Python Advance Quiz

What will the output be?

• Sound

• Bark

• None

• Error

Answer explanation

Dog overrides Animal's speak() method, so a.speak() calls the one in Dog.

What does this code demonstrate?

• Method overloading

• Method overriding

• Polymorphic inheritance

• Encapsulation

Answer explanation

That code demonstrates method overriding and inheritance in object-oriented programming.

What's the result of this execution?

• 1 then 2

• 1 then StopIteration

• 1 then Error

• Error at first next()

Answer explanation

When a generator hits a return, it raises StopIteration(return_value). Second next() causes an error unless caught.

What will this print?

• D B A

• D B C A

• D C B A

• D B C A

Answer explanation

Python uses MRO (Method Resolution Order) — it walks B → C → A.

What does the df.dropna() method do?

• Fills missing values with 0

• Drops duplicate values

• Removes rows with any missing values

• Replaces NaNs with "NA"

What does a Python decorator do?

• Makes code more readable

• Wraps a function to extend or alter its behavior

• Encrypts a function

• Converts a function into a method

What does the super() function do in Python?

• Defines a superclass

• Accesses the base class's methods or properties

• Returns the name of the superclass

• Creates an instance of the parent class

Which built-in function is essential for dynamic class creation in Python?

• compile()

• dir()

• type()

• open()

Which of the following methods is commonly overridden in a metaclass?

• __call__()

• __init_() of the class

• __new__() of the metaclass

• __getitem__()

After df.groupby('category')['value'].mean(), what is returned?

• A DataFrame

• A Series with category as index

• A dictionary

• A scalar