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

DEX-450 Exam Questions
  • Exam Code: DEX-450
  • Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
  • Updated: Jul 28, 2026
  • Q & A: 202 Questions and Answers
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Best updated DEX-450 exam questions

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Introduction to Salesforce DEX-450 Exam

This qualification concentrates on the programmer's validation of abilities, such as the programming of programs. Salesforce DEX-450 certification acknowledges that the applicant has the potential to conform his / her Salesforce applications to the heart of the Pinnacle programming language and the visual power diagram. The credential offers a better indicator of the competences which you have established to provide prospective employers. Professionals need to gain functional expertise in constructing and programming data objects (sObjectiles) to retrieve, modify and store data from these objects. Specify custom logic with Apex triggers and classes and use the built-in testing system to test this logic. This Guide covers all facets of the DEX-450 Test, the salary of the accredited specialist Salesforce DEX-450 and all the aspects of the Salesforce DEX-450 certification.

The Salesforce DEX-450 exam is a competency qualification test that acknowledges your capability growth. You need industry expertise to attempt the test. Professionals should execute the following duties following certification:

  • Describe a range of the main features of multi-tenant programme architecture
  • Write Visualforce and code for user interface setup
  • Describe how the trigger code functions in the Save Execution Order
  • Write customizations of business logic using triggers and classes from Apex. SOQL and DML are used with these customizations.
  • Using a declarative GUI to build and change subjects
  • Develop programmatic implementations that benefit from declarative personalizations
  • Using the combined Apex and Visual Powers evaluation system.

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Salesforce DEX-450 exam is a challenging but rewarding certification exam for experienced Salesforce developers. By passing DEX-450 exam, developers can demonstrate their expertise in programmatic development and build custom applications using Apex and Visualforce in the Lightning Experience. With the increasing demand for Salesforce developers, passing the Salesforce DEX-450 exam can lead to exciting career opportunities and higher salaries.

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

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Salesforce DEX-450 exam demo

Salesforce DEX-450 is an exam that assesses the skills and knowledge of developers who are proficient in programmatic development using Apex and Visualforce in Lightning Experience. DEX-450 exam is designed to validate the ability of developers to design, develop, test, and deploy programmatic solutions that are efficient and scalable. DEX-450 exam is part of the Salesforce Certified Platform Developer II certification, which is intended for experienced developers who want to demonstrate their mastery in building custom applications on the Salesforce platform.

Salesforce DEX-450 Exam Syllabus Topics:

SectionObjectives
Security and Best Practices- Governor limits
  • 1. Avoiding limit exceptions
    - Security model
    • 1. Sharing rules and with sharing keyword
      • 2. CRUD and FLS enforcement
        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. Relationship queries
                • 2. Basic and advanced query filtering
                  - DML operations
                  • 1. Bulk operations and limits
                    • 2. Insert, update, delete, upsert
                      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
                              Apex Triggers and Automation- Trigger design patterns
                              • 1. Bulkified trigger design
                                • 2. Before and after triggers
                                  - Order of execution
                                  • 1. Salesforce transaction lifecycle
                                    Visualforce Development- Pages and controllers
                                    • 1. Custom controllers and extensions
                                      • 2. Standard controllers
                                        - UI components
                                        • 1. Visualforce components and expressions

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