Why DynamoDB pairs with Lambda - Quick Recap

Recall & Review

beginner

What is AWS Lambda?

AWS Lambda is a service that runs your code in response to events and automatically manages the computing resources for you.

beginner

What is Amazon DynamoDB?

Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale.

beginner

Why do DynamoDB and Lambda work well together?

Because DynamoDB can trigger Lambda functions automatically when data changes, allowing you to run code in response to database events without managing servers.

intermediate

How does Lambda help with DynamoDB streams?

Lambda reads DynamoDB streams, which capture table activity, and runs your code to process these changes in real-time.

beginner

What is a real-life example of using DynamoDB with Lambda?

When a new order is added to DynamoDB, Lambda can automatically send a confirmation email or update inventory without you writing extra server code.

What triggers a Lambda function when using DynamoDB?

A Scheduled daily at midnight

B Manual server restart

C Changes in DynamoDB table via streams

D User login to AWS console

Lambda functions can be triggered automatically by changes in DynamoDB tables through DynamoDB streams.

Which of these best describes DynamoDB?

A Relational database with fixed schema

B NoSQL database with fast, scalable performance

C File storage service

D Virtual machine service

DynamoDB is a NoSQL database designed for fast and scalable performance.

What is a key benefit of pairing Lambda with DynamoDB?

A You can run code automatically when data changes

B You must manage servers manually

C You need to write complex server setup scripts

D You get slower response times

Lambda lets you run code automatically in response to DynamoDB data changes without managing servers.

What is a DynamoDB stream?

A A type of database index

B A video streaming service

C A backup of the database

D A log of changes made to a DynamoDB table

DynamoDB streams capture a log of changes made to a table, which Lambda can process.

Which scenario shows how Lambda and DynamoDB work together?

A Lambda sends an email when a new item is added to DynamoDB

B Lambda stores files in DynamoDB

C DynamoDB runs Lambda code directly

D Lambda replaces DynamoDB as a database

Lambda can run code like sending emails automatically when DynamoDB data changes.

Explain why DynamoDB and Lambda are a good pair for building serverless applications.

Think about how events in the database can start code without manual steps.

Describe a simple use case where Lambda reacts to DynamoDB data changes.

Imagine an online store order confirmation process.