AWS Lambda Sync vs Async Explained | How Lambda Actually Works (Real Examples)
In this video, we’ll deeply understand how AWS Lambda actually works by comparing synchronous and asynchronous execution.
Most people use Lambda without knowing when it runs synchronously, when it runs asynchronously, and why this difference matters in real-world systems.
In this session, you’ll learn:
What synchronous Lambda execution means (client waits)
What asynchronous Lambda execution means (fire & forget)
How retries work in async Lambda
Why async execution is critical for scalable systems
When API Gateway is a bad choice for long-running tasks
▶ This is a practical, demo-based explanation — not theory.
Next video:
AWS SQS + Lambda Retries & Failures
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