D. LI is called data mining machine age lake, which is the interface through which the components are compatible, so as to provide a unified multi-state data on the cloud-analytical skills?

• A. HDFS
• B. Flink
• C. MapReduce
• D. Spark

In order to prevent tenants from suffering losses due to virtual machine escape attacks, which type of cloud service does Huawei recommend that tenants purchase?

• A. Cloud Fortress
• B. Dedicated Host
• C. Enterprise host security
• D. Container Security Service

Which of the following are typical application scenarios of the ServiceStage microservice solution? (Multiple choice)

• A. Continuous integration and continuous delivery
• B. Gray release
• C. Rapid development and deployment of web applications
• D. Microservice development and management

PFX is a personal certificate saved in binary format. Generally appear in windows Server.
When a user wants to upload a certificate in this format to a Huawei ELB instance, which of the following operations is correct?

• A. ELB does not support certificates in PFX format. You can only convert them to DER format first. Upload again
• B. ELB does not support certificates in PFX format. It can only be said to be converted into PEM format first. Upload again
• C. Elastic load balancing ELB supports certificates in PFx format. It can be uploaded directly.
• D. The ELB load balance does not support certificates in PFx format. You can only convert them to P7B format first. Upload

Because stand-alone RDS has certain limitations in processing large quantities of data, a company decided to use Huawei Cloud DDM distributed middleware + RDS instance to solve the problems of limited stand-alone RDS expansion capabilities and slow database response. Which of the following description about the advantages of DDM distributed middleware + RDS instance over stand-alone RDS are correct? (Multiple choice)

• A. High performance, DDM instance associates multiple RDS nodes, and realizes parallel computing at the same time.
• B. separate read and write, the user can read the data in accordance with the pressure load for each RDS instance configuration - one or more read-only instance, improve query concurrency.
• C. Horizontal expansion, DDM supports new RDS instances without interrupting business, and horizontal expansion of storage space.
• D. Data distributed storage, DDM adopts a horizontal split method to split a single database with a large number of data records according to specified rules, and distributed storage to each partition.