Python Data Types

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Questions and Answers

Which of the following data types is immutable in Python?

`dict`
`set`
`tuple` (correct)
`list`

Given the following code snippet, what will be the output?

x = 5
if x > 10:
    print("Greater than 10")
elif x > 3:
    print("Greater than 3")
else:
    print("Less than or equal to 3")

`Less than or equal to 3`
No output
`Greater than 3` (correct)
`Greater than 10`

What is the primary purpose of the `continue` statement in a loop?

To terminate the loop entirely.
To skip the rest of the current iteration and proceed to the next iteration. (correct)
To execute the loop only once.
To restart the loop from the beginning.

What type of argument is passed to a function using the parameter name, such as `name="John"`?

Keyword argument (C) Signup and view all the answers

Which of the following is a characteristic of lambda functions in Python?

They can only have one expression. (C) Signup and view all the answers

What is the purpose of the `as` keyword when importing a module in Python?

To import the module with an alias. (C) Signup and view all the answers

Which module in the Python standard library provides functions for interacting with the operating system?

<code>os</code> (A) Signup and view all the answers

What is the purpose of `pip` in Python?

It is a package manager. (C) Signup and view all the answers

In object-oriented programming, what is a class?

A blueprint for creating objects (A) Signup and view all the answers

Which OOP concept involves bundling data and methods that operate on that data within a class?

Encapsulation (B) Signup and view all the answers

What is the purpose of the constructor method `init` in a Python class?

To initialize the object's attributes. (A) Signup and view all the answers

What does the `self` keyword refer to in a class method?

The current object (C) Signup and view all the answers

Which of the following represents the correct way to define a subclass `Dog` that inherits from a superclass `Animal`?

<code>class Dog(Animal):</code> (D) Signup and view all the answers

Which of the following data types can store key-value pairs?

<code>dict</code> (C) Signup and view all the answers

Given the code:

for i in range(2, 10, 2):
    print(i)

What will be the output?

<code>2\n4\n6\n8</code> (D) Signup and view all the answers

What will be the state of x after the execution of the following code?

x = 10
while x > 5:
    x -= 2
else:
    x += 1

7 (D) Signup and view all the answers

If a function does not have a `return` statement, what does it return by default?

<code>None</code> (A) Signup and view all the answers

Consider the following function definition:

def greet(name, greeting="Hello"):
    print(greeting + ", " + name)

Which of the following calls to greet would be invalid?

<code>greet(greeting="Evening", "David")</code> (C) Signup and view all the answers

Given the following, what is printed?

def func(*args, **kwargs):
    print(args)
    print(kwargs)

func(1, 2, 3, name="Alice", age=30)

<code>(1, 2, 3)\n{\'name\': \ 'Alice\', \ 'age\': 30}</code> (D) Signup and view all the answers

Which of the following is NOT a valid way to import the `sqrt` function from the `math` module?

<code>import sqrt from math; x = sqrt(4)</code> (A) Signup and view all the answers

Which of the following modules would you use to work with regular expressions?

<code>re</code> (C) Signup and view all the answers

Assume you want to install a package named `requests` using pip. Which command would you use?

<code>pip install requests</code> (A) Signup and view all the answers

Which of the following represents the correct order of steps in object-oriented programming?

Abstraction -> Encapsulation -> Inheritance -> Polymorphism (B) Signup and view all the answers

What is the key advantage of using inheritance in OOP?

It reduces code duplication. (B) Signup and view all the answers

What is polymorphism?

The ability of objects of different classes to respond to the same method call in their own ways. (D) Signup and view all the answers

Consider these two functions:

def modify_list(my_list):
    my_list.append(4)

my_list = [1, 2, 3]
modify_list(my_list)
print(my_list)

def modify_tuple(my_tuple):
    my_tuple += (4,)

my_tuple = (1, 2, 3)
modify_tuple(my_tuple)
print(my_tuple)

What happens when you run this code?

The first prints <code>[1, 2, 3, 4]</code> and the second produces an error (B) Signup and view all the answers

What is the output of the following code?

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n-1)

print(factorial(4))

24 (B) Signup and view all the answers

What is the output of the following code?

def func(a, b=5, c=10):
    print("a is", a, "and b is", b, "and c is", c)

func(3, 7)
func(25, c=24)
func(c=50, a=100)

<pre><code class="language-text">a is 3 and b is 7 and c is 10 a is 25 and b is 5 and c is 24 a is 100 and b is 5 and c is 50 ``` (C) </code></pre> Signup and view all the answers

What will be the output of the following Python code?

my_list = [1, 2, 3, 4, 5]
new_list = list(map(lambda x: x * 2, my_list))
print(new_list)

[2, 4, 6, 8, 10] (D) Signup and view all the answers

What is the output of the following code snippet?

def outer_function(x):
    def inner_function(y):
        return x + y
    return inner_function

closure = outer_function(10)
print(closure(5))

15 (B) Signup and view all the answers

What data structure does `**kwargs` represent when used as a parameter in a function definition?

A dictionary of arguments (C) Signup and view all the answers

Given the following code, what will the output be?

class Animal:
    def __init__(self, name):
        self.name = name

    def speak(self):
        return "Generic animal sound"

class Dog(Animal):
    def speak(self):
        return "Woof!"

animal = Animal("Generic")
dog = Dog("Buddy")

print(animal.speak())
print(dog.speak())

<code>Generic animal sound\nWoof!</code> (D) Signup and view all the answers

What is the purpose of the `super()` function in Python inheritance?

To call a method from the parent or superclass. (B) Signup and view all the answers

What is the output of the following code?

class A:
    def __init__(self):
        self.value = 5

    def get_value(self):
        return self.value

class B(A):
    def __init__(self):
        super().__init__()
        self.value = 10

b = B()
print(b.get_value())

10 (A) Signup and view all the answers

Flashcards

What is Python?

A high-level, interpreted, general-purpose programming language that emphasizes code readability.

What is an `int`?

Whole numbers, without any decimal part.