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

  • Exam Code: DEX-450
  • Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
  • Updated: Oct 07, 2026
  • Q & A: 202 Questions and Answers

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

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How to Prepare for Salesforce DEX-450 Exam

Preparation Guide for Salesforce DEX-450 Exam

Introduction

Salesforce is a solution for managing customer relationships that unite customers and companies. This is an interactive CRM platform that provides a single, shared view of every client in all the divisions including marketing, distribution, exchange, and operation. Provide the clients with the individual experience Salesforce demand 360 product via the Integrated CRM Platform. It delivers solid and related goods to boost marketing, revenue, exchange, operation, IT, and more. Salesforce is a digital cloud computing (SaaS) firm specializing in the management of client relationships (CRMs). There was a mistake. The app is now the number one of consumer satisfaction and allows organizations to track customer behavior, advertise to consumers, and more. Salesforce is common because it is bundled with features such as contact management, workflow development, task management, incentive monitoring, teamwork tools, customer experience tools, analytics, and interactive, smartphone dashboard.

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

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