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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 24, 2026
  • Q & A: 202 Questions and Answers
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About Salesforce DEX-450 Exam Braindumps

How to Prepare for Salesforce DEX-450 Exam

Preparation Guide for Salesforce DEX-450 Exam

Introduction

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What is the duration, language, and format of Salesforce DEX-450 Exam

  • This exam is offered in only English.
  • There is a time limit of 120 minutes for the exam.
  • The type of questions is Multiple Choice and situation-based questions.
  • This exam consists of 85 questions
  • Certification Validity period : 3 years.
  • Passing score 80%

The validity of the Salesforce DEX-450 certification is three years.

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.

Difficulty in Writing of Salesforce DEX-450 Exam

As agile is observed in nearly all organizations, Salesforce DEX-450 is the most successful qualification candidates can get on their resume. Professionals have therefore been known to demonstrate concern. But this difficulty can be overcommed if practitioners study with DEX-450 exam dumps and test them with test engines, stays based on tests, can be an incredibly challenging qualification. However, with accurate focusing and proper planning content, candidates will clear the test. With the aid of these exam dumps and provided DEX-450 practice exams, aspirants get reasonable idea about the kind of questions they pose in actual certification. The Salesforce experts check RealExamFree DEX-450 exam dumps. Certification questions also include a test for practise and is an ideal forum for checking the information achieved.

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

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