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The DEX-450 exam is an essential certification for developers who want to demonstrate their expertise in programmatic development using Apex and Visualforce in Lightning Experience. This credential can help professionals advance their careers, build their reputation in the industry, and gain recognition as experts in Salesforce development.
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Salesforce DEX-450 certification exam consists of 60 multiple-choice questions that must be completed within 105 minutes. DEX-450 exam covers a range of topics, including Apex syntax and data types, Visualforce components and controllers, Lightning Component Framework, and Apex Triggers. DEX-450 exam also covers advanced topics such as Batch Apex, Apex Sharing and Security, and Apex Integration. To prepare for DEX-450 exam, developers can take the Salesforce DEX-450 course, which provides a comprehensive overview of the Salesforce platform and the skills needed to develop custom applications using Apex and Visualforce. Passing the Salesforce DEX-450 certification exam is an excellent way for developers to demonstrate their expertise in programmatic development using Apex and Visualforce in the Lightning Experience and to advance their careers in the Salesforce ecosystem.
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Salesforce DEX-450 exam covers a wide range of topics, including Apex classes and triggers, Visualforce pages and components, Lightning Components, data modeling, and testing. Candidates are expected to have a deep understanding of the Apex programming language and its syntax, as well as the Salesforce data model and how to work with it programmatically. They should also be proficient in using the Salesforce development tools, such as the Apex Data Loader and the Developer Console.
Salesforce DEX-450: Programmatic Development using Apex and Visualforce in Lightning Experience Exam is an exam that every Salesforce developer should consider taking. It validates their proficiency in developing custom applications using the latest Apex and Visualforce technologies, as well as leveraging the benefits offered by Salesforce Lightning Experience. DEX-450 exam is affordable, and it can be taken either online or in the testing center, making it accessible to anyone who wants to enhance their Salesforce development skills.
Reference: https://trailhead.salesforce.com/en/academy/classes/dex450-build-applications-programmatically-on-the-salesforce-platform/
Salesforce DEX-450 Exam Syllabus Topics:
| Section | Weight | Objectives |
| Asynchronous Apex | 10% | - Batch Apex
- 1. Database.Batchable interface
- 2. start(), execute(), and finish() methods
- 3. Database.Stateful
- Future Methods
- 1. @future annotation
- 2. AsyncRequestLimit exceeded handling
|
| Apex Fundamentals | 10% | - Apex Primitives
- 1. ID and sObject types
- 2. Date, Datetime, Time classes
- 3. Integer, Double, Long, String, Boolean types
- Apex Basics
- 1. Apex variables and data types
- 2. Apex operators and control flow statements
- 3. Using SOQL to query Salesforce data
- 4. DML operations (insert, update, delete, etc.)
|
| Apex Transaction Management | 10% | - Transaction Control
- 1. System.debug() usage
- 2. Savepoint and rollback
- 3. Database methods with allOrNone parameter
- Governor Limits
- 1. DML statement limits
- 2. SOQL query limits
- 3. CPU time and heap size limits
|
| Visualforce Pages | 8% | - VF Page Basics
- 1. component structure
- 2. Controllers and controller extensions
- 3. Visualforce expressions
- 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.newMap and Trigger.oldMap
- 3. Trigger.old and Trigger.new context variables
|
| 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. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
- 4. Query options (LIMIT, ORDER BY, WHERE)
|
| Apex Testing | 13% | - Testing Best Practices
- 1. Assert statement usage
- 2. Using seeAllData=false for isolated tests
- 3. Coverage requirements (75% for deployment)
- Test Classes
- 1. Test data creation methods
- 2. @isTest annotation
- 3. Test.startTest() and Test.stopTest()
|
| Apex Classes and Interfaces | 12% | - Apex Classes
- 1. Class structure (attributes, methods, constructors)
- 2. Inheritance and virtual/abstract classes
- 3. Access modifiers (public, private, protected, global)
- Apex Interfaces
- 1. Interface definition and implementation
- 2. When to use interfaces
|