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

DEX-450 actual test

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  • Exam Code: DEX-450
  • Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
  • Updated: Oct 11, 2026
  • Q & A: 202 Questions and Answers
  • Go To DEX-450 Questions
  • PDF Demo
  • PC Test Engine
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  • Total Price: $129.00 $59.99  

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How much Salesforce DEX-450 Exam Cost

The price of the Salesforce DEX-450 certification is $375 USD, for more information related to the Salesforce DEX-450 Exam please visit Salesforce website.

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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Salesforce DEX-450 Exam Syllabus Topics:

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

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