Salesforce Platform Developer II Prep/proxy

I'm preparing for the Salesforce Platform Developer II certification and need expert guidance.

Key areas of focus:
- Advanced Apex Programming
- Data Integration
- Performance Tuning

Ideal candidates should have:
- Proven Salesforce Developer experience
- Strong expertise in Apex and data integration techniques
- Experience in optimizing performance for Salesforce applications

Looking for a structured study plan, hands-on practice, and expert insights to ace the exam.