[Solved] Suppose you want to implement a prototype pattern for an object that contains references to other objects which themselves may... Which approach correctly handles deep copying in this scenario? | OOP & Design Patterns

OOP & Design Patterns - Prototype Pattern - Deep Copy vs Shallow Copy

Suppose you want to implement a prototype pattern for an object that contains references to other objects which themselves may reference back to the original object (cyclic references). Which approach correctly handles deep copying in this scenario?

AUse a deep copy implementation with memoization to track already copied objects and avoid infinite recursion

BUse a naive recursive deep copy without memoization, which will eventually copy all objects

CUse shallow copy to avoid recursion issues, accepting shared nested references

DSerialize the object to JSON and deserialize it, which naturally handles cyclic references

Step-by-Step Solution

Step 1: Understand cyclic references problem
Naive recursion without tracking copied objects causes infinite recursion on cycles.
Step 2: Evaluate solutions
Memoization tracks already copied objects, preventing infinite loops and ensuring correct deep copy. Shallow copy shares references, breaking independence. JSON serialization cannot handle cycles and will fail.
Final Answer:
Option A -> Option A
Quick Check:
Memoization prevents infinite recursion in cyclic graphs [OK]

Quick Trick: Memoization is essential for deep copying cyclic object graphs [OK]

Common Mistakes:

MISTAKES

Ignoring cycles causes infinite recursion or stack overflow

Trap Explanation:

PITFALL

Candidates often overlook cycles and assume naive recursion suffices.

Interviewer Note:

CONTEXT

Tests candidate's understanding of deep copy edge cases and robustness in complex object graphs.

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Which approach correctly handles deep copying in this scenario?

Step 1: Understand cyclic references problem

Step 2: Evaluate solutions

Final Answer:

Quick Check:

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