A develop created these three roll-up summary fields on the custom object. Project_c:

The developer is asked to create a new field that should the ratio between rejected and approved timesheet for a given project.
What are two benefits of choosing a formula held instead of an Apex trigger to fulfill the request? Choose 2 answers

A developer must troubleshoot to pinpoint the causes of performance issues when a custom page loads in their org. Which tool should the developer use to troubleshoot?

Which Apex collection is used to ensure that all values are unique?

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 developer at Universal Containers is tasked with implementing a new Salesforce application that must be able to be maintained completely by their company's Salesforce administrator.
Which three options should be considered for building out the business logic layer of the application? (Choose three.)