Exam Plat-Dev-201 Topic 2 Question 158 Discussion

Actual exam question for Salesforce's Plat-Dev-201 exam
Question #: 158
Topic #: 2

A developer must implement a CheckPaymentProcessor class that provides check processing payment capabilities that adhere to what defined for payments in the PaymentProcessor interface.
public interface PaymentProcessor { void pay(Decimal amount); }
Which is the correct implementation to use the PaymentProcessor interface class?

A. Public class CheckPaymentProcessor extends PaymentProcessor { public void pay(Decimal amount);
} B. Public class CheckPaymentProcessor extends PaymentProcessor { public void pay(Decimal amount) {}
} C. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount);
} D. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount) {}
}

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