Python Exam Practice

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(Based on ENGINEER 1P13 computing material, written by Willie Pai)

For more study material, view all previous Pre-Lab & In-Lab Jupyter Notebooks

Topics Covered:

• Inputs and Outputs
• Built-in Functions
• Errors
• Defining and calling functions
• Passing Arguments
• Returning Values
• Variable Scope
• Lists
• String Operations
• For Loops
• Boolean Comparison Operators
• Decision Structures
• While Loops
• Opening/closing files
• Reading & looping through files (Methods)
• Writing & looping to files (Methods)
• Boolean Comparison Operators
• Decision Structures

Student resources

Computing Notes by Quinn Ha

Practice Quiz by peg

School resources

1P13 Lab A Computing Review

Online resources

2 Practice Quizzes from PythonSpot.com

Beginners Python Quiz

Operators and Expressions Quiz

List Quiz

If, Else and For Loop Quiz

1. What will the following code output?

print(25 % 4)

A) 25/4

B) 6.25

C) 1

D) 6

# Your answer: 
# TEST YOUR CODE HERE

2. What will the following code output?

print(25 / 4)

A) 25/4

B) 6.25

C) 1

D) 6

# Your answer: 
# TEST YOUR CODE HERE

3. What will the following code output?

print(25 // 4)

A) 25/4

B) 6.25

C) 1

D) 6

# Your answer: 
# TEST YOUR CODE HERE

4. Which output will this code produce?

a = 1
b = 2
c = "3"

print(a + b + c)

A) 6

B) TypeError

C) 33

D) 123

# Your answer: 
# TEST YOUR CODE HERE

5. What will the following code output if the input 25 was given?

first_value = input()
sum = first_value + str(3)
print(sum)

A) 253

B) 8

C) TypeError

D) 25 3

# Your answer: 
# TEST YOUR CODE HERE

6. Will the following code return True or False?

print(not(True and False) or not(False and False))

# Your answer: 
# TEST YOUR CODE HERE

9. Which of the following will return an error?

A) print('def HelloWorld(string):')

B) print(str(input('int("Hello!"):')))

C) print ( "Hello World!" )

D) print(13 + "years old")

# Your answer: 
# TEST YOUR CODE HERE

10. What will this code output?

some_list = ["One", "Two", "Three", "Four", "Five"]

for word in some_list:
    word.strip('e').split()
    print(word)

A)

On
Thr
Fiv
Svn
Nin

B)

On
Thr
Fiv
Seven
Nin

C)

['On']
['Thr']
['Fiv']
['Seven']
['Nin']

D)

One
Three
Five
Seven
Nine

E)

['O', 'n']
['T', 'h', 'r']
['F', 'i', 'v']
['S', 'e', 'v', 'e', n']
['N', 'i', 'n']

# Your answer: 
# TEST YOUR CODE HERE

11. Which of the following does not return an integer output of 3?

a = [1, 10, 25]
b = ['bed', 'blanket', 'pillow']
c = [2, 'hi', [1, 2]]

A) len(b[1].split()) + len(c) - a[0]

B) len(c[1]) - len(str(a[2])) + round(len(b[0]))

C) sum(c[2]) + b[2].index('l') - (a[2] % 11) + 1

D) c[2].index(2) - (a[1] / 10.0) + len(b[0])

# Your answer: 
# TEST YOUR CODE HERE

12. How many times will the string Proceed be printed?

list_a = [2, 4, 6, 8]
list_b = [1, 3, 5, 9]

result = 0;

for i in list_a:
    for j in list_b:
        if i < j and i * j > result:
            result += 1
            print("Proceed")

A) 6 times

B) 7 times

C) 8 times

D) 9 times

# Your answer: 
# TEST YOUR CODE HERE

13. Which of the following functions will print the integer 2021?

A)

x = 2020

def modify():
    x = 2021
    global x
    return x
    
print(modify())

