Salesforce 面试题与答案
问题 11. Explain the use of the @future annotation in Apex.
The @future annotation in Apex is used to run a method asynchronously in the background, typically for long-running operations that would otherwise exceed governor limits.
问题 12. What is the difference between a custom controller and a controller extension in Visualforce?
A custom controller is a standalone Apex class that provides controller logic for a Visualforce page, while a controller extension is used to extend the functionality of a standard or custom controller.
问题 13. Explain the purpose of the Schema Builder in Salesforce.
Schema Builder is a visual tool in Salesforce that allows users to create and modify objects, fields, and relationships using a point-and-click interface, without writing code.
问题 14. What is a Salesforce trigger context variable?
Trigger context variables, such as Trigger.new and Trigger.old, provide information about the records being processed by a trigger. They allow developers to access and manipulate data within the trigger.
问题 15. How can you schedule a job in Salesforce?
You can schedule a job in Salesforce using the Apex Scheduler. This involves using the System.schedule method to specify a time and frequency for executing a piece of Apex code.
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