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

Application layer

Answer

Network layer

Answer

Processing layer

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

Directly reading sensor values

Answer

Rendering the user interface

Answer

Powering IoT field devices

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

A type of IoT sensor

Answer

A cloud storage service

Answer

A user interface for IoT dashboards

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

Moving all computation to centralized cloud data centers

Answer

Using only battery-powered devices

Answer

Eliminating the need for cloud services

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

Request-Response

Answer

Polling

Answer

Peer-to-Peer

Question 6

What does 'device shadow' (also called device twin) provide in IoT cloud architecture?

Accepted Answer

A persistent virtual state of an IoT device in the cloud, accessible even when the device is offline

Answer

A physical backup device

Answer

A secondary cloud region for redundancy

Answer

An encrypted copy of device firmware