Function pricing (consumption vs premium) in Azure - Practice Questions

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding billing triggers in Consumption plan

Which event causes billing to start for an Azure Function running on the Consumption plan?

A When the function code is executed in response to an event

B When the function app is deployed to Azure

C When the function app is idle for more than 5 minutes

D When the function app is scaled to multiple instances

💡 Hint

Think about what triggers actual work and resource use.

In the Consumption plan, billing starts only when the function runs in response to an event, not when deployed or idle.

❓ Architecture

intermediate

Scaling behavior difference between Consumption and Premium plans

Which statement correctly describes the scaling behavior difference between Azure Functions Consumption and Premium plans?

A Consumption plan scales instantly with no cold starts; Premium plan has fixed instances

B Consumption plan scales automatically with possible cold starts; Premium plan pre-warms instances to avoid cold starts

C Both plans require manual scaling and have cold starts

D Premium plan scales only during business hours; Consumption plan scales 24/7

💡 Hint

Consider how each plan handles instance readiness.

The Consumption plan scales automatically but may have cold starts. The Premium plan pre-warms instances to reduce cold starts.

❓ security

advanced

Network isolation capabilities in Function plans

Which Azure Function pricing plan supports Virtual Network (VNet) integration for secure network isolation?

A Neither plan supports VNet integration

B Both Consumption and Premium plans

C Consumption plan only

D Premium plan only

💡 Hint

Think about which plan offers advanced networking features.

Only the Premium plan supports VNet integration for secure network isolation.

✅ Best Practice

advanced

Choosing the right plan for predictable workloads

You have an Azure Function with a steady, predictable workload that requires no cold starts and needs to run 24/7. Which plan is best?

A Premium plan, because it pre-warms instances and supports always-on

B Consumption plan, because it is cost-effective for steady workloads

C Consumption plan, because it automatically scales to zero when idle

D Premium plan, because it charges only when functions run

💡 Hint

Consider the need for no cold starts and always-on availability.

The Premium plan supports pre-warmed instances and always-on, making it ideal for steady workloads without cold starts.

❓ service_behavior

expert

Memory allocation and billing differences

How does memory allocation affect billing in Azure Functions Consumption vs Premium plans?

A Both plans bill only per execution count, memory is not billed separately

B Consumption plan bills per GB-second with fixed 1.5 GB memory; Premium plan bills per instance regardless of memory

C Consumption plan bills per GB-second based on allocated memory; Premium plan allows custom memory sizes and bills per vCPU and memory allocated

D Premium plan bills per GB-second; Consumption plan bills per vCPU usage

💡 Hint

Think about how memory customization affects billing in each plan.

Consumption plan bills per GB-second based on allocated memory (default 1.5 GB). Premium plan allows custom memory and bills per vCPU and memory allocated.