Create your first Apex trigger on the user object to automatically set forecasting checkbox before insert, and learn about code coverage requirements for deployment and next steps with test classes.

Create a before insert Apex trigger for the contact object to automatically set the phone field to a specific number, with setup steps and testing by creating a new contact.

Explore Salesforce validation triggers that enforce a nonblank phone number on accounts using before insert and before update events, with an error message when the field is blank.

Learn how to create and use maps in Apex: define map<string,string>, populate key-value pairs like USA->USD, India->INR, and retrieve values by key.

Create set and map in Apex trigger to auto-fill the sales rep field from the account owner. Use a set of owner IDs and a map to retrieve names.