Quiz Review

Background

The quiz will be based on the topics covered in weeks 4 through 6. There are 3 sections — short answer questions, tracing, and a programming problem. Students are allowed to use the Thonny IDE for Section III only. Please see the grading rubric for the programming problem. Scratch paper and a simple calculator are allowed.

Section I (20 points)

1. How many times does the following loop iterate?

i = 0
while i <= 45:
    print(i)
    i = i + 5

2. What sequence is generated by range(3, 33, 3)

3. What happens when you run this Python program?

tip = compute_tip_amount(100, 15)    
print(tip)
 
def compute_tip_amount(bill_amount, tip_percentage):
    return(bill_amount * (tip_percentage / 100))

• A. The program prints: 15.0
• B. NameError: name ‘compute_tip_amount’ is not defined
• C. NameError: name ‘tip’ is not defined
• D. NameError: name ‘bill_amount’ is not defined`

4. Convert the following for loop statement to a while loop:

sum = 0
for i in range(100, 0, -2):
    sum = sum + i
    print(sum)

5. Assume, age = 24, height = 6

not (age <= 18 or height != 6)

What is the value of the expression?

• A. True
• B. False

6. Find the error in the following Python code:

Line 1: def function1(y):
Line 2:     result = x + y
Line 3:     print(result)
Line 4:
Line 5: function1(5)

• Which line number has an error.
• Explain in one sentence, what is the error.

7. What will be the output of the following?

sum_val = 0

for i in range(4, 16, 3):
    sum_val += i

print(sum_val)

8. What will be the output of the following?

num = 24

def print_number():
    num = 4
    print(num)

print_number()
print(num)

9. Consider the following Python program.

def find_max(num1, num2, num3):
    max_val = max(num1, num2, num3)
    return max_val

print(find_max(2, 3, 5))

What will be the output?

10. Assume a = 1, b = 1, c = 3, d = 4, e = 5:

( (a <= c) or ( (c + 2 == e) and (c - b > a) ) )

What is the value of the expression?

• A. True
• B. False

Section II (30 points)

Trace the execution of the following program by filling in a tracing table. You can draw the tracing table on a piece of paper and include an image file (tracing.png) on Blackboard.

You may use the following guide for reference:

• Tracing Worksheet

count = 3
result = 1
while count > 0:
    result = result * count
    count = count - 1
print(result)

Section III (50 points)

Programming question:

• You can use the Thonny Python IDE for writing the program.

Write a module that contains the following two functions:

# Converts from Celsius to Fahrenheit
# Returns the result in Fahrenheit
def celsius_to_fahrenheit(celsius):

# Converts from Fahrenheit to Celsius
# Returns the result in Celsius
def fahrenheit_to_celsius(fahrenheit):

The formulas for the conversion are:

\(Fahrenheit = (Celsius \times 1.8) + 32\)
\(Celsius = \frac{Fahrenheit - 32}{1.8}\)

Test your functions by writing code that invokes these functions to display the following tables:

   Celsius  |  Fahrenheit
--------------------------
         0  |        32.0
        10  |        50.0
        20  |        68.0
        30  |        86.0
        40  |       104.0
        50  |       122.0
        60  |       140.0
        70  |       158.0
        80  |       176.0
        90  |       194.0
       100  |       212.0

Fahrenheit  |     Celsius
--------------------------
       -20  |       -28.9
       -10  |       -23.3
         0  |       -17.8
        10  |       -12.2
        20  |        -6.7
        30  |        -1.1
        40  |         4.4
        50  |        10.0
        60  |        15.6

In the code used to test your functions:

• Use a loop and call the celsius_to_fahrenheit(celsius) function to print the table. Input statements are not required as the loop runs from 0 to 100 (see the sample table)
• Use a loop and call fahrenheit_to_celsius(meter) function to print the table. Input statements are not required as the loop runs from -20 to 60 (see the sample table)

Grading Rubric for Section III: