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
Performance Notes
Bulkify all operations
Cache results in maps
Minimize SOQL/DML
Use Queueable for long jobs
Use selective queries
Security Notes
Use WITH SECURITY_ENFORCED in SOQL
Validate user permissions
Enforce CRUD/FLS
Avoid exposing sensitive data in APIs
Use Named Credentials for integrations
Monitoring Analytics
Debug logs
Setup -> Apex Exception Emails
Async job monitoring
Apex Replay Debugger
Event monitoring
Code Quality
Follow trigger-handler pattern
Avoid SOQL/DML inside loops
Use descriptive naming
Write tests for all logic
Use static analysis tools
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.