You want to implement a real-time analytics dashboard for monitoring IoT device data. The solution must be fully managed and scale automatically. What would you use?
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Correct answer: Dataflow with Pub/Sub as the source.
Why this is the answer
*Explanation:* To implement a fully managed, auto-scaling real-time analytics dashboard for monitoring IoT device data, the recommended choice is **Dataflow with Pub/Sub as the source**. Dataflow can handle real-time data streams and is fully managed, making it a suitable choice for this use case. Other options like Dataproc with Spark Streaming (requires manual scaling and management), BigQuery with streaming inserts (not designed for real-time dashboards), Cloud Monitoring with custom metrics (not for real-time analytics at scale), and App Engine with real-time APIs (not designed for real-time analytics dashboards) are not as well-suited for this specific requirement.
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