What would be the result of instantiating a class template with a user-defined type that does not meet the template’s expected type requirements? 

  • A runtime error 
  • A compilation error 
  • The template would adapt automatically 
  • The system would crash
Instantiating a class template with a type that doesn't meet the template's requirements would result in a compilation error. Templates rely on the types they are instantiated with to adhere to specific criteria. If those criteria aren't met, the compiler will produce an error message indicating the discrepancies.
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