ACA-Cloud1 Dumps - Grab Out For [NEW-2024] Alibaba Cloud Exam
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NEW QUESTION # 40
Which of the following statements to OSS bucket is not correct?
- A. Every bucket should have a unique name
- B. There is no limitation to objects number inside one bucket
- C. Bucket name can be changed after creation
- D. Every user can create more than one bucket
Answer: C
Explanation:
Explanation
A bucket is a container for objects in Object Storage Service (OSS). Every user can create more than one bucket, but every bucket should have a unique name in OSS. There is no limitation to the number of objects inside one bucket. However, the bucket name cannot be changed after creation. You cannot customize, change, or request a namespace name change1. If you want to modify an object, you must upload a new object with the same name as the existing one to replace it2. References: 3: Create a bucket - Object Storage Service - Alibaba Cloud3 4: Manage objects in a versioning-enabled bucket - Object Storage Service - Alibaba Cloud4 1: Understanding Object Storage Namespaces - Oracle1 2: OSS Concepts - Alibaba Object Storage Service Course - Cloud Academy2
NEW QUESTION # 41
Server Load Balancer supports protocols like ______________. (Choose four.)
- A. MPLS
- B. MQTT
- C. UDP
- D. HTTPS
- E. TCP
- F. HTTP
Answer: C,D,E,F
Explanation:
Comprehensive protocol support - ICMP, TCP, UDP, HTTP, HTTPS,
Reference: https://www.a10networks.com/resources/articles/server-load-balancing
NEW QUESTION # 42
As a cloud computing service provider, Alibaba Cloud provides security services including. (Choose two.)
- A. Security operation for underlying hardware of cloud computing.
- B. IP white list setting for RDS.
- C. Application maintenance in ECS instances.
- D. Security isolation between cloud computing tenants.
Answer: A,D
NEW QUESTION # 43
Alibaba Cloud CDN can directly accelerate the access to the files stored in OSS and reduce OSS traffic costs.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 44
When we talk about the 'Elastic' feature for ECS product, we are not talking about.
- A. Elastic Storage
- B. Elastic Network
- C. Elastic Administration
- D. Elastic Computing
Answer: C
Explanation:
Explanation
Elastic Computing Service (ECS) is a cloud computing service that provides scalable, on-demand computing resources for cloud applications. ECS offers elastic computing, elastic storage, and elastic network features to meet different business needs. However, ECS does not provide elastic administration, which means that the management and configuration of ECS resources are not automatically adjusted according to the workload or demand. Users need to manually create, modify, or delete ECS instances, disks, snapshots, security groups, and other resources. Users can also use other Alibaba Cloud services, such as Auto Scaling, Server Load Balancer, and Cloud Monitor, to enhance the elasticity and availability of ECS.
References:
[Alibaba Cloud Elastic Compute Service]
ACA Cloud Computing Certification Exam Preparation Course
Alibaba Cloud ACA-Cloud1 ACA Cloud Computing Certification Exam
NEW QUESTION # 45
Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)
- A. snapshot duplicate
- B. snapshot deletion
- C. snapshot rollback
- D. snapshot download
Answer: A,D
NEW QUESTION # 46
You are developing a highly available web application using stateless web servers. Which services are suitable for storing session state data? (Choose two.)
- A. MaxCompute
- B. RDS
- C. OSS
- D. Table Store
Answer: B,D
Explanation:
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 # 47
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 distributed file management system with 3 redundant copies
- D. a double copy distributed system
Answer: C
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 # 48
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 # 49
You can create a custom image for ECS using which of the followings? (Choose two.)
- A. Memory snapshot
- B. System disk snapshot
- C. Data disk snapshot
- D. CPU snapshot
Answer: B,C
NEW QUESTION # 50
A/An _________________ is a copy of data on a disk at a certain point in time.
- A. EIP
- B. template
- C. image
- D. snapshot
Answer: D
NEW QUESTION # 51
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?
- A. The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti- leech URL, and Master-Sub Account
- B. Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
- C. 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.
- D. Data has to be backed up by customer manually, which is time-consuming and labor-intensive.
Answer: B
NEW QUESTION # 52
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: B
Explanation:
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 # 53
A/An is a copy of data on a disk at a certain point in time.
- A. EIP
- B. template
- C. image
- D. snapshot
Answer: D
NEW QUESTION # 54
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: B
NEW QUESTION # 55
A company wants to migrate its system to public cloud platform and they choose Alibaba Cloud. The migration process is very important and they want to ensure that everything works right. Which of the following services can the company choose?
- A. Aftersales Support
- B. Event Management Service
- C. Alibaba Cloud Product Operation Training
- D. Alibaba Cloud Architecture Design Training
Answer: D
Explanation:
Explanation
Alibaba Cloud Architecture Design Training is a service that provides professional guidance and best practices for designing cloud architectures that meet the business requirements and goals of the company. Alibaba Cloud Architecture Design Training can help the company to understand the cloud migration process, select the appropriate Alibaba Cloud products and services, design a secure, reliable, scalable, and cost-effective cloud architecture, and implement the migration plan with minimal risks and disruptions. Alibaba Cloud Architecture Design Training can also help the company to optimize the performance and efficiency of the cloud system after the migration.
References:
Alibaba Cloud Architecture Design Training
Cloud Migration - Alibaba Cloud Solutions
ACA-Cloud1 Alibaba Exam Questions and Answers - CertLibrary
NEW QUESTION # 56
Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. To control the access to the files stored on OSS, OSS provides multiple access permissions for each bucket. These bucket permissions are. (Choose three.)
- A. Private-read
- B. Public-read-write
- C. Private
- D. Public-read
Answer: B,C,D
Explanation:
Explanation
According to the Alibaba Cloud Academy, Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. To control the access to the files stored on OSS, OSS provides multiple access permissions for each bucket. These bucket permissions are:
Public-read-write: Anyone, including anonymous users, can perform read and write operations on the objects in the bucket. The owner of the bucket is charged for the requests and traffic generated by these operations. This permission poses a high security risk and is not recommended.
Public-read: Only the owner of the bucket and authorized RAM users can perform write operations on the objects in the bucket. Anyone, including anonymous users, can perform read operations on the objects in the bucket. The owner of the bucket is charged for the requests and traffic generated by these operations.
Private: Only the owner of the bucket and authorized RAM users can perform read and write operations on the objects in the bucket. Other users, including anonymous users, are denied access to the objects in the bucket unless they have been granted temporary access permissions by the bucket owner or authorized RAM users.
Therefore, the options B, C, and D are the correct answers that describe the bucket permissions in OSS. References: OSS Security - Alibaba Object Storage Service Course - Cloud Academy, OSS Concepts - Alibaba Cloud Documentation Center
NEW QUESTION # 57
ECS is a highly flexible service. It can be used independently as a simple web server, or used with other Alibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as:. (Choose four.)
- A. large-traffic apps
- B. Databases
- C. no limited online storage
- D. simple web applications
- E. Official corporate websites
Answer: A,B,D,E
NEW QUESTION # 58
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