Salesforce DEX-450 certification is an excellent way to demonstrate your expertise in programmatic development using Apex and Visualforce in the Lightning Experience. It is a valuable certification for developers who want to advance their careers in Salesforce development and stand out in the competitive job market.
Reference: https://trailhead.salesforce.com/en/academy/classes/dex450-build-applications-programmatically-on-the-salesforce-platform/
Salesforce DEX-450 exam is a challenging but rewarding certification for developers looking to take their skills to the next level. With a strong understanding of Apex, Visualforce, and Lightning Experience development, candidates can demonstrate their expertise and advance their careers in the Salesforce ecosystem.
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Salesforce DEX-450 exam is a comprehensive certification that covers a wide range of programmatic development skills. It is ideal for developers who want to demonstrate their expertise in building custom applications and integrations on the Salesforce platform using Apex, Visualforce, and Lightning Components. Passing DEX-450J exam is a great way to showcase your skills and advance your career as a Salesforce developer.
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Salesforce DEX-450日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
| Asynchronous Apex | 10% | - Batch Apex
- 1. start(), execute(), and finish() methods
- 2. Database.Batchable interface
- 3. Database.Stateful
- Future Methods
- 1. @future annotation
- 2. AsyncRequestLimit exceeded handling
|
| Apex Testing | 13% | - Testing Best Practices
- 1. Coverage requirements (75% for deployment)
- 2. Assert statement usage
- 3. Using seeAllData=false for isolated tests
- Test Classes
- 1. @isTest annotation
- 2. Test.startTest() and Test.stopTest()
- 3. Test data creation methods
|
| Apex Transaction Management | 10% | - Transaction Control
- 1. Database methods with allOrNone parameter
- 2. System.debug() usage
- 3. Savepoint and rollback
- Governor Limits
- 1. SOQL query limits
- 2. CPU time and heap size limits
- 3. DML statement limits
|
| Visualforce Pages | 8% | - VF Page Basics
- 1. Controllers and controller extensions
- 2. Visualforce expressions
- 3. component structure
- VF Standard Components
- 1. ,
- 2. , ,
- 3. Action methods and pageReference
|
| Apex Triggers | 12% | - Trigger Best Practices
- 1. One trigger per object pattern
- 2. Handler class patterns
- 3. Recursive trigger prevention
- Trigger Syntax and Context Variables
- 1. Trigger events (before insert, after insert, etc.)
- 2. Trigger.old and Trigger.new context variables
- 3. Trigger.newMap and Trigger.oldMap
|
| Apex Classes and Interfaces | 12% | - Apex Classes
- 1. Inheritance and virtual/abstract classes
- 2. Access modifiers (public, private, protected, global)
- 3. Class structure (attributes, methods, constructors)
- Apex Interfaces
- 1. Interface definition and implementation
- 2. When to use interfaces
|
| Apex Fundamentals | 10% | - Apex Primitives
- 1. Integer, Double, Long, String, Boolean types
- 2. ID and sObject types
- 3. Date, Datetime, Time classes
- Apex Basics
- 1. DML operations (insert, update, delete, etc.)
- 2. Apex operators and control flow statements
- 3. Apex variables and data types
- 4. Using SOQL to query Salesforce data
|
| Working with Data - SOQL and SOSL | 15% | - 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. Relationship queries (parent-child, child-parent)
- 3. Query options (LIMIT, ORDER BY, WHERE)
- 4. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
|