Functions with Cosmos DB integration in Azure - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is an Azure Function?

An Azure Function is a small piece of code that runs in the cloud when triggered by an event, like a timer or a database change. It helps automate tasks without managing servers.

beginner

How does Azure Functions integrate with Cosmos DB?

Azure Functions can automatically run when data changes in Cosmos DB or can read/write data to Cosmos DB using bindings, making it easy to connect code with the database without extra setup.

intermediate

What is an input binding in Azure Functions for Cosmos DB?

An input binding lets the function read data from Cosmos DB automatically when it runs, so the code can use that data without writing database connection code.

intermediate

What is an output binding in Azure Functions for Cosmos DB?

An output binding lets the function write data to Cosmos DB automatically after it runs, so the code just sends data to the binding and Azure handles saving it.

intermediate

Why use Cosmos DB trigger in Azure Functions?

A Cosmos DB trigger runs your function automatically when data changes in a Cosmos DB container, like when a new item is added. This helps react to data changes instantly without polling.

What does an Azure Function with a Cosmos DB output binding do?

A Writes data to Cosmos DB automatically

B Reads data from Cosmos DB automatically

C Triggers when Cosmos DB data changes

D Manages Cosmos DB server settings

An output binding sends data from the function to Cosmos DB automatically.

Which Azure Function binding triggers the function when Cosmos DB data changes?

A Input binding

B Output binding

C Cosmos DB trigger

D Timer trigger

The Cosmos DB trigger runs the function when data changes in the database.

What is the main benefit of using bindings in Azure Functions with Cosmos DB?

A Automatic scaling of Cosmos DB

B No need to write database connection code

C Improved security for Cosmos DB

D Faster database queries

Bindings simplify code by handling database connections automatically.

Which of these is NOT a typical trigger for Azure Functions?

A Timer schedule

B Cosmos DB data change

C HTTP request

D Manual server restart

Manual server restart is not a trigger for Azure Functions.

If you want your function to process new documents added to Cosmos DB, which should you use?

A Cosmos DB trigger

B Cosmos DB input binding

C Cosmos DB output binding

D HTTP trigger

The Cosmos DB trigger runs the function when new documents are added.

Explain how Azure Functions can interact with Cosmos DB using bindings and triggers.

Think about how the function gets data and how it sends data back.

Describe a real-life scenario where using a Cosmos DB trigger in an Azure Function is helpful.

Imagine a store that wants to act right away when a customer places an order.