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Salesforce is a cloud-based software company that provides customer relationship management (CRM) solutions. One of the primary features of Salesforce is the ability to customize and extend its capabilities through programming. Salesforce offers a certification exam known as the DEX-450, which is designed for developers who want to demonstrate their expertise in programmatic development using Apex and Visualforce in Lightning Experience.

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Salesforce DEX-450 certification exam is designed for professionals who specialize in programmatic development using Apex and Visualforce in the Lightning Experience. DEX-450 exam is intended to validate a candidate's knowledge and skills in designing, developing, testing, and deploying custom business logic, interfaces, and integrations using these programming languages.

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/

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Salesforce DEX-450 Exam Syllabus Topics:

SectionWeightObjectives
Apex Fundamentals10%- 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 Primitives
  • 1. ID and sObject types
  • 2. Integer, Double, Long, String, Boolean types
  • 3. Date, Datetime, Time classes
Visualforce Pages8%- VF Standard Components
  • 1. ,
  • 2. Action methods and pageReference
  • 3. , ,
- VF Page Basics
  • 1. Controllers and controller extensions
  • 2. component structure
  • 3. Visualforce expressions
Asynchronous Apex10%- Batch Apex
  • 1. Database.Batchable interface
  • 2. Database.Stateful
  • 3. start(), execute(), and finish() methods
- Future Methods
  • 1. @future annotation
  • 2. AsyncRequestLimit exceeded handling
Apex Testing13%- Testing Best Practices
  • 1. Coverage requirements (75% for deployment)
  • 2. Using seeAllData=false for isolated tests
  • 3. Assert statement usage
- Test Classes
  • 1. Test.startTest() and Test.stopTest()
  • 2. @isTest annotation
  • 3. Test data creation methods
Apex Transaction Management10%- Transaction Control
  • 1. System.debug() usage
  • 2. Savepoint and rollback
  • 3. Database methods with allOrNone parameter
- Governor Limits
  • 1. DML statement limits
  • 2. CPU time and heap size limits
  • 3. SOQL query limits
Working with Data - SOQL and SOSL15%- SOQL (Salesforce Object Query Language)
  • 1. Query options (LIMIT, ORDER BY, WHERE)
  • 2. Relationship queries (parent-child, child-parent)
  • 3. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
  • 4. Basic SOQL queries
- SOSL (Salesforce Object Search Language)
  • 1. Returning sObjects from SOSL
  • 2. SOSL syntax and use cases
Apex Classes and Interfaces12%- Apex Interfaces
  • 1. When to use interfaces
  • 2. Interface definition and implementation
- Apex Classes
  • 1. Access modifiers (public, private, protected, global)
  • 2. Inheritance and virtual/abstract classes
  • 3. Class structure (attributes, methods, constructors)
Apex Triggers12%- 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

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