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Salesforce Developer DEX-450

DEX-450

Exam Code: DEX-450

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

Updated: Aug 06, 2026

Q&A Number: 202 Q&As

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DEX-450 exam dumps

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71 percent of bachelor's degree expert methodology and energetic methodology certified methodologists receive up to another 16 percent are recorded in the Salesforce annual analytical compensation survey. The certification from Salesforce DEX-450 strengthens your expertise as well as your know-how to ensure that your views are agile in a system of market research. The physical test applicants of the Salesforce DEX-450 certification perceive a fresh advantage on other comrades when being interviewed. In the project market, aspirants find themselves even more aggressive. Salesforce DEX-450 is understood worldwide so that certified aspirants, along with methods of organizational analysis, are simply more self-confident.

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/

Salesforce DEX-450 Exam Syllabus Topics:

SectionWeightObjectives
Apex Fundamentals10%- Apex Basics
  • 1. Using SOQL to query Salesforce data
  • 2. DML operations (insert, update, delete, etc.)
  • 3. Apex variables and data types
  • 4. Apex operators and control flow statements
- Apex Primitives
  • 1. Date, Datetime, Time classes
  • 2. ID and sObject types
  • 3. Integer, Double, Long, String, Boolean types
Apex Transaction Management10%- Governor Limits
  • 1. DML statement limits
  • 2. CPU time and heap size limits
  • 3. SOQL query limits
- Transaction Control
  • 1. Savepoint and rollback
  • 2. System.debug() usage
  • 3. Database methods with allOrNone parameter
Apex Triggers12%- 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.)
- Trigger Best Practices
  • 1. One trigger per object pattern
  • 2. Recursive trigger prevention
  • 3. Handler class patterns
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. 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)
Asynchronous Apex10%- Batch Apex
  • 1. Database.Stateful
  • 2. Database.Batchable interface
  • 3. start(), execute(), and finish() methods
- Future Methods
  • 1. @future annotation
  • 2. AsyncRequestLimit exceeded handling
Apex Testing13%- Test Classes
  • 1. @isTest annotation
  • 2. Test.startTest() and Test.stopTest()
  • 3. Test data creation methods
- Testing Best Practices
  • 1. Using seeAllData=false for isolated tests
  • 2. Assert statement usage
  • 3. Coverage requirements (75% for deployment)
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
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. ,

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