IoT and Arduino Quiz

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

• They don't require internet access

• They can communicate and exchange data with other devices

• They are only used for entertainment purposes

• They are standalone systems without connectivity

Which of the following is an example of an IoT device?

• Laptop

• Smart fridge

• Printer

• Television

In IoT, what does the term "actuator" refer to?

• A device that sends data

• A device that controls a system by receiving input signals

• A sensor that collects environmental data

• A device that processes data

What is the working principle of an ultrasonic sensor?

• Light reflection

• Sound wave reflection

• Infrared radiation

• Temperature variation

How does an LDR (Light Dependent Resistor) function?

• It changes resistance based on temperature

• It changes resistance based on light intensity

• It produces current in the presence of light

• It produces heat when exposed to light

PIR sensors are mainly used in which type of applications?

• Security alarms

• Temperature monitoring

• Liquid level detection

• Distance measurement

Which type of radiation is detected by an IR sensor?

• Ultraviolet

• Visible light

• Infrared

• Gamma rays

What does a soil moisture sensor measure?

• Water vapor

• Soil temperature

• The amount of water in soil

• Air humidity

In an automatic irrigation system, the moisture sensor is used to:

• Turn on the lights

• Control water supply to the plants

• Measure the temperature of plants

• Monitor air quality

Which communication technology is commonly used in IoT for short-range connectivity?

• Bluetooth

• 4G

• Satellite

• Fiber optics