Developing Serverless Solutions 1

Which of these is NOT a true statement about API Gateway?

• API Gateway can proxy requests to Lambda
• API Gateway authorizers let you Limit access to AWS resources through API Gateway
• API Gateway invokes Lambda synchronously
• API Gateway retries failed calls to AWS resources 2 times by default

If a Lambda function is continually failing when processing batches of records off an SQS queue, which of these might a developer try to fix it?

• Increase the polling rate on the queue
• Decrease the concurrency on the function
• Increase the timeout on the function
• Decrease the visibility timeout on the queue

Which of these might you choose to trigger a different workflow for different customer types based on Auth0 sigh-in events?

• Use Auth0 as an event source for EventBridge and route results based on a rule
• Use Auth0 as an event source for an SNS topic and use attribute filters for subscribers
• Use Auth0 as an event source for a Step Functions flow that uses a choice task

Which of these is a best practice for serverless deployments?

• Select one deployment framework and use it for all of your deployments for consistency.
• Use different AWS accounts for each environment in your deployment pipeline.
• Create a specific SAM template to match each environment to keep them distinct.

You've been asked to decrease the cold start latency of a Lambda function. Which one of these might help?

• Decrease the reserved concurrency for the function.
• Increase the /TMP space configuration for the function
• Add provisioned concurrency

Which API Gatway API type provides the lowest latency?

• REST
• HTTP
• WebSockets
• GraphQL

Which of these is a true statement about observability?

• Observability focuses on three pillars: logs, metrics, and errors
• Observability is focused on identifying operational failures across the layers of your stack
• Observability extends to getting business information about your system

Which of these is FALSE?

• Lambda spins up concurrent ephemeral environments to scale with incoming requests
• Lambda will throttle concurrent requests if they reach the reserved concurrency set for the function
• Lambda’s concurrency in a Region is limited to the burst capacity of that Region