IOT IoT Architecture and Design 2

Question 1

What is the primary purpose of an IoT device management platform?

Accepted Answer

Provisioning, monitoring, configuring, and updating large fleets of IoT devices at scale

Answer

Generating sensor data visualizations

Answer

Providing user authentication for mobile apps

Answer

Managing cloud storage buckets

Question 2

In IoT system design, what does 'idempotency' mean for device command handling?

Accepted Answer

Executing the same command multiple times produces the same result as executing it once

Answer

Commands that never expire

Answer

Commands that self-encrypt

Answer

Commands that adapt to different device types

Question 3

Which IoT architectural pattern separates the 'thing' from its 'internet' representation, enabling offline operation?

Accepted Answer

Device shadow/digital twin pattern

Answer

Event sourcing

Answer

CQRS

Answer

Saga pattern

Question 4

What is the significance of 'backpressure' in IoT data pipeline design?

Accepted Answer

A mechanism to slow down data ingestion when downstream processing cannot keep up, preventing data loss

Answer

Physical air pressure sensors in IoT pipelines

Answer

Pressure applied to IoT device enclosures

Answer

Network congestion from too many devices transmitting simultaneously

Question 5

In IoT system design, what is the purpose of 'exponential backoff' in device reconnection logic?

Accepted Answer

Progressively increasing the wait time between reconnection attempts to avoid overwhelming the server

Answer

Increasing sensor sampling frequency after failure

Answer

Reducing data encryption strength over time

Answer

Backing up data exponentially faster after a failure

Question 6

What is 'provisioning' in the context of IoT device lifecycle management?

Accepted Answer

The process of registering, authenticating, and configuring new IoT devices before they join a network

Answer

Disposing of end-of-life IoT devices

Answer

Monitoring device battery levels

Answer

Archiving historical IoT data