Lesson 5 Quiz: Loops and Repetition with Arduino

Test your understanding of `loop()`, `for` loops, and repeated actions in Arduino

32-Lesson Course • Semester 1

Quiz Instructions

This quiz covers material from Lesson 5: Loops and Repetition with Arduino
Answer all questions to the best of your ability
Your responses will be emailed to your instructor for review
Take your time and think carefully about each answer
You can review the lesson material before submitting if needed

Student Information

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Question 1: What does `loop()` do?

What is the job of the Arduino `loop()` function?

A) It runs only one time when the board starts B) It repeats the code inside it again and again C) It only works with LEDs D) It replaces `setup()`

Question 2: Purpose of a `for` loop

When is a `for` loop especially useful?

A) When you want to repeat an action a specific number of times B) When you want to create a new resistor C) When you want to compare two values for equality D) When you want to stop all repetition

Question 3: Loop Variable

In `for (int i = 0; i < 5; i++)`, what does `i++` do?

A) It sets `i` back to zero every time B) It adds 1 to `i` after each repetition C) It compares `i` to 5 D) It turns the loop off immediately

Question 4: How many times?

How many times does this loop run?
for (int i = 0; i < 3; i++)

A) 1 time B) 2 times C) 3 times D) 4 times

Question 5: Tracing the values

In `for (int i = 0; i < 5; i++)`, which values does `i` take?

A) `1, 2, 3, 4, 5` B) `0, 1, 2, 3, 4` C) `0, 2, 4, 6, 8` D) `5, 4, 3, 2, 1`

Question 6: Repeated blinking

Why might you use a `for` loop in an LED blinking program?

A) To repeat the blink pattern a certain number of times B) To turn the LED into a sensor C) To remove delays from the code D) To stop the board from repeating

Question 7: Loops plus `if`

What does this idea mean: “If the button is pressed, blink the LED three times”?

A) Use only a variable and no logic B) Use an `if` statement for the decision and a loop for the repeated blinking C) Use only `setup()` D) Use a resistor to count for you

Question 8: Code reading

What happens when the loop condition becomes false?

A) Arduino shuts down B) The program continues with the next line after the loop C) The loop restarts from zero forever D) All variables disappear immediately

Question 9: Explain `loop()`

Explain in your own words how Arduino `loop()` is different from `setup()`.

Question 10: Repetition Project

Describe a simple Arduino program that uses repetition. What repeats, how many times does it repeat, and what is the result?

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