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

  • Exam Code: DEX-450
  • Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
  • Updated: Jul 30, 2026
  • Q&As: 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 Programming Fundamentals- Collections and data handling
  • 1. Lists, Sets, and Maps
    • 2. Iteration and data manipulation
      - Apex syntax and object-oriented concepts
      • 1. Access modifiers and encapsulation
        • 2. Classes, methods, and variables
          Topic 2: Database and SOQL/SOSL- DML operations
          • 1. Insert, update, delete, upsert
            • 2. Bulk operations and limits
              - SOQL queries
              • 1. Relationship queries
                • 2. Basic and advanced query filtering
                  Topic 3: Apex Triggers and Automation- Order of execution
                  • 1. Salesforce transaction lifecycle
                    - Trigger design patterns
                    • 1. Before and after triggers
                      • 2. Bulkified trigger design
                        Topic 4: Visualforce Development- Pages and controllers
                        • 1. Standard controllers
                          • 2. Custom controllers and extensions
                            - UI components
                            • 1. Visualforce components and expressions
                              Topic 5: Testing and Debugging- Debugging techniques
                              • 1. System debug logs
                                - Apex testing framework
                                • 1. Code coverage requirements
                                  • 2. Test classes and methods
                                    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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