If you want to reuse parts already built in a complex object (e.g., reuse walls and roof when building multiple houses), which modification to the Builder pattern is most appropriate?

hard🎤 Interviewer Follow-up Q15 of Q15

OOP & Design Patterns - Factory vs Abstract Factory vs Builder - When to Use Each

AModify the Builder to reset the product after each get_result call to avoid reuse.

BUse Abstract Factory instead, as it naturally supports part reuse.

CCache built parts inside the Builder and reuse them when building new objects.

DSwitch to Factory pattern for simpler object creation and reuse.

Step-by-Step Solution

Step 1: Understand reuse requirement
Reusing parts means the Builder should keep built parts cached and reuse them instead of rebuilding.
Step 2: Evaluate options
Cache built parts inside the Builder and reuse them when building new objects. caches parts inside Builder, enabling reuse. Modify the Builder to reset the product after each get_result call to avoid reuse. resets product, preventing reuse. Abstract Factory and Factory do not handle stepwise reuse well.
Final Answer:
Option C -> Option C
Quick Check:
Caching parts in Builder enables reuse efficiently [OK]

Quick Trick: Cache parts in Builder to enable reuse [OK]

Common Mistakes:

MISTAKES

Resetting product disables reuse
Confusing Abstract Factory with Builder reuse

Trap Explanation:

PITFALL

Resetting product looks safe but breaks reuse; Abstract Factory does not handle stepwise reuse.

Interviewer Note:

CONTEXT

Tests candidate's depth in adapting Builder pattern for reuse scenarios.

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If you want to reuse parts already built in a complex object (e.g., reuse walls and roof when building multiple houses), which modification to the Builder pattern is most appropriate?

Step 1: Understand reuse requirement

Step 2: Evaluate options

Final Answer:

Quick Check:

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