Platform Developer I Certification Practice Test 2026
Build custom business logic and interfaces on the Lightning Platform with Apex and Lightning Web Components. Automation & Logic plus Developer Fundamentals are over half the exam, so that's where our method puts your reps.
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Prepare under the exact same conditions as exam day. Our interface faithfully replicates the official Salesforce environment: timer, mark for review, and question formats. And if the real thing doesn't go your way, we refund you.
Exam Weight Distribution
Visualize the importance of each domain to optimize your revision strategy.
Platform Developer I certification program structure
A modular method built for technical excellence, one domain at a time.
Developer Fundamentals
Multi-tenant concepts and MVC, declarative vs. programmatic customization (governor limits, formulas, roll-ups), data modeling with objects, relationships and external IDs, and Agentforce for Developers.
Process Automation and Logic
Apex classes and triggers, control flow, SOQL/SOSL/DML, governor limits, order of execution and recursion, exception handling, and combining declarative automation with code.
User Interface
Lightning Web Components (framework, benefits, events), custom UI with LWC, Flow and Visualforce, preventing UI security vulnerabilities, and Apex behind Lightning, Flow, and Agentforce components.
Testing, Debugging, and Deployment
Tests for triggers, controllers, classes and flows with multiple test data sources, Salesforce DX, CLI and Developer Console, debugging and monitoring flows, performance and async/batch jobs, and deployment environments and processes.
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Platform Developer I certification learning objectives
Automation & logic
The heaviest domain at 28%. Apex classes, triggers, SOQL/DML, governor limits, order of execution, and exception handling.
Developer fundamentals
Multi-tenant, MVC, declarative vs. code, data modeling, and Agentforce for Developers.
User interface
Lightning Web Components, UI security, and Apex behind Lightning, Flow, and Agentforce components.
Testing & deployment
Unit tests, Salesforce DX and CLI, debugging async jobs, and cross-environment deployment.
Frequently asked questions
Everything you need to know about the Platform Developer I exam.