Salesforce DEX-450 Q&A - in .pdf

Exam Code: DEX-450
Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
Updated: Sep 09, 2026
Q & A: 202 Questions and Answers
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Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
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Updated: Sep 09, 2026
Q & A: 202 Questions and Answers
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Exam Code: DEX-450
Exam Name: Programmatic Development using Apex and Visualforce in Lightning Experience
Updated: Sep 09, 2026
Q & A: 202 Questions and Answers
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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:

Section	Weight	Objectives
Apex Classes and Interfaces	12%	- Apex Interfaces 1. When to use interfaces 2. Interface definition and implementation - Apex Classes 1. Inheritance and virtual/abstract classes 2. Access modifiers (public, private, protected, global) 3. Class structure (attributes, methods, constructors)
Apex Transaction Management	10%	- Governor Limits 1. DML statement limits 2. CPU time and heap size limits 3. SOQL query limits - Transaction Control 1. Savepoint and rollback 2. Database methods with allOrNone parameter 3. System.debug() usage
Asynchronous Apex	10%	- Future Methods 1. AsyncRequestLimit exceeded handling 2. @future annotation - Batch Apex 1. start(), execute(), and finish() methods 2. Database.Stateful 3. Database.Batchable interface
Apex Testing	13%	- Test Classes 1. @isTest annotation 2. Test.startTest() and Test.stopTest() 3. Test data creation methods - Testing Best Practices 1. Assert statement usage 2. Coverage requirements (75% for deployment) 3. Using seeAllData=false for isolated tests
Apex Triggers	12%	- Trigger Best Practices 1. Recursive trigger prevention 2. One trigger per object pattern 3. Handler class patterns - Trigger Syntax and Context Variables 1. Trigger.old and Trigger.new context variables 2. Trigger.newMap and Trigger.oldMap 3. Trigger events (before insert, after insert, etc.)
Working with Data - SOQL and SOSL	15%	- SOQL (Salesforce Object Query Language) 1. Basic SOQL queries 2. Query options (LIMIT, ORDER BY, WHERE) 3. Relationship queries (parent-child, child-parent) 4. Aggregate functions (COUNT, SUM, AVG, MIN, MAX) - SOSL (Salesforce Object Search Language) 1. Returning sObjects from SOSL 2. SOSL syntax and use cases
Apex Fundamentals	10%	- Apex Basics 1. DML operations (insert, update, delete, etc.) 2. Apex variables and data types 3. Using SOQL to query Salesforce data 4. Apex operators and control flow statements - Apex Primitives 1. Date, Datetime, Time classes 2. Integer, Double, Long, String, Boolean types 3. ID and sObject types
Visualforce Pages	8%	- VF Page Basics 1. Visualforce expressions 2. component structure 3. Controllers and controller extensions - VF Standard Components 1. , , 2. Action methods and pageReference 3. ,

Salesforce DEX-450 Q&A - in .pdf

Salesforce DEX-450 Value Pack
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