Which of the following constructor definitions will cause a syntax error in Python?

easy📝 Syntax Q3 of Q15

Python - Constructors and Object Initialization

Adef __init__(self, x, y=20):

Bdef __init__(self, x, y):

Cdef __init__(self, x=10, y=20):

Ddef __init__(self, x=10, y):

Step-by-Step Solution

Solution:

Step 1: Recall parameter order rules
In Python, parameters with default values must come after parameters without defaults.
Step 2: Analyze each option
def __init__(self, x=10, y): has a default parameter x=10 before y without default, causing syntax error. Others follow correct order.
Final Answer:
def __init__(self, x=10, y): causes syntax error -> Option D
Quick Check:
Default params must follow non-defaults [OK]

Quick Trick: Non-default parameters must come before default ones [OK]

Common Mistakes:

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