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Serverless Architecture Essentials Flashcards
| Front | Back |
| Describe the best practice for error handling in Lambda functions. | Implement retries, use Dead Letter Queues (DLQs), and handle exceptions gracefully within the code. |
| Describe the pricing model for AWS Lambda. | You are charged based on the number of requests and the duration of code execution, measured in milliseconds. |
| Describe the use of environment variables in Lambda functions. | They allow you to pass configuration settings to functions without hardcoding them, enabling flexibility and security. |
| Explain the integration between Lambda and DynamoDB. | Lambda functions can be triggered by DynamoDB streams to respond to data modifications in real-time. |
| Explain the Serverless Design Pattern "API Composition" | Combining multiple backend services into a single API endpoint using API Gateway and Lambda. |
| How can you scale serverless applications on AWS? | By leveraging the automatic scaling capabilities of services like Lambda, API Gateway, and DynamoDB without managing infrastructure. |
| How do Step Functions manage state in workflows? | They maintain the state of each step, ensuring the workflow progresses correctly through each task. |
| How does API Gateway handle authorization? | It integrates with AWS IAM, Cognito, and custom authorizers to secure API endpoints. |
| What are AWS Step Functions? | A serverless orchestration service that allows you to sequence AWS Lambda functions and other AWS services into workflows. |
| What are the benefits of using microservices in a serverless architecture? | Improved scalability, flexibility, independent deployments, and better fault isolation. |
| What is a cold start in AWS Lambda? | The latency that occurs when a Lambda function is invoked for the first time or after being idle, due to initialization. |
| What is Amazon API Gateway? | A fully managed service that enables developers to create, publish, maintain, monitor, and secure APIs. |
| What is an API Gateway Proxy Integration? | A setup where API Gateway passes the entire request to a Lambda function and uses the function's response directly. |
| What is AWS Lambda? | A serverless compute service that runs code in response to events. |
| What is the difference between synchronous and asynchronous Lambda invocations? | Synchronous invocations wait for the function to process and return a response, while asynchronous invocations proceed without waiting for a response. |
| What is the event-driven architecture in serverless? | A design paradigm where services communicate through events, triggering functions in response to changes or actions. |
| What is the importance of idempotency in serverless functions? | Ensures that multiple identical requests have the same effect as a single request, preventing unintended side effects. |
| What is the purpose of AWS SAM (Serverless Application Model)? | A framework for building serverless applications by defining serverless resources in a simplified syntax. |
| What is the role of IAM in serverless architectures? | To manage access permissions and securely control access to AWS resources. |
| What is the use of Amazon CloudWatch in serverless applications? | To monitor, log, and set alarms for metrics related to serverless services like Lambda and API Gateway. |
Front
What is an API Gateway Proxy Integration?
Click the card to flip
Back
A setup where API Gateway passes the entire request to a Lambda function and uses the function's response directly.
Front
Explain the integration between Lambda and DynamoDB.
Back
Lambda functions can be triggered by DynamoDB streams to respond to data modifications in real-time.
Front
Explain the Serverless Design Pattern "API Composition"
Back
Combining multiple backend services into a single API endpoint using API Gateway and Lambda.
Front
What is the role of IAM in serverless architectures?
Back
To manage access permissions and securely control access to AWS resources.
Front
What is the difference between synchronous and asynchronous Lambda invocations?
Back
Synchronous invocations wait for the function to process and return a response, while asynchronous invocations proceed without waiting for a response.
Front
What is the event-driven architecture in serverless?
Back
A design paradigm where services communicate through events, triggering functions in response to changes or actions.
Front
What is AWS Lambda?
Back
A serverless compute service that runs code in response to events.
Front
What are AWS Step Functions?
Back
A serverless orchestration service that allows you to sequence AWS Lambda functions and other AWS services into workflows.
Front
What is the use of Amazon CloudWatch in serverless applications?
Back
To monitor, log, and set alarms for metrics related to serverless services like Lambda and API Gateway.
Front
How do Step Functions manage state in workflows?
Back
They maintain the state of each step, ensuring the workflow progresses correctly through each task.
Front
How does API Gateway handle authorization?
Back
It integrates with AWS IAM, Cognito, and custom authorizers to secure API endpoints.
Front
Describe the pricing model for AWS Lambda.
Back
You are charged based on the number of requests and the duration of code execution, measured in milliseconds.
Front
What is the importance of idempotency in serverless functions?
Back
Ensures that multiple identical requests have the same effect as a single request, preventing unintended side effects.
Front
What is Amazon API Gateway?
Back
A fully managed service that enables developers to create, publish, maintain, monitor, and secure APIs.
Front
Describe the use of environment variables in Lambda functions.
Back
They allow you to pass configuration settings to functions without hardcoding them, enabling flexibility and security.
Front
How can you scale serverless applications on AWS?
Back
By leveraging the automatic scaling capabilities of services like Lambda, API Gateway, and DynamoDB without managing infrastructure.
Front
What is the purpose of AWS SAM (Serverless Application Model)?
Back
A framework for building serverless applications by defining serverless resources in a simplified syntax.
Front
Describe the best practice for error handling in Lambda functions.
Back
Implement retries, use Dead Letter Queues (DLQs), and handle exceptions gracefully within the code.
Front
What is a cold start in AWS Lambda?
Back
The latency that occurs when a Lambda function is invoked for the first time or after being idle, due to initialization.
Front
What are the benefits of using microservices in a serverless architecture?
Back
Improved scalability, flexibility, independent deployments, and better fault isolation.
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This deck delves into AWS serverless technologies such as Lambda, API Gateway, and Step Functions, focusing on design patterns, integration, and best practices for building and scaling serverless applications.