PDI Questions Bank

The correct implementation of the CheckPaymentProcessor class must adhere to the PaymentProcessor interface. To accomplish this:

Use the implements keyword to signify that the CheckPaymentProcessor class is implementing the PaymentProcessor interface.

Define the pay method in the CheckPaymentProcessor class, as it is required by the PaymentProcessor interface.

The pay method must match the method signature defined in the PaymentProcessor interface (void pay(Decimal amount)).

Explanation of Option D:

It uses implements PaymentProcessor to correctly indicate that the class adheres to the interface.

The pay method is properly implemented with the required method signature and includes a placeholder for functional code.

Other Options:

Option A: The pay method is not implemented correctly (no method body).

Option B: Incorrect use of extends instead of implements (interfaces are implemented, not extended).

Option C: Same issue as Option B, with a slight variation in formatting.

A validation rule can ensure that the Lead Source field is populated before the Lead is converted. This prevents users from proceeding unless the required data is entered.

Why not other options?

A: Triggers are programmatic, whereas a declarative solution like validation rules is simpler and more efficient.

B: Lead Conversion field mapping maps fields between Lead and Account/Contact but cannot enforce field requirements.

C: A formula field is read-only and cannot enforce user input.

References:

Validation Rules Documentation

Salesforce CLI allows developers to automate deployments and run unit tests as part of a continuous integration (CI) pipeline. It is the most efficient tool for scripting these processes.

Best practices in Apex development for triggers and service layers include:

Avoiding DML operations and queries in loops.

Handling bulk processing efficiently.

Option A ensures compliance by performing all updates at the end, reducing the risk of hitting governor limits.