Which of the following statements is most accurate about the Data Transmission Service (DTS) database migration function?
A. Supports database schema replication between instances.
B. Supports warning when source and destination has some unresolved conflict found.
C. Supports all of the above functions.
D. Supports migrating MySQL databases from external sources.
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 must be in the same region and zone.
B. The instance and the scaling group must be in the same region but not necessarily the same zone.
C. 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.
D. The instance and the scaling group can be in different regions and zones.
OSS supports multi-part uploading for large files, namely dividing a large file into multiple parts and uploading them in order. This function is suitable for scenarios such as uploading large files or uploading files with poor connectivity.
After completing all the multi-part uploading tasks, if you forget to invoke the "Complete Multipart Upload" interface, there will be fragment files left in OSS, occupying bucket storage space-To facilitate deleting those files, OSS provides the________function.
A. OpenAPI batch deletion
B. Online batch deletion
C. Bucket clearing
D. Fragment management
Which of the following ports does RDS for MySQL listen on by default?
A. Port 8080
B. Port 3306
C. Port 3060
D. Port 3600
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. 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.
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. 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.
If an administrator often needs to manage multiple ECS instances in an Alibaba Cloud VPC through the Internet. Which of the following solutions can meet this need at low costs and without affecting system security.
A. None of these answers are correct.
B. Choose an ECS instance from VPC and make it as the bastion host And then, apply an EIP and bind it to this ECS instance. After that the administrator can manage other ECS instances through this bastion host.
C. Modify the VPC Security Group policy, to allow access from the Internet.
D. Bind an EIP to each of the ECS instances, and Jog on to each of these ECS instances to manage them.
RDS accounts can be used to connect with the databases created on a given RDS instance. Each account can be bound with multiple databases. Yet, the read/write permissions of each database can only be assigned to one RDS account
A. True
B. False
A company launched its online service just a year ago. It uses five ECS instances and does not have a full-time system administrator Over the last six months, the company's system has encountered various security problems Several high-risk vulnerabilities were exploited by hackers, leading to leakage of the company's confidential data. Which of the following Alibaba Cloud products can be used to quickly resolve this problem?
A. Managed Security Service
B. Cloud Firewall
C. Anti-DDoS Pro Service
D. Security Center
Many of Alibaba Cloud services provide highly reliable data storage capacity. For example, Object Storage Service (OSS) promises that its data reliability is no less than 99 99999999%. This high data reliability is solely achieved by RAID 0+1 redundancy technology.
A. True
B. False
You have created two Alibaba Cloud VPCs in two different regions. To establish communication between these two VPCs via the Intranet, you can________.
A. Use the VRouter to create a new route table to enable the communication
B. Use CEN to establish communication between VPCs
C. Create a new access rule through the Security Group to enable the communication
D. No operation is needed, as VPCs under the same account are connected through the Intranet by default
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