[Solved] What will be the output of this code?class A: def greet(self): return "Hello from A" class B: def greet(self): return "Hello from B" class C(A, B): pass obj = C() print(obj.greet()) | Python

Python - Multiple Inheritance and Method Resolution

What will be the output of this code?

class A:
    def greet(self):
        return "Hello from A"

class B:
    def greet(self):
        return "Hello from B"

class C(A, B):
    pass

obj = C()
print(obj.greet())

A"Hello from A"

BTypeError

CAttributeError

D"Hello from B"

Step-by-Step Solution

Solution:

Step 1: Understand method resolution order (MRO)
Class C inherits from A first, then B. Python looks for methods in the order of parents listed.
Step 2: Determine which greet() is called
Since A is first, C uses A's greet method, returning "Hello from A".
Final Answer:
"Hello from A" -> Option A
Quick Check:
MRO follows parent order = "Hello from A" [OK]

Quick Trick: First parent class method is used in multiple inheritance [OK]

Common Mistakes:

Assuming last parent class method is called
Expecting an error due to multiple parents
Confusing method names or forgetting MRO

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What will be the output of this code?

Step 1: Understand method resolution order (MRO)

Step 2: Determine which greet() is called

Final Answer:

Quick Check:

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