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Salesforce DEX-450

DEX-450

Exam Code: DEX-450

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

Updated: Sep 25, 2026

Q&A Number: 202 Q&As

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About Salesforce DEX-450 Exam Questions and Answers

For more info read reference:

Salesforce DEX-450 Certification leaning site Salesforce DEX-450 Certification resources

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

How to book the Salesforce DEX-450 Exam

There are the following steps for registering the Salesforce DEX-450 exam:

Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method

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Salesforce DEX-450 Exam Syllabus Topics:

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

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