About ELB configuration description, Which ones are incorrect?

• A.You can choose ip when adding an elastic load balancer
• B.Configurable health check timeout time
• C.The listening strategy can be configured when creating the listener
• D.Optional session retention when configuring listener

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The description of VPN gateway parameters is the following error?

• A.Region refers to the physical location of the virtual private cloud
• B.Bandwidth refers to the maximum bandwidth that each VPN connection can reach
• C.Reliability currently only supports single live
• D.Support two billing methods, charge by bandwidth or charge by traffic

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Which of the following database examples supports GIS geographic information processing and is suitable for location application systems?

• A.PostgresQL
• B.MongoDB
• C.MySQL
• D.SQLServer

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When creating a whole machine image, Which mirror sources can be selected?

• A.Cloud server backup
• B.Cloud Server
• C.Mirror file
• D.Bare metal server

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Which of the following components does not belong to the big data platform?

• A.Map Reduce
• B.Yarn
• C.HDFS
• D.Open Stack

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