What is Serverless Computing? Exploring Azure Functions

Serverless computing lets you run code without provisioning or managing servers — the cloud provider automatically handles scaling, patching, and infrastructure, and you're typically billed only for the compute time you actually use.

Key Characteristics of Serverless Computing

• No server management — the cloud provider handles infrastructure entirely
• Automatic scaling based on incoming demand, up or down, including to zero
• Event-driven execution, where code runs in response to triggers
• Pay-per-execution pricing rather than paying for idle server time

How Azure Functions Implements Serverless Computing

Azure Functions is Azure's primary serverless compute offering. You write small, focused functions that run in response to triggers like HTTP requests, timers, or messages, and Azure automatically manages the underlying compute resources.

module.exports = async function (context, req) {
    context.res = { body: "Running serverlessly!" };
};

Benefits of Serverless Computing

• Lower operational overhead, since there's no infrastructure to maintain
• Cost efficiency for workloads with unpredictable or intermittent traffic
• Faster time-to-market, since developers can focus purely on application logic

When Serverless Might Not Be the Best Fit

• Long-running processes that exceed function execution time limits
• Workloads needing very low, consistent latency where cold starts are unacceptable
• Applications requiring fine-grained control over the underlying runtime environment