Salesforce DEX-450 exam : Programmatic Development using Apex and Visualforce in Lightning Experience

DEX-450 Exam Simulator
  • Exam Code: DEX-450
  • Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
  • Updated: Aug 17, 2026
  • Q & A: 202 Questions and Answers

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Reference: https://trailhead.salesforce.com/en/academy/classes/dex450-build-applications-programmatically-on-the-salesforce-platform/

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Salesforce DEX-450 Exam Syllabus Topics:

SectionObjectives
Topic 1: Apex Triggers and Automation- Trigger design patterns
  • 1. Bulkified trigger design
    • 2. Before and after triggers
      - Order of execution
      • 1. Salesforce transaction lifecycle
        Topic 2: Testing and Debugging- Debugging techniques
        • 1. System debug logs
          - Apex testing framework
          • 1. Test classes and methods
            • 2. Code coverage requirements
              Topic 3: Apex Programming Fundamentals- Apex syntax and object-oriented concepts
              • 1. Access modifiers and encapsulation
                • 2. Classes, methods, and variables
                  - Collections and data handling
                  • 1. Lists, Sets, and Maps
                    • 2. Iteration and data manipulation
                      Topic 4: Visualforce Development- UI components
                      • 1. Visualforce components and expressions
                        - Pages and controllers
                        • 1. Standard controllers
                          • 2. Custom controllers and extensions
                            Topic 5: Database and SOQL/SOSL- SOQL queries
                            • 1. Basic and advanced query filtering
                              • 2. Relationship queries
                                - DML operations
                                • 1. Bulk operations and limits
                                  • 2. Insert, update, delete, upsert
                                    Topic 6: Security and Best Practices- Governor limits
                                    • 1. Avoiding limit exceptions
                                      - Security model
                                      • 1. CRUD and FLS enforcement
                                        • 2. Sharing rules and with sharing keyword

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