PCAP-31-03 4.3 Equip a Class with Methods PCAP-31 Practice Questions (Page 8)

Questions 36–40

1. 36application · easy

   A `Student` class has a method `set_grade(self, grade)` that sets `self.grade = grade`. After creating `student = Student()`, which call correctly sets the grade to 'A'?

   • B`student.set_grade('A')`
   • C`set_grade(student, 'A')`
   • D`student.set_grade(student, 'A')`
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2. 37application · easy

   In a `GameCharacter` class, the method `take_damage(self, amount)` needs to reduce the instance attribute `self.health` by `amount`. Which implementation is correct?

   • A`self.health -= amount`
   • B`health -= amount`
   • C`GameCharacter.health -= amount`
   • D`self.health = health - amount`
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4. 38application · easy

   A `Document` class has a method `save(self)` that needs to call a validation method `_validate(self)` before saving. Which line inside `save` correctly calls `_validate`?

   • A`Document._validate()`
   • B`_validate()`
   • C`self._validate()`
   • D`self._validate(self)`
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5. 39expert · medium

   A developer is debugging a `BankAccount` class where the `deposit` method is defined as `def deposit(self, amount): balance += amount`. When they call `account.deposit(100)`, they get a `NameError`. What is the root cause?

   • AThe method is not indented correctly.
   • BThe method is not using `self.balance` to reference the instance attribute.
   • CThe method is not defined with a `self` parameter.
   • DThe method is missing a return statement.
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6. 40expert · hard

   A `ShoppingCart` class has a method `add_item(self, item)` that calls `self._update_total(item.price)`. The `_update_total` method is defined as `def _update_total(self, price): self.total += price`. However, when adding multiple items, the total is not accumulating correctly. What is the likely cause?

   • AThe `self.total` attribute is being reset on each call.
   • BThe `add_item` method is not passing the item correctly.
   • CThe `_update_total` method is not using `self` correctly.
   • DThe `self.total` attribute is not initialized before the first call.
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