G10 Unit 2 Exercises

What is an object in Python?

• A variable

• An instance of a class

• A blueprint for creating classes

• A keyword

How do you create an object of a class in Python?

• By using the class name followed by parentheses

• By importing the class from a module

• By using the new keyword followed by the class name

• By declaring a variable as an instance of the class type

What is the purpose of the __init__ method in a class in Python?

• To initialize instance variables of a class object

• To define class methods

• To create objects

• To import modules

Choose the output that will be printed by the following Python program: class Rose:

def __init__(self, name, color):

self.name = name

self.color = color

rose = Rose("Red Rose", "Red")

print(rose.name)

• Red Rose

• Rose

• Red

• None of the above

Choose the output that will be printed by the following Python program: class Rose:

def __init__(self, name, color):

self.name = name

self.color = color

def smell(self):

print(self.name)

rose = Rose("Red Rose", "Red")

rose.smell()

• Red Rose

• Fragrant!

• Red

• Rose

Choose the output that will be printed by the following Python program: class Flower:

def __init__(self, name, color, fragrance):

self.name = name

self.color = color

self.fragrance = fragrance

flower = Flower("Rose", "Red", True)

if flower.fragrance:

print("This flower has a fragrance.")

else:

print("This flower does not have a fragrance.")

• This flower has a fragrance.

• Red

• This flower does not have a fragrance.

• Rose

What is a higher-order function?

• A function that takes one or more functions as arguments

• A function that only operates on numbers

• A function that returns another function as a result

• A function that can only be used once

Choose the output that will be printed by the following Python program: def square(x):

return x * x

def apply(func, x):

return func(x)

result = apply(square, 5)

print(result)

• 25

• 5

• square

• None of the above

Choose the output that will be printed by the following Python program: def square(x):

return x * x

def add(x, y):

return x + y

def combine(func1, func2):

def new_func(x, y):

return func1(x) + func2(y)

return new_func

combined = combine(square, square)

result = combined(2, 3)

print(result)

• 25

• 13

• 5

• None of the above

What is the purpose of the math library in Python?

• To perform basic mathematical operations

• To send emails

• To handle file and directory operations

• To perform scientific and mathematical operations on arrays