 3 different levels, which are (Choose three.)
- A. RAM account level
- B. Object level
- C. Directory level
- D. Bucket level
Answer: A,B,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 # 54
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Alibaba Cloud ACA-Cloud1 (ACA Cloud Computing Associate) Certification Exam is a professional-level certification designed for individuals who want to demonstrate their expertise in cloud computing. ACA Cloud Computing Associate certification exam covers a broad range of cloud computing concepts and technologies, including cloud infrastructure, storage, networking, security, and management. It is an excellent opportunity for IT professionals who are looking to advance their careers in cloud computing and work with Alibaba Cloud, one of the leading providers of cloud computing services.
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