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Salesforce DEX-450 certification exam covers a range of topics related to programmatic development using Apex and Visualforce in Lightning Experience. DEX-450J exam tests your knowledge of Apex classes, triggers, controllers, Visualforce pages, components, and more. Additionally, the exam covers advanced topics such as testing and debugging, security, and performance optimization. Passing DEX-450J exam requires a thorough understanding of these topics and the ability to apply them in real-world scenarios.

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

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The Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) certification exam has a total of 60 multiple-choice questions that need to be answered within 105 minutes. The passing score is 65%, which means that the candidate needs to answer at least 39 questions correctly. DEX-450J exam fee is $200, and it can be taken either online or in the testing center.

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Salesforce DEX-450日本語 Exam Syllabus Topics:

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