Module 3: From Data to Decision | OceanRemote Education

1 How long does the complete IoT data journey take (from sensor to phone)?

A) 3-5 seconds B) Less than 1 second C) 10-15 seconds D) 1-2 minutes

2 What is the correct order of the IoT data journey?

A) Sensor → Cloud → Phone → ESP32 → Internet B) ESP32 → Sensor → WiFi → Cloud → Phone C) Sensor → ESP32 → WiFi → Internet → Cloud → Phone D) Phone → Cloud → WiFi → ESP32 → Sensor

3 How many bytes is a typical soil moisture reading?

A) ~60 bytes B) ~500 bytes C) ~2,000 bytes D) ~10,000 bytes

4 What happens if the ESP32 loses internet connection?

A) Data is lost forever B) ESP32 stops working completely C) ESP32 stores data offline and sends when connection returns D) You need to manually reset the device

5 Why does IoT data travel so fast despite covering thousands of kilometers?

A) Data travels through special cables only for IoT B) Light travels at 300,000 km per second C) The data is sent multiple times simultaneously D) Data only travels within the same country

6 What does the microcontroller (ESP32) do during Step 2 of the data journey?

A) Only stores data without processing B) Converts raw sensor values to meaningful data and adds metadata C) Sends data directly to phone without cloud D) Displays data on screen

7 Which networks can IoT devices work on in rural Africa?

A) Only 4G and 5G B) Only WiFi C) 2G, 3G, and 4G networks (all work) D) Only satellite internet