Suppose we have a Student with id=”4”. If we delete the Student with id=”4”, what will be the result of the following queries:

 

  • Student.find(4)
  • Student.find_by_id(4)



  • Student.find(4)     will raise an error: ActiveRecord::RecordNotFound: Couldn't find Student with id=4
  • Student.find_by_id(4) will return nil and will not raise an error.

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