Why displays enhance projects in Arduino - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize the display in the setup function.

Arduino

void setup() {
  [1]();
}

Drag options to blanks, or click blank then click option'

Adisplay.begin()

Bdisplay.begin

Cdisplay.start()

Ddisplay.init

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting parentheses when calling display.begin

Using display.init which is not the correct function

Using display.start which does not exist

The display library requires calling display.begin() with parentheses to initialize the display properly.

2fill in blank

medium

Complete the code to clear the display before drawing.

Arduino

void loop() {
  [1]();
  display.display();
}

Drag options to blanks, or click blank then click option'

Adisplay.clear()

Bdisplay.clearDisplay()

Cdisplay.reset()

Ddisplay.erase()

Attempts:

3 left

💡 Hint

Common Mistakes

Using display.clear() which does not clear the buffer

Using display.reset() which is not a valid function

Using display.erase() which does not exist

The correct function to clear the display buffer is display.clearDisplay().

3fill in blank

hard

Fix the error in the code to print text on the display.

Arduino

display.setCursor(0, 0);
display.[1]("Hello World");
display.display();

Drag options to blanks, or click blank then click option'

AdrawText

Bprintln

Cwrite

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using display.println() which is not supported by the display library

Using display.write() which prints bytes, not strings

Using display.drawText() which does not exist

The correct function to print text on the display is display.print().

4fill in blank

hard

Fill both blanks to set text size and color before printing.

Arduino

display.setTextSize([1]);
display.setTextColor([2]);
display.print("Hi");

Drag options to blanks, or click blank then click option'

A2

BWHITE

CBLACK

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using BLACK color which makes text invisible on black background

Using text size 2 when smaller text is needed

Confusing text size with color values

Text size 1 is the default small size, and WHITE is the color to make text visible on a black background.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps words to their lengths if length is greater than 3.

Arduino

auto lengths = [1]: [2] for (auto& word : words) if ([3] > 3);

Drag options to blanks, or click blank then click option'

Aword

Bword.length()

Dwords

Attempts:

3 left

💡 Hint

Common Mistakes

Using words as key instead of word

Using word instead of word.length() for value

Using wrong condition variable

The dictionary maps each word to its length, and the condition checks if the length is greater than 3.