Test your knowledge

1. When we send a high value (1) to a GPIO pin configured as output, the GPIO pin will have:

   1. 0 V.

   2. 6 V.

   3. The voltage specified in the position in which the IOREF jumper is located.

2. An instance of the mraa.Gpio class represents:

   1. A single GPIO pin in the board.

   2. All the I/O pins in the board.

   3. Two GPIO pins in the board.

3. When we create an instance of the mraa.Gpio class, we must specify:

   1. The pin number as an argument.

   2. The specific board and a pin number as arguments.

   3. The pin number and the desired direction: mraa.DIR_OUT or mraa.DIR_IN.

4. Which of the following lines write a high value to the GPIO pin configured as output with the instance of mraa.Gpio named gpio10:

   1. gpio10.write(0)

   2. gpio10.write(1)

   3. gpio10.write(mraa.HIGH_VALUE)

5. Which of the following lines configure the instance of mraa.Gpio named gpio10 for digital output:

   1. gpio10.dir(mraa.DIR_DIGITAL).out()

   2. gpio10.dir(mraa.DIR_OUT)

   3. gpio10.dir(mraa.DIR_OUT, mraa.DIGITAL)