Learn Apex - 10 Code Examples & CST Typing Practice Test
Apex is a strongly typed, object-oriented programming language developed by Salesforce for building scalable, secure, and automated applications on the Salesforce platform. It allows developers to execute business logic on the server side, integrate external systems, and customize CRM workflows using a syntax similar to Java.
Learn APEX with Real Code Examples
Updated Nov 19, 2025
Installation Setup
Create Salesforce Developer Org
Install VS Code with Salesforce Extensions
Authorize org using Salesforce CLI
Set up SFDX project directory
Deploy sample Apex classes to org
Environment Setup
Install SFDX CLI
Set up VS Code Salesforce extensions
Connect to dev org
Create scratch org (optional)
Deploy and test sample classes
Config Files
sfdx-project.json
Apex class metadata files
Permission sets
Named credentials
Object metadata XML
Cli Commands
sfdx force:auth:web:login
sfdx force:source:push
sfdx force:apex:test:run
sfdx force:data:soql:query
sfdx force:source:deploy
Internationalization
Apex supports multi-language Salesforce orgs
Labels stored in Custom Labels
Supports UTF-8 strings
Locale-driven formats
Translatable UI via metadata
Accessibility
Developer Console & logs
Step-by-step debug logs
Trailhead courses
Unit testing framework
Salesforce documentation
Ui Styling
Apex does not handle UI directly
Used to supply data to LWC/Aura
Can generate responses for Visualforce
Handles backend logic
UI styling done via LWC/HTML/CSS
State Management
Records stored as SObjects
Static variables for cross-transaction state
Trigger context provides transaction metadata
Platform events store async state
Lists and maps store runtime collections
Data Management
Query via SOQL
Search via SOSL
CRUD via DML
Serialization/deserialization
Integration payload handling
Frequently Asked Questions about Apex
What is Apex?
Apex is a strongly typed, object-oriented programming language developed by Salesforce for building scalable, secure, and automated applications on the Salesforce platform. It allows developers to execute business logic on the server side, integrate external systems, and customize CRM workflows using a syntax similar to Java.
What are the primary use cases for Apex?
Salesforce triggers & automation. Custom REST & SOAP APIs. Batch & scheduled jobs. Complex CRM business logic. Integrations with external systems. Custom Salesforce Apps & packages
What are the strengths of Apex?
Native integration with Salesforce objects. Secure, scalable execution. Excellent tooling and test framework. Great for enterprise automation. Powerful asynchronous capabilities
What are the limitations of Apex?
Vendor lock-in to Salesforce ecosystem. Strict governor limits. Cannot interact with system file I/O. Restricted multithreading. Must follow Salesforce deployment rules
How can I practice Apex typing speed?
CodeSpeedTest offers 10+ real Apex code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.