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?

Refer to the following code snippet for an environment has more than 200 Accounts belonging to the Technology' industry:

When the code execution, which two events occur as a result of the Apex transaction?
When the code executes, which two events occur as a result of the Apex transaction?
Choose 2 answers

A developer considers the following snippet of code:

Based on this code, what is the value of x?

Which option should a developer use to create 500 Accounts and make sure that duplicates are not created for existing Account Sites?

A developer wrote Apex code that calls out to an external system. How should a developer write the test to provide test coverage?