PD1 Apex Programming 5

Question 1

Which annotation marks an Apex method as callable from a Lightning component via the Lightning Data Service or Wire service?

Accepted Answer

@AuraEnabled

Answer

@AuraEnabled exposes an Apex method to Aura and LWC components so it can be called from the client side.

Question 2

What is the purpose of the `Trigger.isBefore` context variable?

Accepted Answer

Returns true when the trigger fires before the DML operation commits to the database

Answer

Trigger.isBefore returns true when the trigger context is a before event, meaning the record changes have not yet been saved.

Question 3

Which Apex feature allows you to mock HTTP callouts in test methods?

Accepted Answer

Test.setMock()

Answer

Test.setMock() registers an implementation of HttpCalloutMock or WebServiceMock so test methods can simulate HTTP responses.

Question 4

What is a common use case for the `@InvocableMethod` annotation?

Accepted Answer

Exposing Apex logic to Flow Builder as an action

Answer

@InvocableMethod exposes an Apex method so it can be called as an action from Flow Builder or Process Builder.

Question 5

Which governor limit governs the total number of records returned by all SOQL queries in a single transaction?

Accepted Answer

100,000 records

Answer

The total number of records retrieved by SOQL queries in a single transaction is limited to 50,000.

(PD1) Salesforce Certified Platform Developer 1 Practice Test