Developer

Platform Developer I

Validates your skills building custom applications on the Salesforce Platform with Apex and Lightning Web Components — data modeling, Apex programming, testing, debugging, and UI basics.

Study Plan

Lesson

What is Apex?

Lesson

Variables and Data Types

Lesson

Writing Your First Apex Class

Lesson

If Statements and Loops

Lesson

Lists, Sets, and Maps

Lesson

String and Collection Methods

Lesson

SOQL Basics

Lesson

DML Operations

Lesson

Bulk Patterns and Governor Limits

Lesson

Trigger Context Variables

Lesson

The One-Trigger-Per-Object Pattern

Lesson

Trigger Best Practices

Lesson

Future Methods

Lesson

Queueable Apex

Lesson

Batch Apex

External Resource

Trailhead: Apex Basics & Database ↗

Salesforce's own official trail covering Apex fundamentals — a good cross-check alongside the lessons above.

Practice Exam

Platform Developer I — Practice Exam 1

Practice Exams

Pro

Platform Developer I — Practice Exam 1 Take Exam