AWS API Gateway Scenario based questions ❓

❓ Your application uses API Gateway to trigger Lambda functions. You want to enable logging for all requests and responses. How do you achieve this?

Answer: Enable CloudWatch Logs for the API Gateway stage.

By enabling CloudWatch Logs for the stage, you can log all requests and responses handled by API Gateway.

❓You need to allow only authenticated users to access certain API Gateway methods. What should you use?

Answer: Use Cognito User Pools or Lambda authorizers.

Cognito User Pools and Lambda authorizers can authenticate users and control access to API Gateway methods.

❓You want to limit the number of requests to your API to 1,000 requests per second. How can you achieve this?

Answer: Configure usage plans and API keys.

Usage plans and API keys can be used to throttle requests and enforce rate limits.

❓Your API needs to handle CORS (Cross-Origin Resource Sharing) requests. What should you configure in API Gateway?

Answer: Add CORS headers in the method response and enable CORS in the API Gateway console.

Configuring CORS headers in the method response and enabling CORS in the API Gateway console allows handling of CORS requests.

❓You need to pass data from an API request to a backend Lambda function. What should you configure?

Answer: Configure mapping templates in the Integration Request section.

Mapping templates can transform and pass data from the API request to the backend Lambda function.

❓Your API Gateway needs to integrate with a private VPC endpoint. What type of API Gateway endpoint should you use?

Answer: Use a Private API endpoint.

Private API endpoints can securely integrate with VPC endpoints.

❓You need to validate the structure of incoming JSON payloads to your API. What feature should you use?

Answer: Use request validation with JSON schema models.

Request validation with JSON schema models can validate the structure of incoming JSON payloads.

❓Your API Gateway needs to integrate with an AWS service such as S3. What integration type should you use?

Answer: Use AWS service integration.

AWS service integration allows API Gateway to directly interact with AWS services like S3.

❓You want to transform the response from a Lambda function before sending it back to the client. What should you use?

Answer: Configure mapping templates in the Integration Response section.

Mapping templates in the Integration Response section can transform the response before sending it back to the client.

❓ You want to secure your API with an SSL certificate for a custom domain. What service should you use?

Answer: Use AWS Certificate Manager (ACM).

AWS Certificate Manager can provision and manage SSL/TLS certificates for securing custom domain names.

❓You need to monitor the latency of API Gateway requests. What tool should you use?

Answer: Use CloudWatch metrics.

CloudWatch metrics provide detailed monitoring of API Gateway request latency and other metrics.

❓You need to roll out a new version of your API without disrupting the existing version. What feature should you use?

Answer: Create a new deployment stage.

Creating a new deployment stage allows you to deploy and test a new version of the API without disrupting the existing version.

❓Question: Your API Gateway is experiencing high latency due to backend processing delays. How can you improve performance?

Answer: Use AWS Lambda with provisioned concurrency.

AWS Lambda with provisioned concurrency can reduce cold start latency and improve performance.

❓You want to create a public API that is accessible from anywhere on the internet. What type of API Gateway endpoint should you use?

Answer: Use an Edge-Optimized API endpoint.

Edge-Optimized API endpoints are designed for public APIs accessible from anywhere on the internet.

❓ You need to handle binary data in your API Gateway. What should you configure?

Answer: Enable binary support and specify the binary media types.

Enabling binary support and specifying binary media types allows API Gateway to handle binary data.

❓You want to set up a custom domain name for your API Gateway. What steps should you take?

Answer: Provision an SSL certificate using ACM and configure the custom domain name in API Gateway.

Provisioning an SSL certificate with ACM and configuring the custom domain name in API Gateway sets up the custom domain.

❓You need to route requests to different Lambda functions based on the HTTP method. What should you configure?

Answer: Define different integration requests for each HTTP method.

Defining different integration requests for each HTTP method allows routing to different Lambda functions.

❓Your API Gateway needs to return a custom error message when the backend Lambda function fails. What should you configure?

Answer: Configure a custom error mapping template in the Integration Response section.

Custom error mapping templates in the Integration Response section can return custom error messages.

❓You want to capture detailed request and response data for debugging purposes. What should you enable?

Answer: Enable full request and response logging in CloudWatch Logs.

Enabling full request and response logging in CloudWatch Logs captures detailed data for debugging.

❓You need to cache responses from your API Gateway to reduce backend load. What feature should you use?

Answer: Enable API Gateway caching.

Enabling API Gateway caching stores responses and reduces backend load by serving cached responses.

❓You want to restrict access to your API based on IP address ranges. What feature should you use?

Answer: Use resource policies with IP address conditions.

Resource policies with IP address conditions can restrict access based on IP address ranges.

❓You need to simulate the behaviour of your API Gateway without actually invoking the backend. What feature should you use?

Answer: Use Mock integration.

Mock integration allows you to simulate API behaviour without invoking the backend.

❓Your API Gateway needs to integrate with multiple downstream services. What integration pattern should you use?

Answer: Use a Lambda function to orchestrate calls to multiple downstream services.

A Lambda function can orchestrate calls to multiple downstream services, acting as an intermediary.

❓You need to capture custom metrics from your API Gateway. What should you use?

Answer: Use CloudWatch custom metrics.

CloudWatch custom metrics allow capturing and monitoring custom metrics from API Gateway.

❓You want to provide different levels of access to your API for different user groups. What feature should you use?

Answer: Use API Gateway usage plans and API keys.

Usage plans and API keys allow defining different levels of access and rate limits for different user groups.

🥷Enjoy your Learning and Please comment if you feel — any other similar questions we can add to this page..!

Thank you much for reading📍

“ Yours Love ( @lisireddy across all the platforms )