IOT IoT Architecture and Design

Question 1

Which IoT architecture layer is responsible for collecting raw data from the physical environment?

Accepted Answer

Perception/Sensing layer

Answer

The perception or sensing layer is the bottom layer of IoT architecture, comprising physical sensors and actuators that interact with the environment.

Question 2

In a three-tier IoT architecture, what function does the 'middleware' or 'platform' tier serve?

Accepted Answer

Data aggregation, storage, processing, and providing APIs to the application tier

Answer

The middleware tier in IoT architecture aggregates sensor data, provides processing, storage, and exposes APIs that application services consume.

Question 3

What is a 'gateway' in an IoT architecture?

Accepted Answer

A device that bridges communication between field IoT devices and cloud/backend systems

Answer

An IoT gateway connects field devices using local protocols (Zigbee, Bluetooth) to cloud platforms, handling protocol translation and local processing.

Question 4

What is the key design principle of a 'fog computing' architecture in IoT?

Accepted Answer

Distributing computation, storage, and networking services between the cloud and IoT edge devices

Answer

Fog computing extends cloud services closer to IoT devices in a distributed hierarchy, reducing latency and bandwidth by processing data between the edge and cloud.

Question 5

Which design pattern involves IoT devices publishing data to a central message broker that distributes it to interested subscribers?

Accepted Answer

Publish-Subscribe (Pub/Sub)

Answer

The Publish-Subscribe pattern decouples IoT data producers from consumers through a broker, allowing many subscribers to receive data from many publishers.

IOT - Internet of Things Practice Test

IOT - Internet of Things Practice Test

IOT IoT Architecture and Design