Medium1 markMultiple Choice
This question is part of a case study — click to read the full scenario(Case 16)

CASE STUDY: AutoIoT

Overview: Connected car manufacturer. 1M vehicles sending telemetry every 5 seconds.
Business: Predictive maintenance alerts, real-time fleet tracking, monetize anonymized data.
Executives:

  • CEO: "Leverage AI to predict failures."
  • CTO: "Current MQTT brokers crashing. Need fully managed, scalable ingestion."
  • DPO: "Vehicle location is sensitive. Strip PII before analytics."
    Tech: Ingest millions of msgs/sec, real-time stream processing for anomalies, store raw data for ML, sub-second queries for dashboards.
    Constraints: Vehicles lose connection and send late batch data. ML models updated weekly. Strict analytics budget.

Which architecture should you design for the data ingestion and processing layer to replace the crashing MQTT brokers?

GCP PCA · Question 18 · Domain 1: Designing and Planning a Cloud Solution Architecture

CASE STUDY: AutoIoT

Overview: Connected car manufacturer. 1M vehicles sending telemetry every 5 seconds.
Business: Predictive maintenance alerts, real-time fleet tracking, monetize anonymized data.
Executives:

  • CEO: "Leverage AI to predict failures."
  • CTO: "Current MQTT brokers crashing. Need fully managed, scalable ingestion."
  • DPO: "Vehicle location is sensitive. Strip PII before analytics."
    Tech: Ingest millions of msgs/sec, real-time stream processing for anomalies, store raw data for ML, sub-second queries for dashboards.
    Constraints: Vehicles lose connection and send late batch data. ML models updated weekly. Strict analytics budget.

Which database should you use to serve the real-time fleet tracking dashboard requiring sub-second queries on massive time-series data?

Answer options:

A.

Cloud SQL

B.

Cloud Bigtable

C.

Cloud Spanner

D.

Cloud Storage

How to approach this question

Identify the GCP database designed specifically for high-throughput, low-latency time-series data.

Full Answer

B.Cloud Bigtable✓ Correct
Cloud Bigtable
Cloud Bigtable is Google Cloud's fully managed, scalable NoSQL database for large analytical and operational workloads. It is specifically designed for high-throughput ingestion and low-latency reads of time-series data (like IoT telemetry), making it the ideal backend for a real-time fleet tracking dashboard.

Common mistakes

Choosing Cloud SQL (A). Relational databases will quickly bottleneck on write operations at IoT scale.

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