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

DEX-450 real exams

Exam Code: DEX-450

Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience

Updated: Aug 20, 2026

Q & A: 202 Questions and Answers

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

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Who should take the Salesforce DEX-450 Exam

This course is designed for programme developers starting on the Salesforce platform who require programming customizations on Apex and Visualforce business logic as well as on user interface layers. There are no prerequisites for Salesforce DEX-450 Exam.

  • Programmatic developers.

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

How to Study the Salesforce DEX-450 Exam

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How much Salesforce DEX-450 Exam Cost

The price of the Salesforce DEX-450 certification is $375 USD, for more information related to the Salesforce DEX-450 Exam please visit Salesforce website.

Salesforce DEX-450 Exam Syllabus Topics:

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

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