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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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Salesforce DEX-450 exam is a challenging but rewarding certification exam for experienced Salesforce developers. By passing DEX-450J exam, developers can demonstrate their expertise in programmatic development and build custom applications using Apex and Visualforce in the Lightning Experience. With the increasing demand for Salesforce developers, passing the Salesforce DEX-450 exam can lead to exciting career opportunities and higher salaries.

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The DEX-450 exam is intended for developers who are involved in the design, development, and implementation of custom solutions, as well as those who are responsible for maintaining and enhancing existing applications. DEX-450J exam is suitable for professionals who have a solid background in software development, as well as those who are familiar with the Salesforce platform and its architecture.

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

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Salesforce DEX-450日本語 Exam Syllabus Topics:

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

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