PDI Exam Dumps | A developer must create a ShippingCalculator class that cannot be instantiated and must include a working

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Question 144/230

A developer must create a ShippingCalculator class that cannot be instantiated and must include a working default implementation of a calculate method, that sub-classes can override. What is the correct implementation of the ShippingCalculator class?

A. Public abstract class ShippingCalculator {
public override calculate() { /*implementation*/ }
}

B. Public abstract class ShippingCalculator {
public virtual void calculate() { /*implementation*/ }
}

C. Public abstract class ShippingCalculator {
public abstract calculate() { /*implementation*/ }
}

D. Public abstract class ShippingCalculator {
public void calculate() { /*implementation*/ }
}

Recent Comments (The most recent comments are at the top.)

Main_Contact - Jul 18, 2024

B is the correct answer
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_example.htm

MD. RIFAT ANWAR - Jul 07, 2024

CORRECT ANSWER IS -
D: Public abstract class ShippingCalculator {
public void calculate() { /*implementation*/ }
}

Explanation Why Correct:
D: This option correctly defines an abstract class with a concrete method `calculate`. The method is not abstract, meaning it provides a default implementation that can be used or overridden by subclasses. In Apex, abstract classes cannot be instantiated, which meets the requirement.

INCORRECT OPTIONS:
A: This is not correct as `override` is used when a subclass is overriding a method from a superclass, not within the abstract class itself.

B: This is not correct because `virtual` is used to allow a method to be overridden, but the class should not be abstract if it provides a default implementation.

C: This is also not correct because an abstract method cannot have an implementation, and the requirement is to have a working default implementation.

mahima - Apr 04, 2023

B is the correct Answer

Julen - Mar 28, 2023

B is the correct Answer

Question 144/230

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