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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: Sep 08, 2026
  • Q & A: 202 Questions and Answers
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About Salesforce DEX-450 Exam Braindumps

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

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
  • 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
  • Write Visualforce and code for user interface setup
  • Using the combined Apex and Visual Powers evaluation system.

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:

SectionWeightObjectives
Topic 1: Visualforce Pages8%- VF Page Basics
  • 1. component structure
  • 2. Controllers and controller extensions
  • 3. Visualforce expressions
- VF Standard Components
  • 1. , ,
  • 2. ,
  • 3. Action methods and pageReference
Topic 2: Apex Classes and Interfaces12%- Apex Interfaces
  • 1. When to use interfaces
  • 2. Interface definition and implementation
- Apex Classes
  • 1. Access modifiers (public, private, protected, global)
  • 2. Inheritance and virtual/abstract classes
  • 3. Class structure (attributes, methods, constructors)
Topic 3: Apex Transaction Management10%- Transaction Control
  • 1. Savepoint and rollback
  • 2. Database methods with allOrNone parameter
  • 3. System.debug() usage
- Governor Limits
  • 1. DML statement limits
  • 2. SOQL query limits
  • 3. CPU time and heap size limits
Topic 4: Apex Triggers12%- Trigger Best Practices
  • 1. Handler class patterns
  • 2. Recursive trigger prevention
  • 3. One trigger per object pattern
- Trigger Syntax and Context Variables
  • 1. Trigger.newMap and Trigger.oldMap
  • 2. Trigger.old and Trigger.new context variables
  • 3. Trigger events (before insert, after insert, etc.)
Topic 5: Asynchronous Apex10%- Batch Apex
  • 1. Database.Stateful
  • 2. Database.Batchable interface
  • 3. start(), execute(), and finish() methods
- Future Methods
  • 1. AsyncRequestLimit exceeded handling
  • 2. @future annotation
Topic 6: Apex Testing13%- Testing Best Practices
  • 1. Using seeAllData=false for isolated tests
  • 2. Coverage requirements (75% for deployment)
  • 3. Assert statement usage
- Test Classes
  • 1. @isTest annotation
  • 2. Test data creation methods
  • 3. Test.startTest() and Test.stopTest()
Topic 7: Apex Fundamentals10%- Apex Primitives
  • 1. Integer, Double, Long, String, Boolean types
  • 2. ID and sObject types
  • 3. Date, Datetime, Time classes
- Apex Basics
  • 1. Using SOQL to query Salesforce data
  • 2. Apex operators and control flow statements
  • 3. Apex variables and data types
  • 4. DML operations (insert, update, delete, etc.)
Topic 8: Working with Data - SOQL and SOSL15%- SOSL (Salesforce Object Search Language)
  • 1. Returning sObjects from SOSL
  • 2. SOSL syntax and use cases
- SOQL (Salesforce Object Query Language)
  • 1. Query options (LIMIT, ORDER BY, WHERE)
  • 2. Relationship queries (parent-child, child-parent)
  • 3. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
  • 4. Basic SOQL queries

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