IoT in Week 4

What is a sensor?

• A device that stores electrical energy.

• A component that processes digital signals.

• A device that detects and responds to physical inputs from the environment.

• A type of microcontroller used in embedded systems.

Which of the following is NOT a type of sensor?

• Temperature sensor

• Pressure sensor

• Resistor

• Motion sensor

Which of the following are passive sensors?

• Thermocouples and photodiodes

• Radar and LiDAR

• Accelerometers and gyroscopes

• Ultrasonic and infrared sensors

Which of the following are active sensors?

• Thermistors and strain gauges

• Piezoelectric sensors and active infrared sensors

• Capacitive and resistive sensors

• Magnetometers and Hall effect sensors

In the Process, Sense, Control, Actuate model, what is the primary function of the Sense step?

• To execute control algorithms.

• To detect and measure environmental parameters.

• To initiate mechanical movements.

• To process and store data.

What follows the Sense step in the Process, Sense, Control, Actuate model?

• Actuate

• Process

• Control

• Monitor

In CircuitPython, which file is typically used as the main script that runs on startup?

• boot.py

• main.py

• start.py

• code.py

What is the purpose of the CircuitPython library?

• To provide hardware schematics for CircuitPython boards.

• To offer pre-written code modules that simplify hardware interactions.

• To compile CircuitPython code into machine language.

• To manage file storage on CircuitPython devices.

How does an active sensor differ from a passive sensor?

• Active sensors require an external power source, while passive sensors do not.

• Passive sensors can emit signals, while active sensors can only detect signals.

• Active sensors are always larger in size compared to passive sensors.

• There is no difference; both types function the same way.

An example of an active sensor is:

• Thermistor

• Photovoltaic cell

• Radar sensor

• Passive infrared (PIR) sensor