Question: Select the correct statement. A heartbeat message is sent by every active DataNode. A heartbeat message is sent by each active Secondary NameNode. A group

Select the correct statement.
A heartbeat message is sent by every active DataNode.
A heartbeat message is sent by each active Secondary NameNode.
A group of DataNodes sends a single heartbeat message.
A heartbeat message is sent by every active NameNode.
Select the correct statement. A heartbeat message

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