Classes And Objects In Python — Part 1 MCQs with Explanations

The correct answer is A: Parent method Here's why: We have a class called `Parent` that has a method named `show` . This method prints "Parent method". Then, we create another class called `Child` that inherits from the `Parent` class. This means the `Child` class automatically gets all the methods and attributes of the `Parent` class. Importantly, the `Child` class doesn't define its own `show` method. It inherits the `show` method directly from `Parent` . We create an object of the `Child` class called `obj` . When we call `obj.show()` , Python looks for a `show` method in the `Child` class. Since it doesn't find one there, it looks in the `Parent` class (because `Child` inherits from `Parent` ). It finds the `show` method in the `Parent` class and executes it. Therefore, it prints "Parent method".

Let's break down this Python code step-by-step: First, we have a class called `MyClass`: This is like a blueprint for creating objects. Inside the class, we have `count = 0`: This is a class variable called `count`. It's shared by all instances (objects) of the `MyClass`. Initially, it's set to 0. Next, we have `def __init__(self):`: This is the constructor (initializer) of the class. It's automatically called when you create a new object of the class. Inside the constructor, we have `MyClass.count += 1`: This line increments the `count` class variable by 1 every time a new object is created. `MyClass.count` ensures we're updating the class variable, not an instance variable. Now, let's look at the object creation: `obj1 = MyClass()` This creates the first object of the class. The `__init__` method is called, and `MyClass.count` becomes 1. `obj2 = MyClass()` This creates the second object of the class. The `__init__` method is called again, and `MyClass.count` becomes 2. Finally, we have `print(obj1.count)`: This prints the value of the `count` variable. Since `count` is a class variable, `obj1.count` will access the class variable which is currently equal to 2. Therefore, the output is 2. So, the correct answer is Option A: 2

A blueprint for creating objects is the correct answer to “What is a class in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Using the class keyword is the correct answer to “How do you define a class in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Instances of a class is the correct answer to “What are objects in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Using the class name and parentheses is the correct answer to “How do you create an object of a class in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

It refers to the instance of the object is the correct answer to “What is the purpose of the self parameter in Python methods”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

By defining a function within the class is the correct answer to “How can you define a method in a Python class”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

By using the del keyword is the correct answer to “How can you delete an attribute of an object in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

The concept of bundling data and methods that operate on the data into a single unit is the correct answer to “What is encapsulation in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

It defines a method that belongs to the class rather than an instance is the correct answer to “What is the purpose of the @staticmethod decorator in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

It initializes the attributes of an object is the correct answer to “What is the __init__ method used for in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Using dot notation is the correct answer to “How can you access the attributes of an object in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

By creating a new class that is based on an existing class is the correct answer to “How can you inherit a class in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

It allows a subclass to provide a specific implementation of a method that is already defined in its superclass is the correct answer to “What is method overriding in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

It returns a string representation of an object is the correct answer to “What is the purpose of the __str__ method in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

It is called when an object is about to be destroyed is the correct answer to “What is the purpose of the __del__ method in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

__str__() is the correct answer to “Which function is called when the following Python code is executed? f = foo() format(f)”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

~ is the correct answer to “Which operator is overloaded by __invert__()”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

none of the mentioned is the correct answer to “Which operator is overloaded by __lg__()”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

| is the correct answer to “Which operator is overloaded by the __or__() function”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Creating an instance of class is the correct answer to “What is Instantiation in terms of OOP terminology”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Operator overloading is the correct answer to “The assignment of more than one function to a particular operator is . . . . . . . .”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

A class variable is shared among all instances of a class, while an instance variable is unique to each instance is the correct answer to “What is the difference between a class variable and an instance variable in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Using the class name and dot notation is the correct answer to “How can you access a class variable in Python”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

An object is the correct answer to “. . . . . . . . represents an entity in the real world with its identity and behaviour.”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

constructor is the correct answer to “. . . . . . . . is used to create an object.”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Special methods is the correct answer to “What are the methods which begin and end with two underscore characters called”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

To set an attribute is the correct answer to “What is setattr() used for”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

To access the attribute of the object is the correct answer to “What is getattr() used for”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

obj is the correct answer to “What is the output of the following code: class MyClass: x = 5 obj = MyClass() print(obj.x)”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Yes, this method of calling is called unbounded method call is the correct answer to “Is the following Python code valid? class B(object): def first(self): print("First method called") def second(): print("Second method called") ob = B() B.first(ob)”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

__eq__() is the correct answer to “Which function overloads the == operator”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

True is the correct answer to “What will be the output of the following Python code? class stud: def __init__(self, roll_no, grade): self.roll_no = roll_no self.grade = grade def display (self): print("Roll no : ", self.roll_no, ", Grade: ", self.grade) stud1 = stud(34, 'S') stud1.age=7 print(hasattr(stud1, 'age'))”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Test is the correct answer to “What does print(Test.__name__) display (assuming Test is the name of the class)”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

A special method that is automatically called when an object is created is the correct answer to “What is a constructor in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

class foo: def __init__(self, x): self.x = x def __lt__(self, other): if self.x < other.x: return True else: return False is the correct answer to “Which of the following Python code will print True? a = foo(2) b = foo(3) print(a < b)”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

It defines a method that belongs to the class and not the instance is the correct answer to “What is the purpose of the @classmethod decorator in Python classes”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

Child constructor is the correct answer to “What is the output of the following code: class Parent: def init(self): print('Parent constructor') class Child(Parent): def init(self): print('Child constructor') obj = Child()”. This question is standard in competitive examination syllabi for Classes And Objects In Python.

By prefixing the attribute name with an underscore (_) is the correct answer to “How can you create a private attribute in a Python class”. This question is standard in competitive examination syllabi for Classes And Objects In Python.