Tutorials Cloud Computing Tutorial
Serverless Computing — Complete Guide
Serverless Computing — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of Cloud Computing Tutorial on Toolliyo Academy.
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Cloud Computing Tutorial · Lesson 51 of 100
Serverless Computing
Foundations ✓ → Platform ✓ → Ops → Projects
Ops · 3 — DevOps, security, scale · ~6 min · Cloud — Serverless & DevOps
What is this?
Serverless runs your code on demand without you managing servers — billing per invocation and duration.
Why should you care?
CloudVerse payment webhooks spike unpredictably; serverless scales to zero between bursts.
See it live — copy this example
Use AWS/Azure/GCP free tier or local Docker/Kind. Sketches and YAML are meant to be typed and adapted.
# Azure Functions host.json (CloudVerse payments)
{
"version": "2.0",
"extensions": {
"http": { "routePrefix": "api" }
}
}
# func new --name ProcessPayment --template "HTTP trigger"What happened?
- You upload functions; the platform handles OS, patching, and scale.
- Cold starts and timeouts are your design constraints.
Practice next
- Pick one HTTP trigger function.
- Deploy to a dev slot.
- Load-test 50 concurrent calls.
- Add a queue trigger instead of HTTP.
- Set max concurrent instances in host config.
Remember
No servers to patch. Pay per use. Design for short, stateless handlers.
CloudVerse webhook handler
Bank partner sends payment callbacks only on settlement days.
Outcome: Function scales from zero; no idle VM cost.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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