How many nodes (design specifications) can DWS be expanded to?

The goal of HUAWEI CLOUD's three-dimensional operation and maintenance is to control the operating status of the system in an all-round way and quickly respond to various problems. Which of the following are specifically reflected? (Multiple choice)

Which of the following Huawei cloud middleware services can solve the asynchronous message caching problem of business applications?

The Internet of Vehicles scene needs to implement multiple types of data analysis and write them into a horizontally-expanded relational database, such as vehicle condition analysis, fuel consumption and other analysis data. Which of the following database services is recommend renting?

Which of the following is a function of Huawei Cloud Blockchain Service? (Multiple choice)