B)

x = 2020

def modify(y):
    global x
    x = 2021
    return y
    
print(modify(x))

C)

x = 2020

def modify(y):
    global x
    y = x
    x = 2021
    return(y)
    
modify(x)
print(x)

D)

x = 2020

def modify(y):
    global x
    return y
    x = 2021
    return x

print(modify(x))

# Your answer: 
# TEST YOUR CODE HERE

14. Which of the following functions returns a list of even numbers found inside a given list of integers?

A)

def returnEven(list):
    even_numbers = []
    for i in range(list):
        if i % 2 == 0:
            even_numbers.append(i)
    return even_numbers

B)

def returnEven(list):
    even_numbers = []
    for number in list:
        if i % 2 == 0:
            even_numbers += number
    return even_numbers

C)

def returnEven(list):
    even_numbers = []
    for i in range(len(list)):
        if list[i] % 2 == 0:
            even_numbers.append(list[i])
        return even_numbers

D)

def returnEven(list):
    even_numbers = []
    for number in even_numbers:
        if number % 2 == 0:
            even_numbers.append(number)
    return even_numbers

# Your answer: 
# TEST YOUR CODE HERE

15. Which follow code outputs the same result as this for loop?

for i in range(10):
    i += 2
    print(i)

A)

x = 10
while x < 30:
    print(int(x / 2 - 3))
    x += 2

B)

x = 2
while x <= 12:
    print(x)
    x += 1

C)

x = 2
while x < 12:
    x += 1
    print(x)

D)

x = 0
while x > 12:
    print(x)
    x += 1

# Your answer: 
# TEST YOUR CODE HERE

16. True or False: In Python, a variable must be declared before it is assigned a value.

# Your answer: 
# TEST YOUR CODE HERE

17. True or False: The ‘in’ operator is used to check if a value exists within an iterable object container such as a list. Evaluates to true if it finds a variable in the specified sequence and false otherwise.

# Your answer: 
# TEST YOUR CODE HERE

18. True or False: Not writing a return statement inside of a function will result in an error

# Your answer: 
# TEST YOUR CODE HERE

19. True or False: Tuples are mutable data types; lists are immutable data types

# Your answer: 
# TEST YOUR CODE HERE

20. Given a text file, document.txt, that has the following text:

['A', 1]
['B', 2]
['C', 3]
['D', 4]
['E', 5]

What will the following code output?

file = open("document.txt", 'r')

for line in file.readlines():
    print(line[1])

file.close()

A)

1
2
3
4
5

B)

"1"
"2"
"3"
"4"
"5"

C)

'
'
'
'
'

D)

A
B
C
D
E

# Your answer: 
# TEST YOUR CODE HERE

21. Given a text file, document.txt, that has the following text:

One A
Two B
Three C
Four D
Five E

Where each line is a string and an integer seperated by a space (" ").

Which code will give the following output?

One
A
Two
B
Three
C
Four
D
Five
E

A)

file = open("document.txt", 'r')
for line in file.readlines():
    print(line)
file.close()

B)

file = open("document.txt", 'r')
for line in file.readlines():
    print(line)
    line = file.readline()
    print(line)
file.close()

C)

file = open("document.txt", 'r')
line = file.readline()
while line != "":
    line.split()
    print(line[0])
    print(line[1])
file.close()

D)

file = open("document.txt", 'r')
line = file.readline()
while line != "":
    print(line.split()[0] + "\n" + line.split()[1])
    line = file.readline()
file.close()

# Your answer: 
# TEST YOUR CODE HERE

22. Given a function definition explaining the purpose of the function, rewrite the function to correct its error.

def divideByTwo(numbers):
    '''
    Given a list of integers, return a list of floats containing half the value of each integer
    '''
    half_numbers = []
        for num in numbers:
        half_num = num / 2
    half_numbers.append(num)
    return half_numbers

Double click to write your answer here in this cell. Don't delete the ``` marks.