An ECS virtual machine can only run one container.

• A.True
• B.False

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Regarding the description of DDS, which of the following statements is correct? (Multiple choice)

• A.Through the configuration of VPC, subnet, and security group, DDOS protection uses SSL security access and other multi-layer security protection systems to effectively resist Various malicious attacks to ensure data security
• B.The replica set contains multiple replicas. When the primary node fails, DDS can achieve a second-level master/standby switch
• C.DDS has a multi-node replica set high-availability architecture, providing extremely high business availability guarantee
• D.DDS supports read-write separation, and its write operations can only be performed on the master node in the replica set

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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)

• A.Grasp the running status of the applications deployed on PaaS, and support the tracking of faults and performance issues
• B.Monitoring the laaS layer
• C.Measure and analyze the end-to-end experience of users
• D.Only pay attention to the running status of the PaaS layer application

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UML state diagram shows the life cycle of a class.

• A.False
• B.True

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Assume that a VMware virtual machine allocates 10GB of space, uses 40GB of space during the initial backup, and subsequently adds 5GB of daily data.
When using CBR for backup, which of the following options is the amount of data for the first full backup and subsequent incremental backups?

• A.100GB ; 5GB
• B.40GB ; 5GB
• C.100GB ; 100GB
• D.40GB ; 100GB

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