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Updated: Sep 05, 2026

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Salesforce DEX-450 exam is intended for developers who have experience working with the Salesforce platform and want to take their skills to the next level by learning programmatic development using Apex and Visualforce in the Lightning Experience. DEX-450J exam is ideal for developers who are responsible for customizing Salesforce applications, building custom components, and integrating Salesforce with other systems. Passing DEX-450J exam validates the candidate's ability to develop complex solutions using Apex and Visualforce, which are essential skills for any Salesforce developer. Furthermore, this certification can help individuals advance their careers by demonstrating their knowledge and expertise in the field of Salesforce development.

One of the key skills that the DEX-450 exam assesses is the ability to write Apex code to automate business processes and customize Salesforce functionality. This includes writing triggers, classes, and controllers, as well as using Apex to integrate with external systems. DEX-450J exam also tests candidates on their knowledge of Visualforce, which is used to create custom user interfaces and pages within Salesforce.

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

Salesforce DEX-450: Programmatic Development using Apex and Visualforce in Lightning Experience is a certification exam that is designed for developers who want to showcase their skills in programmatic development. DEX-450J exam is intended for individuals who have experience with Apex development and Visualforce pages in the Lightning Experience. It covers various topics related to programmatic development, such as Apex classes and triggers, Visualforce pages and components, and Lightning components, among others.

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
Exam Format:Course assessment (format varies by provider), Multiple choice questions (typical Salesforce training exams)
Related Certifications:Salesforce Platform Developer II
Salesforce Platform Developer I
Available Languages:English
Recommended Training:Salesforce Apex Developer Guide
Salesforce Visualforce Developer Guide
Exam Registration:Salesforce Trailhead Training
Sample Questions:Salesforce DEX-450日本語 Sample Questions
Exam Way:Instructor-led training assessment or course completion exam (varies by training provider)
Pre Condition:Basic understanding of object-oriented programming and database concepts is recommended. Prior Salesforce experience is helpful but not strictly required.
Official Syllabus URL:https://trailhead.salesforce.com

Salesforce DEX-450日本語 Exam Syllabus Topics:

SectionObjectives
Topic 1: Testing and Debugging- Debugging techniques
  • 1. System debug logs
    - Apex testing framework
    • 1. Test classes and methods
      • 2. Code coverage requirements
        Topic 2: Security and Best Practices- Security model
        • 1. Sharing rules and with sharing keyword
          • 2. CRUD and FLS enforcement
            - Governor limits
            • 1. Avoiding limit exceptions
              Topic 3: Apex Triggers and Automation- Trigger design patterns
              • 1. Bulkified trigger design
                • 2. Before and after triggers
                  - Order of execution
                  • 1. Salesforce transaction lifecycle
                    Topic 4: Visualforce Development- UI components
                    • 1. Visualforce components and expressions
                      - Pages and controllers
                      • 1. Custom controllers and extensions
                        • 2. Standard controllers
                          Topic 5: Database and SOQL/SOSL- DML operations
                          • 1. Insert, update, delete, upsert
                            • 2. Bulk operations and limits
                              - SOQL queries
                              • 1. Relationship queries
                                • 2. Basic and advanced query filtering
                                  Topic 6: Apex Programming Fundamentals- Collections and data handling
                                  • 1. Lists, Sets, and Maps
                                    • 2. Iteration and data manipulation
                                      - Apex syntax and object-oriented concepts
                                      • 1. Access modifiers and encapsulation
                                        • 2. Classes, methods, and variables

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