Apex Annotations In Salesforce.

Here are some commonly used Apex annotations in Salesforce.

1. @AuraEnabled: 

This annotation is used to make Apex methods available for client-side access in Lightning components.

2. @TestSetup: 

This annotation is used to create test records that are used across all test methods within a test class.

3. @TestVisible: 

This annotation is used to make private class methods and variables available to test methods in the same or a different class.

4. @InvocableMethod: 

This annotation is used to expose Apex methods to the process builder, flow builder, and the API to perform custom automation.

5. @Deprecated: 

This annotation is used to mark Apex methods, variables, or classes as old and no longer used, but kept for backward compatibility.

6. @RemoteAction: 

This annotation is used to expose Apex methods to be called from JavaScript on Visualforce pages.

7. @SuppressWarnings: 

This annotation is used to Disable warnings for a specific class, method, or variable.

8. @ReadOnly: 

This annotation is used to mark fields as read-only, nothing the field cannot be updated.

9. @Future: 

This annotation is used to indicate that an Apex method runs asynchronously in a separate thread after the current transaction is completed.

10. @IsTest: 

This annotation is used to mark Apex methods as test methods.

11. @HttpPut: 

This annotation is used to mark Apex REST methods that accept HTTP put requests.

12. @HttpDelete: 

This annotation is used to mark Apex REST methods that accept HTTP delete requests.

13. @HttpPost: 

This annotation is used to mark Apex REST methods that accept HTTP post requests.

14. @HttpGet: 

This annotation is used to Identify methods that accept HTTP GET requests.

15. @HttpPatch: 

This annotation is used to Identify methods that accept HTTP PATCH requests.

16. @RestResource: 

This annotation is used to enable you to expose an Apex class as a REST resource.