C&R ECA QUIZ: Coding Concepts Review

What is the purpose of the digitalio module in this project?

• To handle real-time clock operations

• To interface with digital input and output pins

• To generate sound for the buzzer

• To store variables in memory

What is the function of board.GP0 in the code?

• It assigns a digital pin to an LED

• It specifies a GPIO pin for input handling

• It configures the microcontroller’s clock

• It controls the buzzer frequency

Why is button_start.pull = digitalio.Pull.UP used in the program?

• To ensure the button reads False when pressed

• To set the button in output mode

• To pull the button signal low when pressed

• To disable button functionality

What does time.monotonic() return?

• The system’s current time

• The elapsed time since the program started

• The system’s UTC timestamp

• A random delay value

How does the program determine when the user has activated the reminder?

• By checking if button_start.value is False

• By measuring the water level in a container

• By monitoring CPU usage

• By detecting ambient temperature changes

Why is while time.monotonic() < end_time: used in the loop?

• To keep the program running indefinitely

• To create a delay before executing the next line of code

• To ensure the loop runs until the timer duration expires

• To exit the loop when a button is pressed

What will happen if buzzer_status is set to True?

• The buzzer will start generating a sound

• The program will terminate

• The timer will be extended

• The buzzer will remain off

What is the default duration for the water reminder timer in the provided code?

• 3 seconds

• 5 seconds

• 10 seconds

• 15 seconds

How does the program ensure Button B resets the reminder?

• It sets buzzer_status = False when button_stop.value is False

• It restarts the microcontroller

• It pauses the execution for 5 seconds

• It disables all buttons

What is the purpose of simpleio.tone(buzzer_pin, 800, 0.5)?

• To send digital signals to an LED

• To generate an 800 Hz tone for 0.5 seconds

• To print a message on the console

• To reset the buzzer