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NEW QUESTION # 13
Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean ______________?
- A. ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
- B. Server Load Balancer cannot be deployed for ECS instances in various regions.
- C. ECS instances in different regions cannot communicate with each other on the intranet.
- D. Server Load Balancer can be deployed for ECS instances in various regions.
Answer: A
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/40654.htm
NEW QUESTION # 14
A video streaming company uses SLB to distribute user requests to 30 ECS instances (the 30 ECS instances have the same configuration). Yet, the company finds that the service traffic soars dramatically every night from 20:00 to 02:00. According to their calculation, the evening traffic is 100% higher than the traffic in other periods of time. To properly respond to user requests, which of the following methods is most preferred from the perspective of cost and implementation simplicity?
- A. Create 30 ECS instances based on the custom image and add them to SLB. Then, configure weights for these ECS instances to respond to user requests every night from 20:00 to 02:00, and reset those weights to zero for other periods of time.
- B. Configure Auto Scaling appropriately to automatically add or reduce ECS instances.
- C. Configure Auto Scaling appropriately to automatically upgrade/downgrade the ECS instances.
- D. Manually create 30 ECS instances using the custom image, and then add them to SLB every night before 20:00 and remove them after 02:00.
Answer: B
Explanation:
Reference:
https://www.alibabacloud.com/product/auto-scaling
NEW QUESTION # 15
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. Data has to be backed up by customer manually, which is time-consuming and labor-intensive.
- B. The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti- leech URL, and Master-Sub Account
- 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 Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
Answer: D
Explanation:
Explanation/Reference: https://www.alibabacloud.com/blog/alibaba-cloud-object-storage-vs--ibm-cloud-and-oracle-cloud- equivalent_293464
NEW QUESTION # 16
If you are running an online ticket booking service with relatively fixed traffic, then which kind of charging mode is more suitable for you?
- A. Pay-As-You-Go
- B. bitcoin-pay
- C. Prepaid
- D. Paypal-pay
Answer: A
NEW QUESTION # 17
Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)
- A. snapshot download
- B. snapshot duplicate
- C. snapshot deletion
- D. snapshot rollback
Answer: A,B
Explanation:
Explanation
According to the Alibaba Cloud Academy, a cloud disk snapshot is a point-in-time backup of a cloud disk.
You can use snapshots to back up data, create images, or restore data. The operations that you can do on a cloud disk snapshot are snapshot creation, snapshot deletion, snapshot rollback, and snapshot sharing.
Snapshot duplicate and snapshot download are not the operations that you can do on a cloud disk snapshot.
Therefore, the options A and C are the correct answers. References: Snapshot Overview - Alibaba Cloud Documentation Center, ACA Cloud Computing Exam Preparation Course - Alibaba Cloud, Module 3: Cloud Computing Storage, Lesson 2: Snapshot, Slide 2
NEW QUESTION # 18
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. Public-read
- D. Private
Answer: B,C,D
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/100676.htm
NEW QUESTION # 19
Server Load Balancer can help protect from attack.
- A. Ransomware
- B. Virus
- C. SQL injection
- D. DDoS
Answer: D
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/27539.htm
NEW QUESTION # 20
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. Situation Awareness
- B. Anti-DDoS Service Pro
- C. Anti-DDoS Service Basic
- D. Managed Security Service
Answer: C
NEW QUESTION # 21
Which three of the following statements about domain name binding to your OSS bucket are correct? (Choose three.)
- A. Your customized domain name will be audited by Alibaba Cloud
- B. the number of domain names you bind to one bucket can't exceed 20
- C. mapping a domain name to your bucket endpoint is mandatory
- D. your customized domain name need to be put on record in MIIT (Ministry of Industry and Information Technology)
Answer: A,B,D
Explanation:
Explanation
Domain name binding is a feature that allows you to use your own domain name to access your OSS bucket, instead of using the default OSS domain name. Domain name binding has the following requirements and limitations12:
Your customized domain name will be audited by Alibaba Cloud. You need to submit a domain name binding request and wait for approval before you can use your own domain name to access your OSS bucket.
Your customized domain name need to be put on record in MIIT (Ministry of Industry and Information Technology). This is a mandatory requirement for all websites that are hosted in mainland China. You need to provide your domain name information and relevant documents to MIIT and obtain an ICP filing number before you can use your own domain name to access your OSS bucket.
NEW QUESTION # 22
What is the full name of ECS?
- A. Elastic Compute Service
- B. Elastic Computing Server
- C. Elastic Cost Server
- D. Elastic Communication Server
Answer: A
NEW QUESTION # 23
An enterprise hosts their servers (include both Linux and Windows servers) in a traditional IDC. Every night hackers with IP addresses from many countries try to crack the password of their servers, making the administrator terribly worried about this. However, because of work requirements, the remote management port of these servers must be opened to public network.
The administrator heard that Alibaba Cloud has solutions that can help customers improve the security of their systems. Therefore, he/she wants to migrate the system to Alibaba Cloud. Which of the following functions should the administrator activate in Alibaba Cloud to reduce the possibility of brute force password cracking?
- A. Situation Awareness
- B. CloudMonitor
- C. Server Guard
- D. Anti-DDoS Basic Service
Answer: C
Explanation:
Explanation/Reference: https://www.alibabacloud.com/blog/blogblogalibaba-cloud-server-guard-a-comprehensive- assessment_284390
NEW QUESTION # 24
A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. He/she sets the "Minimum number of instances" to 6 and "Maximum number of instances" to 8.
