Plat-Dev-201 Verified 2026 Edition

Salesforce Certified Platform Developer IPractice Test

Master the Salesforce Certified Platform Developer I with the official PlanetCert Practice Test. Access real exam questions, professional-grade detailed explanations, and our advanced adaptive simulator. Pass your certification exam on the first attempt.

535 Total Questions
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Exam Information

Official specifications published by Salesforce

Exam Format

105 min
60 scored + up to 5 non-scored
68%
Intermediate

Registration

$200 USD
Kryterion Webassessor, Pearson VUE, or online proctoring
English, Japanese

Validity

Maintained through annual release maintenance modules
Complete release maintenance modules specific to this certification once per year; Maintenance modules are released each Salesforce release cycle

PLAT-DEV-201 Exam Topics and Domains

PLAT-DEV-201 is organized into 4 weighted domains. Expect to work with Apex, Flow Builder, Lightning Web Components, Visualforce, and more.

1

Developer Fundamentals

27%

Multi-Tenant Architecture and Design Frameworks

Multi-Tenant ConceptsMVC ArchitectureLightning Component Framework

Understand multi-tenant concepts and design frameworks, such as MVC architecture and Lightning Component Framework.

Declarative vs. Programmatic Customizations

Declarative Customization Use CasesProgrammatic Customization Use CasesGovernor Limits Awareness

Given a scenario, identify common use cases and best practices for declarative versus programmatic customizations, including governor limits, formula fields, and roll-up summaries.

Data Modeling

Objects and FieldsRelationshipsExternal IDs

Given a scenario, determine, create, and access the appropriate data model including objects, fields, relationships, and external IDs.

Agentforce for Developers

Agentforce Use Cases and Limitations

Understand use cases and limitations of using Agentforce for Developers.

2

Process Automation and Logic

28%

Declarative Process Automation Features

Flow BuilderApproval Processes

Identify the capabilities of the declarative process automation features.

Apex Variables, Constants, Methods, and Interfaces

Apex Variables and Data TypesConstants and MethodsApex Interfaces

Understand how to declare variables, constants, methods, modifiers, Apex interfaces, and the appropriate use cases for each.

Apex Control Flow Statements

Control Flow Constructs

Given a scenario, assess how Apex control flow statements will execute and when to apply different control flow statements.

SOQL, SOSL, and DML

SOQL (Salesforce Object Query Language)SOSL (Salesforce Object Search Language)DML (Data Manipulation Language)

Given a scenario, write SOSL, SOQL, and DML statements in Apex, and assess what they will return.

Apex Classes and Triggers

Apex ClassesApex TriggersSave Order of Execution
  • Given a scenario, follow best practices to write Apex classes and triggers.
  • Describe the relationship between Apex transactions, the save order of execution, and the potential for recursion and/or cascading.

Governor Limits and Exception Handling

Governor Limits in Apex TransactionsException Handling
  • Given a scenario, understand governor limits and their implications on Apex transactions.
  • Implement exception handling in Apex, including custom exceptions as needed.

Declarative and Apex Automation Together

Mixing Declarative and Programmatic Automation

Given a scenario, use declarative functionality and Apex together to automate business logic.

3

User Interface

25%

UI and Data Access Security

Security Vulnerabilities Prevention

Given a scenario, prevent user interface and data access security vulnerabilities.

Custom User Interface Components

Lightning Web Components (LWC)VisualforceFlow for User Interface
  • Given a scenario, display and use custom user interface components, including Lightning components, Flow, and Visualforce.
  • Describe the use cases and best practices for Lightning Web Components, including the framework, benefits, and events.

Apex with Page Components and Agentforce

Apex Integration with UI Components

Given a scenario, implement Apex to work with various types of page components, including Lightning components, Flow, and Agentforce.

4

Testing, Debugging, and Deployment

20%

Writing and Executing Tests

Apex Testing FundamentalsTest Data SourcesTesting Flows

Write and execute tests for triggers, controllers, classes, and flows using various sources of test data.

Developer Tools

Salesforce DX and CLIDeveloper Console

Given a scenario, know how and when to use the Salesforce Developer tools such as Salesforce DX, Salesforce CLI, and Developer Console.

Debugging and Monitoring

Debugging ApproachesMonitoring Jobs

Describe how to approach debugging system issues and monitoring flows, performance, asynchronous, and batch jobs.

Deployment

Deployment Process and ToolsEnvironments

Describe the environments, requirements, and process for deploying code and associated configurations.

How do I earn this certification?

Passing PLAT-DEV-201 earns the Salesforce Certified Platform Developer I certification. It sits in the Developer track.

Alternative Paths

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How to study for this exam?

The most effective way to prepare for PLAT-DEV-201 is by using the PlanetCert Simulator to practice questions and review detailed explanations.

What's changed on this exam?

Current Status
  • ACTIVE
  • Last content update: 2025 (Agentforce content added)
Updates
  • Agentforce Current New exam objective added under Developer Fundamentals domain • Release date: 2024
  • Lightning Web Components Current Primary UI framework tested; emphasis continues to grow over Aura • Release date: Ongoing updates each release
  • Flow Builder Current Critical for declarative automation questions and understanding when code is vs. is not needed • Release date: Ongoing updates each release

Who should take this exam?

  • Experience developing and deploying basic business logic and user interfaces on the Lightning Platform
  • Understanding of the programmatic capabilities of the Lightning Platform
  • Knowledge of Apex, Visualforce, and Lightning Web Components
  • Build Applications Programmatically on the Salesforce Platform (DEX450) course

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