A company is collecting data from several thousand machines globally. Which software component in the overall architecture is the next destination of the dataflow after the data has been gathered and normalized on the edge data software?
A. relational database: MySQL
B. historian database: influxDB
C. message broker: Apache Kafka
D. dashboard: Node.js web app
Answer: B
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Which data visualization technique should be used to represent an important single metric on a dashboard?
A. heatmap
B. scatter pot
C. gauge
D. treemap
Answer: C