After correctly configuring scaling settings, the customer adds a scaling rule "Remove 5 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 8 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instances are left in the scaling group when the scheduled task is activated once?
- A. Six
- B. Five
- C. Zero
- D. One
Answer: C
Explanation:
Explanation
NEW QUESTION # 25
When we talk about the 'Elastic' feature for ECS product, we are not talking about.
- A. Elastic Network
- B. Elastic Administration
- C. Elastic Computing
- D. Elastic Storage
Answer: B
NEW QUESTION # 26
Which of the following statements about file uploading to OSS strategy is not correct?
- A. If you are using OSS to store some log files which are continuously being updated, you better choose streaming method to be able to append to one existing object instead of overwriting.
- B. If you need to upload very large file you better use multi-part uploading to get the capability of resuming from break point.
- C. If you are uploading some small files (<1m), you can choose using put method to be able finish uploading in one http request.
- D. All file uploading method provided by Alibaba Cloud OSS service will support resuming from break point.
Answer: D
Explanation:
Explanation
Alibaba Cloud OSS service provides different methods for file uploading, such as simple upload, multipart upload, append upload, and resumable upload1. However, not all of these methods support resuming from break point, which is a feature that allows you to resume an interrupted upload from where it left off. The only method that supports resuming from break point is resumable upload, which is based on multipart upload and uses a checkpoint file to record the upload progress2. The other methods do not support resuming from break point, and will either overwrite or append to the existing object if the upload is interrupted and retried.
References: 1: Alibaba Cloud Academy, "OSS Upload Methods",
https://edu.alibabacloud.com/elearning/lesson/ACA-Cloud-Computing-Certification/lesson-2-oss-upload-method Alibaba Cloud, "Resumable upload", https://www.alibabacloud.com/help/doc-detail/31991.htm
NEW QUESTION # 27
Cloud disks are reliable because they use __________ to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
- A. a file system
- B. a double copy distributed system
- C. a Linux file 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 # 28
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
Explanation:
Explanation
Alibaba Cloud CDN can directly accelerate the access to the files stored in OSS and reduce OSS traffic costs.
Alibaba Cloud CDN is a global network of points of presence (POPs) that are distributed across the globe.
Alibaba Cloud CDN serves to reduce back-to-origin traffic. This in turn prevents network congestion and reduces latency. If you use Alibaba Cloud CDN to accelerate access to OSS, you can benefit from the following advantages1:
Improved user experience: Alibaba Cloud CDN caches the files stored in OSS to the POPs that are nearest to the users. This reduces the distance that the files need to travel and improves the access speed and user experience.
Reduced OSS traffic costs: Alibaba Cloud CDN reduces the number of requests that are sent to OSS.
This reduces the OSS traffic costs and the load on the OSS servers.
Enhanced security: Alibaba Cloud CDN supports HTTPS secure acceleration and anti-leech protection.
This ensures the security and integrity of the files stored in OSS. References: Use Alibaba Cloud CDN to accelerate access to OSS
NEW QUESTION # 29
A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located installed 35 HD cameras to monitor the major exits. The surveillance system is deployed on an ECS instance, which has four 2 TB data disks to store video data.
However, video data grows rapidly and the engineers find that the ECS will run out of storage space within 2 weeks.
In this case,product is thought to be the best solution for addressing the storage challenge while ensuring quick access to historical video data when needed.
- A. ECS
- B. OSS
- C. Container Service
- D. CDN
Answer: B
NEW QUESTION # 30
Which of the following statements is true for RDS?
- A. Databases with the same name are allowed in the same instance.
- B. Multiple databases can be created in one RDS instance.
- C. Resources are not shared among the databases in the same RDS instance.
- D. None of the above is true.
Answer: B
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/26092.htm
NEW QUESTION # 31
A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. He/she sets the "Minimum number of instances" to 6 and "Maximum number of instances" to 8.
After correctly configuring scaling settings, the customer adds a scaling rule "Remove 5 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 8 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instances are left in the scaling group when the scheduled task is activated once?
- A. Six
- B. Five
- C. Zero
- D. One
Answer: A
Explanation:
Explanation
Alibaba Cloud Auto Scaling service allows you to automatically adjust the number of ECS instances in a scaling group based on your business needs and scaling policies. You can set the minimum and maximum number of instances in a scaling group to limit the range of scaling actions1. When you create a scaling rule, you can specify the number of instances to be added or removed, or the expected number of instances after the scaling action2. You can also create a scheduled task to execute a scaling rule at a specified time or periodically3.
In this question, the customer sets the minimum number of instances to 6 and the maximum number of instances to 8 in the scaling group. This means that the scaling group will always have at least 6 instances and at most 8 instances. The customer also adds a scaling rule to remove 5 instances, and creates a scheduled task based on this rule. However, this scaling rule will not be executed if it violates the minimum and maximum limits of the scaling group. Therefore, when the scheduled task is activated once, the scaling group will only remove 2 instances, which is the difference between the current number of instances (8) and the minimum number of instances (6). The remaining number of instances in the scaling group will be 6, which is the correct answer. References: 1: Create a scaling group - Auto Scaling - Alibaba Cloud Documentation Center2: Create a scaling rule - Auto Scaling - Alibaba Cloud Documentation Center3: Create a scheduled task - Auto Scaling
- Alibaba Cloud Documentation Center.
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 supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.
- B. OSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.
- C. OSS leverages RAID0+1 configuration of its underlying physical hard disks. There is no impact even if
2 hard disks were to fail simultaneously. - D. Customer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.
Answer: D
NEW QUESTION # 33
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