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Who should take the Salesforce DEX-450 Exam

This course is designed for programme developers starting on the Salesforce platform who require programming customizations on Apex and Visualforce business logic as well as on user interface layers. There are no prerequisites for Salesforce DEX-450 Exam.

  • Programmatic developers.

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

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Introduction to Salesforce DEX-450 Exam

This qualification concentrates on the programmer's validation of abilities, such as the programming of programs. Salesforce DEX-450 certification acknowledges that the applicant has the potential to conform his / her Salesforce applications to the heart of the Pinnacle programming language and the visual power diagram. The credential offers a better indicator of the competences which you have established to provide prospective employers. Professionals need to gain functional expertise in constructing and programming data objects (sObjectiles) to retrieve, modify and store data from these objects. Specify custom logic with Apex triggers and classes and use the built-in testing system to test this logic. This Guide covers all facets of the DEX-450 Test, the salary of the accredited specialist Salesforce DEX-450 and all the aspects of the Salesforce DEX-450 certification.

The Salesforce DEX-450 exam is a competency qualification test that acknowledges your capability growth. You need industry expertise to attempt the test. Professionals should execute the following duties following certification:

  • Describe how the trigger code functions in the Save Execution Order
  • Write customizations of business logic using triggers and classes from Apex. SOQL and DML are used with these customizations.
  • Using the combined Apex and Visual Powers evaluation system.
  • Write Visualforce and code for user interface setup
  • Describe a range of the main features of multi-tenant programme architecture
  • Using a declarative GUI to build and change subjects
  • Develop programmatic implementations that benefit from declarative personalizations

Salesforce DEX-450 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Asynchronous Apex10%- Batch Apex
  • 1. start(), execute(), and finish() methods
  • 2. Database.Stateful
  • 3. Database.Batchable interface
- Future Methods
  • 1. AsyncRequestLimit exceeded handling
  • 2. @future annotation
Topic 2: Apex Triggers12%- Trigger Syntax and Context Variables
  • 1. Trigger.old and Trigger.new context variables
  • 2. Trigger.newMap and Trigger.oldMap
  • 3. Trigger events (before insert, after insert, etc.)
- Trigger Best Practices
  • 1. Recursive trigger prevention
  • 2. Handler class patterns
  • 3. One trigger per object pattern
Topic 3: 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
Topic 4: Apex Fundamentals10%- Apex Basics
  • 1. Apex variables and data types
  • 2. Using SOQL to query Salesforce data
  • 3. DML operations (insert, update, delete, etc.)
  • 4. Apex operators and control flow statements
- Apex Primitives
  • 1. ID and sObject types
  • 2. Integer, Double, Long, String, Boolean types
  • 3. Date, Datetime, Time classes
Topic 5: Apex Classes and Interfaces12%- Apex Interfaces
  • 1. Interface definition and implementation
  • 2. When to use interfaces
- Apex Classes
  • 1. Access modifiers (public, private, protected, global)
  • 2. Class structure (attributes, methods, constructors)
  • 3. Inheritance and virtual/abstract classes
Topic 6: 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. Basic SOQL queries
  • 2. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
  • 3. Relationship queries (parent-child, child-parent)
  • 4. Query options (LIMIT, ORDER BY, WHERE)
Topic 7: Apex Transaction Management10%- Transaction Control
  • 1. System.debug() usage
  • 2. Database methods with allOrNone parameter
  • 3. Savepoint and rollback
- Governor Limits
  • 1. SOQL query limits
  • 2. CPU time and heap size limits
  • 3. DML statement limits
Topic 8: Apex Testing13%- Testing Best Practices
  • 1. Using seeAllData=false for isolated tests
  • 2. Assert statement usage
  • 3. Coverage requirements (75% for deployment)
- Test Classes
  • 1. Test data creation methods
  • 2. Test.startTest() and Test.stopTest()
  • 3. @isTest annotation

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