Problem
What are the exact structural differences between Singleton, Factory, Observer, and Decorator patterns, and when would you apply each?
Practicing as: Software Engineer interview at Berkshire Hathaway Homestate CompaniesHi, I'll play your Berkshire Hathaway Homestate Companies interviewer for the Software Engineer role. Answer the question above like we're in the room, and I'll respond the way a real interviewer would.
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