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

DEX-450 Exam Simulator
  • Exam Code: DEX-450
  • Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
  • Updated: Aug 21, 2026
  • Q & A: 202 Questions and Answers

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About Salesforce DEX-450 Exam Braindumps

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The DEX-450 qualification from Salesforce enhances your expertising and expertise to apply an agile perspective within a system of corporate research. At the interview DEX-450 examiners pick a corner over other comrades. In the labour market, aspirants are more competitive.

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

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