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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 certification exam is designed for developers who want to demonstrate their knowledge and skills of programmatic development using Apex and Visualforce in Lightning Experience. Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) certification exam is intended for developers who have experience building custom applications on the Salesforce platform and are looking to validate their skills and knowledge to employers and peers. The Salesforce DEX-450 exam covers a broad range of topics including Apex development, Visualforce development, Lightning Component development, and integration with external systems.

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Salesforce DEX-450 is a certification exam designed for individuals who have the skills and knowledge of programmatic development using Apex and Visualforce in Lightning Experience. Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) certification exam is intended for individuals who have experience in developing custom applications on the Salesforce platform. Passing DEX-450J exam is a great way to demonstrate your expertise in programmatic development and showcase your ability to develop customized solutions for your clients.

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The DEX-450 exam covers various topics such as Apex programming concepts, Visualforce markup language, Lightning components, debugging and testing, and deployment. DEX-450J exam consists of 60 multiple-choice questions, and candidates are given 105 minutes to complete it. It is important to note that the DEX-450 exam is one of the prerequisites for the Salesforce Certified Platform Developer II certification. Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Exam (DEX-450日本語版) certification is highly valued in the industry, as it is a testament to the candidate's ability to design and develop complex applications on the Salesforce platform.

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

Salesforce DEX-450日本語 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: 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. Access modifiers (public, private, protected, global)
  • 3. Class structure (attributes, methods, constructors)
Topic 2: 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
Topic 3: 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
Topic 4: Asynchronous Apex10%- Future Methods
  • 1. @future annotation
  • 2. AsyncRequestLimit exceeded handling
- Batch Apex
  • 1. Database.Stateful
  • 2. start(), execute(), and finish() methods
  • 3. Database.Batchable interface
Topic 5: 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. Query options (LIMIT, ORDER BY, WHERE)
  • 2. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
  • 3. Basic SOQL queries
  • 4. Relationship queries (parent-child, child-parent)
Topic 6: Apex Fundamentals10%- Apex Basics
  • 1. Apex variables and data types
  • 2. DML operations (insert, update, delete, etc.)
  • 3. Using SOQL to query Salesforce data
  • 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. Action methods and pageReference
  • 2. , ,
  • 3. ,
- VF Page Basics
  • 1. Controllers and controller extensions
  • 2. component structure
  • 3. Visualforce expressions
Topic 8: Apex Transaction Management10%- Governor Limits
  • 1. SOQL query limits
  • 2. CPU time and heap size limits
  • 3. DML statement limits
- Transaction Control
  • 1. Savepoint and rollback
  • 2. Database methods with allOrNone parameter
  • 3. System.debug() usage

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