Alibaba Cloud ACP-Cloud1 問題集

質問 1：
Alibaba Cloud Content Delivery Network (CDN) performs content acceleration with the support of intelligent DNS resolution The following function_________is NOT included in intelligent DNS resolution.
A. The intelligent DNS resolution can parse the same domain name into different IP addresses based on the IP of different visitors.
B. The intelligent DNS resolution supports web page content caching. A user will receive data from the origin site at first-time access, and then will be reading data from cache in subsequent requests
C. If a user activates mirror sites in different IDCs, intelligent DNS resolution can achieve load balancing by guiding customers in different places to different mirror sites.
D. A user request is directed to the server nearest to the customer based on location information of the pre-configured IP section.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 2：
Which of the following statements is most accurate about the Data Transmission Service (DTS) database migration function?
A. Supports all of the above functions.
B. Supports database schema replication between instances.
C. Supports warning when source and destination has some unresolved conflict found.
D. Supports migrating MySQL databases from external sources.
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 3：
Auto Scaling can automatically adjust the number of ECS instances based on user-defined scaling rules to meet service needs. If a user cannot predict service changes or does not have enough history data, he/she can still use dynamic scaling mode to automatically add/remove ECS instances based on certain Cloud Monitor performance metrics (such as the CPU utilization rate)
A. False
B. True
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 4：
When the "'Obtain the Visitor's Real IP Address" function is enabled in Alibaba Cloud SLB For layer 7 services, you can obtain the real IP addresses of visitors through the______________field in HTTP header
A. X-Forwarded-For
B. Etag
C. Authorization
D. Connection
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 5：
Different Alibaba Cloud VPCs are completely isolated from each other.
By default, the VPCs cannot communicate with each other over Intranet, but you can establish VPN connections via the Internet to achieve interconnection between VPCs.
A. False
B. True
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 6：
You are designing a solution for a startup company, the proposed solution is like this You suggest they use ECS instances to process requests from mobile App clients, and use SLB to distribute data traffic and ensure the load across each backend ECS instance is balanced.
Moreover to deal with volatile fluctuations in business volume (page views are much higher on the weekends), you also suggest they use Auto Scaling to dynamically increase or reduce computing resources.
The company is satisfied with the solution you proposed. However, they have one concern that when removing an idle instance from the scaling group: if Auto Scaling shuts the instance down directly, the service running on that instance will be abruptly terminated, resulting in poor user experience.
In order to eliminate your customer's concern, which of the following solutions should you recommend them?
A. Find the ECS instance that is going to be removed from the backend server pool of the SLB instancer and automatically set the weight of this ECS instance to 0. This instance will not be assigned with new requests, and will be automatically removed from the backend server pool after existing tasks are completed.
B. Use the Lifecycle Hook function embedded m Auto Scaling Define a suitable timeout and a web hook to do the necessary work before the instance is removed.
C. Find the ECS instance that is going to be removed from the backend server pool of the SLB instance, and manually remove this instance from the backend server pool Applications running on this ECS instance will normally return results, but this instance will not be assigned with new requests.
D. First, insert a script into the image for creating the ECS instance Second, make the script run automatically when the operating system in this ECS instances is about to shut down. This script contains the processing logic that can ensure the instance finish all the remaining tasks before shutting down.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 7：
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies It supports adding an existing ECS instance into the scaling group but imposes certain requirements on instance region In this case, which of the following statements is true?
A. The instance and the scaling group can be in different regions and zones.
B. Each scaling group can span up to two regions. After adding the ECS instance, the number of regions of all the ECS instances in the scaling group must be no greater than two.
C. The instance and the scaling group must be in the same region but not necessarily the same zone.
D. The instance and the scaling group must be in the same region and zone.
正解：C
解説: (Topexam メンバーにのみ表示されます)