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

DEX-450 real exams

Exam Code: DEX-450

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

Updated: Sep 15, 2026

Q & A: 202 Questions and Answers

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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:

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

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Salesforce DEX-450 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Referencing Custom Controllers and Controller Extensions
  • Use the sObject data type, the primitive data types, and basic control statements in Apex
Topic 2
  • Write a query that traverses a child-to-parent and parent-to-child relationship
  • Creating Roll-Up Summary Fields
Topic 3
  • Visualforce Development Considerations and Testing
  • Determine what data an Apex class can access
Topic 4
  • Process the result of a query in Apex
  • Understanding Record Types
  • Use trigger context variables
Topic 5
  • Describe how triggers fit into and can be impacted by the Order of Execution
  • Building a Data Model on the Salesforce Platform
Topic 6
  • Write a basic query using Salesforce’s query language, SOQL
  • Write Apex to invoke DML operations and handle DML errors
Topic 7
  • Describe practices for writing code that is easy to maintain and extend
  • Write triggers and classes that assume batches of data as input
Topic 8
  • Describe the memory lifecycle for static attributes
  • Use Platform Events for Immediate Error Logging
Topic 9
  • Describe common limit issues and security concerns
  • Launch a Visualforce page using a custom button
Topic 10
  • Describe strategies for Testing Visualforce controllers
  • Use SOQL to Query Parent-Child Relationships

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

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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.

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