Lesson 2 Quiz: Digital Output, Variables, and Serial Output

Test your understanding of pins, serial output, variables, conditionals, and basic C syntax

32-Week Course � Semester 1

Quiz Instructions

� This quiz covers material from Lesson 2: Digital Output, Variables, and Serial Output
� 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 if needed before submitting

Student Information

Full Name

Email Address

Question 1: Pin Modes

What does pinMode(13, OUTPUT); tell the Arduino to do?

A) Read a button on pin 13 B) Set pin 13 to send signals out C) Turn pin 13 off permanently D) Start serial communication on pin 13

Question 2: Digital Output

Which line of code turns a digital output on?

A) digitalWrite(ledPin, HIGH); B) pinMode(ledPin, OUTPUT); C) Serial.println(ledPin); D) delay(1000);

Question 3: Serial Output

What is the main difference between Serial.print() and Serial.println()?

A) Serial.print() uploads code and Serial.println() checks for errors B) Serial.print() stays on the same line, while Serial.println() moves to the next line C) They do exactly the same thing in every situation D) Serial.println() only works inside loop()

Question 4: Variables

Which variable type is best for storing a whole number like 10?

A) float B) int C) char D) bool

Question 5: Conditionals

What does if (count == 0) mean?

A) Set count equal to 0 B) Check whether count is equal to 0 C) Add 0 to count D) Print count to the Serial Monitor

Question 6: Syntax

Which statement about semicolons and comments is correct?

A) Semicolons begin comments, and // ends a statement B) A semicolon usually ends a statement, and // starts a comment C) Both semicolons and // are only used inside if statements D) Comments are required at the end of every line of code

Question 7: Code Analysis

Explain the difference between x = 0; and x == 0.

Question 8: Personal Program

Describe your blink-and-count program. How did you use digital output, variables, or Serial messages in your code?

← Back to Lesson 2

Next: Lesson 3 →