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If the parking lot system uses a Factory pattern to create parking spots, what is the space complexity impact when adding a new spot type that requires additional attributes?

medium🪤 Complexity Trap Q6 of Q15
OOP & Design Patterns - Design a Parking Lot - LLD with OOP (Classes, Patterns, Extensibility)
If the parking lot system uses a Factory pattern to create parking spots, what is the space complexity impact when adding a new spot type that requires additional attributes?
ASpace complexity increases linearly with the number of spot types due to additional class definitions
BSpace complexity remains constant as Factory pattern only affects object creation logic
CSpace complexity increases exponentially with each new spot type added
DSpace complexity decreases because Factory reuses existing spot objects
Step-by-Step Solution
Solution:

  1. Step 1: Understand Factory pattern role

    Factory encapsulates creation but new spot types require new classes with attributes.

  2. Step 2: Analyze space impact

    Each new spot type adds class definitions and possibly new attributes, increasing space linearly.

  3. Step 3: Evaluate other options

    Factory does not keep space constant (B); exponential growth (A) is unrealistic; Factory does not reuse objects (D).

  4. Final Answer:

    Option A -> Option A

  5. Quick Check:

    New classes add linear space overhead [OK]
Quick Trick: New classes add linear space overhead [OK]
Common Mistakes:
MISTAKES
  • Assuming Factory pattern doesn't affect space
  • Overestimating space growth as exponential
  • Thinking Factory reuses objects to save space
Trap Explanation:
PITFALL
  • Candidates confuse Factory's creation logic with runtime object reuse, missing class-level space costs.
Interviewer Note:
CONTEXT
  • Evaluates understanding of design patterns' impact on space complexity.
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