SENTRIX - IoT and Arduino Quiz

Which of the following is a key feature of IoT devices?

• Manual Operation

• Real-time data collection and sharing

• Local storage only

• Independent operation without networks

Answer explanation

Features of IoT Devices:

• Connectivity

• Sensors and Actuators

• Data Collection and Processing

• Real-Time Monitoring

• Interoperability

• Low Power Consumption

• Smart Decision-Making (AI/ML Integration)

• Device Management and Updates

Which communication protocol is NOT commonly used in IoT devices?

• Bluetooth

• Wi-Fi

• Zigbee

• HTTP

Answer explanation

HTTP (Hyper-Text Transfer Protocol) is a protocol used for transferring hypertext requests and information on the web, allowing communication between a client (like a browser) and a server.

Bluetooth, Wi-Fi, and Zigbee are widely used in IoT for communication, with Bluetooth offering short-range connectivity, Wi-Fi providing higher data rates and longer range, and Zigbee being ideal for low-power, low-data-rate applications in smart homes and industrial settings.

What is the primary function of a microcontroller in an IoT system?

• Data storage

• Power generation

• Processing signals and controlling devices

• Monitoring temperatures

Answer explanation

A microcontroller is a crucial component of an IoT system, responsible for processing signals, executing control algorithms, and managing the interaction between sensors, actuators, and other devices to enable smart functionalities.

In IoT, the term “Edge Computing” refers to:

• Performing computation at the data center

• Processing data at or near the source of data generation

• Storing data on the cloud

• Enhancing internet speeds for IoT devices

Which sensor is commonly used to detect motion in IoT systems?

• PIR Sensor

• Temperature Sensor

• LDR Sensor

• Humidity Sensor

How many analog input pins does the Arduino Uno have?

• 14

• 8

• 10

• 6

Which microcontroller is commonly used in Arduino UNO?

• ATmega328P

• ARM Cortex-M0

• PIC16F877A

• STM32

Answer explanation

The Arduino UNO uses the ATmega328P microcontroller because it offers a balance of processing power, memory, and ease of use, making it ideal for a wide range of DIY electronics projects while being cost-effective and compatible with the Arduino ecosystem.

Which of these is an IoT-based application?

• Smart thermostat

• Voice-controlled assistant

• Smart fridge

• All of the above

Which data type is commonly used to send simple, low-power messages between IoT devices?

• Text files

• XML

• CSV

• JSON

Answer explanation

JSON (JavaScript Object Notation) is often used for communication between IoT devices, as it is lightweight, human-readable, and easily parsed by both humans and machines

What is the purpose of an actuator in an IoT device?

• To sense environmental changes

• To control or move a system component

• To process data

• All of the above