Difficulty: 5/10event-driven execution, cold start, scaling & concurrencyA lambda expression is a short, anonymous function segment that takes input and returns output. It supports functional programming by enabling concise codeScenario Questions0-2 years experience1How would you create a simple Lambda function that logs the incoming event and returns a success response?2If you set the timeout of a Lambda function to 3 seconds but the handler runs for 5 seconds, what happens during execution?2-5 years experience1We need to process image uploads from S3 using Lambda, but some invocations fail intermittently. How would you debug the issue and ensure reliable retries?2Why might a Lambda start timing out after we increased the payload size, and what changes could you make to fix it?5-8 years experience1Design a serverless pipeline that ingests up to 10,000 events per second using Lambda, SQS, and DynamoDB. What concurrency settings and architectural patterns would you use to handle burst traffic?2Our Java‑based Lambda invoked by API Gateway shows noticeable cold‑start latency for a global audience. How would you mitigate that latency?8+ years experience1Our team is migrating a monolithic order‑processing service to a Lambda‑based microservice architecture. What are the key considerations for cross‑team ownership, versioning, and operational monitoring?2Compare using Lambda with provisioned concurrency versus running the same workload in ECS containers for a latency‑sensitive, high‑throughput API. What trade‑offs would you highlight?Follow-up QuestionsWhat steps would you take to deploy and test that function?Which CloudWatch metrics would you monitor for health?How do you handle versioning and rollbacks for a Lambda?Suggest Improvement
