A developer identifies the following triggers on the Expense_c object:
DeleteExpense,
applyDefaultstoexpense
validateexpenseupdate;
The triggers process before delete, before insert, and before update events respectively.
Which two techniques should the developer implement to ensure trigger best practice are followed?

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 Visualforce page has a standard controller for an object that has a lookup relationship to a parent object.
How can a developer display data from the parent record on the page?

Which statement generates a list of Leads and Contacts that have a field with the phrase 'ACME'?

A company wants a recruiting app that models candidates and interviews; displays the total number of interviews on each candidate record; and defines security on interview records that is independent from the security on candidate records. What would a developer do to accomplish this task? Choose 2 answers