Solution:Step 1: Analyze references to first NodeSetting head to None removes the reference to the first Node object.Step 2: Determine object reachabilitySince no other references point to the first Node, it becomes unreachable and can be garbage collected.Final Answer:It becomes unreachable and eli

[Solved] Consider this code:class Node: def __init__(self, value): self.value = value self.next = None head = Node(1) head.next = Node(2) head = NoneWhat happens to the first Node object after head = None? | Python

Python - Classes and Object Lifecycle

Consider this code:

class Node:
    def __init__(self, value):
        self.value = value
        self.next = None

head = Node(1)
head.next = Node(2)
head = None

What happens to the first Node object after head = None?

AIt causes a runtime error

BIt remains accessible through head

CIt is immediately deleted and __del__ called

DIt becomes unreachable and eligible for garbage collection

Step-by-Step Solution

Solution:

Step 1: Analyze references to first Node
Setting head to None removes the reference to the first Node object.
Step 2: Determine object reachability
Since no other references point to the first Node, it becomes unreachable and can be garbage collected.
Final Answer:
It becomes unreachable and eligible for garbage collection -> Option D
Quick Check:
Unreferenced objects = Eligible for garbage collection [OK]

Quick Trick: Objects without references are cleaned up by garbage collector [OK]

Common Mistakes:

Thinking object remains accessible
Expecting immediate deletion
Assuming runtime error occurs

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More Python Quizzes

Consider this code:

Step 1: Analyze references to first Node

Step 2: Determine object reachability

Final Answer:

Quick Check:

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