Lesson 3 Quiz: Calculations with Variables

Test your understanding of using variables for math, conversions, and clear Serial output

32-Week Course � Semester 1

Quiz Instructions

� This quiz covers material from Lesson 3: Calculations with Variables
� 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

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Question 1: Choosing a Variable Type

Which variable type is the best choice for a temperature value like 23.5?

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

Question 2: Arithmetic

If int apples = 3; and int oranges = 5;, what does apples + oranges equal?

A) 15 B) 8 C) 35 D) 2

Question 3: Reading a Formula

What does this formula do? float fahrenheit = (celsius * 9.0 / 5.0) + 32.0;

A) It converts Fahrenheit to Celsius B) It converts Celsius to Fahrenheit C) It finds the average temperature D) It rounds the temperature

Question 4: Constants

What is the purpose of a line like const int totalPoints = 10;?

A) It makes a text message B) It stores a value that should not change C) It turns a variable into a decimal D) It sends the answer to the Serial Monitor

Question 5: Percentages

If a student scores 8 out of 10, which expression correctly calculates the percentage?

A) score + total * 100 B) (score / 10.0) * 100.0 C) score - total / 100 D) score * total * 100

Question 6: Serial Output

Which code best prints a label and a value clearly, like Score: 8, to the Serial Monitor?

A) Serial.println(score + "Score"); B) Serial.print("Score: "); Serial.println(score); C) Serial.print(score); Serial.print(score); D) Serial.println("Score" score);

Question 7: Code Analysis

Explain what happens in this code snippet:

int score = 8;
int total = 10;
float percentage = (score / 10.0) * 100.0;
Serial.println(percentage);

Question 8: Simple Calculator Program

Describe the simple calculator-style program you created. What values did you use, what calculation did your code perform, and what did it print to the Serial Monitor?

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