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If you want to modify the Template Method Pattern to allow clients to dynamically skip multiple steps at runtime, which design change fundamentally alters the original pattern's intent?

hard📘 Fundamental Understanding Q10 of Q15
OOP & Design Patterns - Template Method Pattern - Define Skeleton, Override Steps
If you want to modify the Template Method Pattern to allow clients to dynamically skip multiple steps at runtime, which design change fundamentally alters the original pattern's intent?
AMaking all step methods abstract to force subclass implementation
BAdding multiple hook methods that return booleans to conditionally skip steps
CReplacing fixed algorithm skeleton with a strategy object for each step
DUsing inheritance to override only one step method
Step-by-Step Solution
Solution:

  1. Step 1: Understand original pattern intent

    Template Method fixes algorithm skeleton in base class.

  2. Step 2: Analyze proposed changes

    Adding hooks preserves skeleton; replacing steps with strategy objects delegates control.

  3. Step 3: Identify fundamental change

    Replacing steps with strategy objects changes from fixed skeleton to flexible composition.

  4. Final Answer:

    Option C -> Option C

  5. Quick Check:

    Strategy pattern replaces Template Method's fixed skeleton [OK]
Quick Trick: Strategy objects replace fixed skeleton, changing pattern fundamentally [OK]
Common Mistakes:
MISTAKES
  • Thinking multiple hooks preserve original pattern
  • Confusing abstract steps with dynamic skipping
  • Assuming inheritance alone allows dynamic skipping
Trap Explanation:
PITFALL
  • Adding hooks seems dynamic but keeps skeleton fixed; only strategy replaces it.
Interviewer Note:
CONTEXT
  • Tests deep understanding of Template Method vs Strategy pattern differences.
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