A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } } Which is the correct implementation?

Public class CreditcardPayment extends Payment { public override void makePayment(Decimal amount) { /*implementation*/ } }

Public class CreditCardPayment implements Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }

Public class CreditCardPayment extends Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }

Public class CreditCardPayment implements Payment { public override void makePayment(Decimal amount) { /*Implementation*/ } }

How should a developer write unit tests for a private method in an Apex class?

Use the TestVisible annotation.

Add a test method in the Apex class.

The Account object in an organization has a master detail relationship to a child object called Branch. The following automations exist: * Rollup summary fields * Custom validation rules * Duplicate rules A developer created a trigger on the Account object. What two things should the developer consider while testing the trigger code? Choose 2 answers

Rollup summary fields can cause the parent record to go through Save.

The trigger may fire multiple times during a transaction.

Duplicate rules are executed once all DML operations commit to the database.

The validation rules will cause the trigger to fire again.

What are two use cases for executing Anonymous Apex code? Choose 2 answers

To schedule an Apex class to run periodically

To run a batch Apex class to update all Contacts

To delete 15,000 inactive Accounts In a single transaction after a deployment

To add unit test code coverage to an org

Free Salesforce TVB-450 Exam Practice Questions & Explanations

Last updated on: Oct 31, 2026
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