Function execution model in Azure - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the basic idea of the Azure Function execution model?

Azure Functions run small pieces of code in response to events without managing servers. The platform automatically handles scaling and execution.

beginner

How does Azure Functions handle scaling when many events occur?

Azure Functions automatically creates more instances of the function to handle increased events, scaling out to meet demand.

beginner

What triggers can start an Azure Function execution?

Triggers include HTTP requests, timers, messages in queues, changes in storage, and events from other Azure services.

intermediate

What happens if an Azure Function fails during execution?

Azure Functions can retry automatically based on configuration, and failures can be logged for troubleshooting.

intermediate

Explain the difference between Consumption Plan and Premium Plan in Azure Functions execution.

Consumption Plan runs functions on demand with automatic scaling and billing per execution. Premium Plan provides pre-warmed instances for faster start and supports more powerful hardware.

What automatically triggers an Azure Function?

A An event like an HTTP request or timer

B Manual server restart

C User login to Azure portal

D Scheduled OS updates

Azure Functions start automatically when an event such as an HTTP request or timer occurs.

How does Azure Functions scale when demand increases?

A It limits requests to one instance

B It queues requests until manual scaling

C It requires user to add servers

D It creates more function instances automatically

Azure Functions automatically scale out by creating more instances to handle increased events.

Which plan charges you only when your function runs?

A Premium Plan

B Consumption Plan

C Dedicated Plan

D Enterprise Plan

The Consumption Plan bills based on actual function executions, charging only when functions run.

What is a common trigger for Azure Functions?

A HTTP request

B Manual code deployment

C Azure portal login

D Database backup

HTTP requests are a common trigger that starts Azure Functions.

What happens if an Azure Function fails during execution?

A It deletes all data

B It shuts down the entire service

C It can retry automatically based on settings

D It requires manual restart every time

Azure Functions can be configured to retry automatically on failure to improve reliability.

Describe how Azure Functions execute code in response to events and how scaling works.

Think about how a waiter serves more tables when the restaurant gets busy.

Explain the difference between the Consumption Plan and Premium Plan for Azure Functions.

Consider paying for a taxi only when you ride versus renting a car all day.