When connecting to the Alibaba Cloud RDS database, in order to improve the completeness and integrity of the connection, you can enable SSL encryption and install an SSL CA certificate for the required application service. Which of the following statements are correct? (Number of correct answers: 3)

• A.If the RDS instance is a multi-node instance, the system will trigger the active/standby switch after the SSL service is disabled.
• B.Due to the way in which SSL encryption is implemented, enabling SSL encryption will significantly increase the CPU usage rate. Enable SSL encryption when there is an encryption requirement for the external network link. The intranet link is relatively safe, and generally no link encryption is required.
• C.It is discovered that an Alibaba Cloud RDS SSL certificate is about to expire, and the validity period needs to be updated, requiring that the certificate be updated, then reinstalled. This will restart the RDS instance.
• D.When using read/write splitting, you can also enable SSL encryption to improve the security of the connection.

Comment: *

Name: *

Email: *

Verification: *

When versioning is enabled for an OSS Bucket, previous versions of objects will be retained, using storage space and incurring additional costs. How can you save space and reduce costs, while retaining some of the benefits of object versioning?

• A.Avoid using version management.
• B.Use OSS's built in lifecycle management capabilities to move old versions of objects to Archival Storage.
• C.Use the Function Compute Service to regularly check for and delete old versions of objects.
  C Use OSS s built in lifecycle management capabilities to automatically delete old versions of objects after a set time.

Comment: *

Name: *

Email: *

Verification: *

A developer runs a web application on a physical machine in an IDC. The machine is running Ubuntu Linux.
Which of the following is the recommended method if he wants to migrate this web application onto an Alibaba Cloud ECS instance?

• A.Use a third-party image creation tool to create an image from the physical server. Upload the image to the ECS console to turn it into a custom image. Then, use the custom image to create ECS instances.
• B.Use a third-party image creation tool to create an image from the physical server. The image is then uploaded to Alibaba Cloud Object Storage Service (OSS) for storage. In the ECS console, import that image from OSS, then, create an ECS instance from the custom image.
• C.Use SMC(Server Migration Center) to collect data from the origin physical server. Create an intermediate ECS instance on Alibaba Cloud and wait for the data transfer to complete. Then generate a new image directly from that intermediate ECS instance.

Comment: *

Name: *

Email: *

Verification: *

For business scenarios with strong data reliability requirements or financial business scenarios with regulatory requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities?
(Number of correct answers: 3)

• A.The primary database (the one to be backed up) must have an Alibaba Cloud Intranet address
• B.RDS realizes real-time synchronization between the master instance and the remote disaster recovery instance through Data Transmission Service (DTS)
• C.When an outage occurs in the area where the primary instance is located, and neither the primary instance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recovery instance can be switched to the primary instance
• D.When the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance

Comment: *

Name: *

Email: *

Verification: *

Which of the following web applications are suitable for deployment on Simple Application Server (SAS), as compared with LCS? (Number of correct answers: 3)

• A.Quickly build serverless site using Function Compute
• B.Set up a NoSQL database service
• C.Quickly build a personal, learning, or test environment
• D.Quickly build a small e-commerce website
• E.Quickly build a personal blog website

Comment: *

Name: *

Email: *

Verification: *