Object-Oriented Programming for Data Modeling PCAD-31 Practice Questions (Page 6)

Questions 26–26

1. 26application · medium

   A data model class represents a financial transaction. The analyst wants to ensure the amount attribute can only be set to a non-negative value, and that when the object is printed, a clear summary is shown. Which implementation correctly enforces the validation and provides a readable print output?

   • AMake amount a public attribute and validate it in the __str__ method.
   • BUse a property with a setter that raises ValueError for negative values, and implement __str__ to return a summary.
   • CUse a private attribute _amount and provide a getter method but no setter.
   • DValidate amount in the __init__ method only and implement __repr__ for printing.
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