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Exam Code: DEX-450
Exam Name: Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版)
Certification Provider: Salesforce
Corresponding Certification: Salesforce Developer

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DEX-450日本語

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Updated: Jul 28, 2026

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The DEX-450 certification exam consists of 60 multiple-choice questions that need to be completed within 105 minutes. To pass the exam, candidates need to score at least 65%. DEX-450J exam can be taken in-person at a testing center or remotely online.

Salesforce DEX-450日本語 Exam Overview:

Certification Vendor:Salesforce
Exam Name:Programmatic Development using Apex and Visualforce in Lightning Experience
Exam Number:DEX-450
Related Certifications:Platform Developer II (PDII)
Salesforce Certified Administrator
Available Languages:English
Certificate Validity Period:2 years (for certification)
Exam Format:Multiple Choice, Multiple Select
Passing Score:68%
Exam Price:$200 USD
Real Exam Qty:60
Exam Duration:120 minutes
Sample Questions:Salesforce DEX-450日本語 Sample Questions
Exam Way:In-person testing center or online proctored exam
Pre Condition:No formal prerequisites, but recommended: 1-2 years Apex development experience, completion of Salesforce Developer Beginner and Intermediate Trailhead modules
Official Syllabus URL:https://trailhead.salesforce.com/credentials/platform-developer-exam

To take the DEX-450 exam, candidates must have a deep understanding of the Apex programming language, Visualforce markup language, and Lightning Component Framework. They should also have experience in building and deploying custom applications on the Salesforce platform, as well as configuring and customizing the Salesforce environment to meet the specific needs of their organization or clients.

Reference: https://trailhead.salesforce.com/en/academy/classes/dex450-build-applications-programmatically-on-the-salesforce-platform/

Salesforce DEX-450 is a certification exam that is designed for Salesforce developers who want to validate their skills and knowledge in programmatic development using Apex and Visualforce in Lightning Experience. DEX-450J exam is intended for those who have experience in developing custom applications on the Salesforce platform.

How to book the Salesforce DEX-450 Exam

There are the following steps for registering the Salesforce DEX-450 exam:

Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method

Salesforce DEX-450日本語 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Apex Classes and Interfaces12%- Apex Classes
  • 1. Class structure (attributes, methods, constructors)
  • 2. Access modifiers (public, private, protected, global)
  • 3. Inheritance and virtual/abstract classes
- Apex Interfaces
  • 1. Interface definition and implementation
  • 2. When to use interfaces
Topic 2: 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. 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)
Topic 3: Apex Testing13%- Testing Best Practices
  • 1. Assert statement usage
  • 2. Using seeAllData=false for isolated tests
  • 3. Coverage requirements (75% for deployment)
- Test Classes
  • 1. Test.startTest() and Test.stopTest()
  • 2. @isTest annotation
  • 3. Test data creation methods
Topic 4: Asynchronous Apex10%- Batch Apex
  • 1. start(), execute(), and finish() methods
  • 2. Database.Stateful
  • 3. Database.Batchable interface
- Future Methods
  • 1. AsyncRequestLimit exceeded handling
  • 2. @future annotation
Topic 5: Apex Transaction Management10%- Transaction Control
  • 1. System.debug() usage
  • 2. Savepoint and rollback
  • 3. Database methods with allOrNone parameter
- Governor Limits
  • 1. CPU time and heap size limits
  • 2. DML statement limits
  • 3. SOQL query limits
Topic 6: 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. ID and sObject types
  • 2. Date, Datetime, Time classes
  • 3. Integer, Double, Long, String, Boolean types
Topic 7: Visualforce Pages8%- VF Standard Components
  • 1. ,
  • 2. Action methods and pageReference
  • 3. , ,
- VF Page Basics
  • 1. component structure
  • 2. Visualforce expressions
  • 3. Controllers and controller extensions
Topic 8: Apex Triggers12%- Trigger Syntax and Context Variables
  • 1. Trigger events (before insert, after insert, etc.)
  • 2. Trigger.newMap and Trigger.oldMap
  • 3. Trigger.old and Trigger.new context variables
- Trigger Best Practices
  • 1. Recursive trigger prevention
  • 2. One trigger per object pattern
  • 3. Handler class patterns

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