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Serverless Computing Flashcards

7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Serverless Computing flashcards as text

  1. What is the maximum execution timeout for an AWS Lambda function?

    Answer: 15 minutes

    AWS Lambda functions have a maximum execution timeout of 15 minutes (900 seconds); any function needing longer must be redesigned or use Step Functions.

  2. Which Lambda invocation type causes the function to execute synchronously and return the response to the caller?

    Answer: RequestResponse

    The RequestResponse invocation type executes Lambda synchronously and returns the function's response directly to the caller.

  3. What is the default memory allocation for a newly created AWS Lambda function?

    Answer: 128 MB

    The default memory allocation for a new Lambda function is 128 MB; it can be configured up to 10,240 MB.

  4. Which AWS service triggers Lambda functions on a defined cron or rate schedule?

    Answer: Amazon EventBridge

    Amazon EventBridge (formerly CloudWatch Events) supports cron and rate expressions to invoke Lambda functions on a schedule.

  5. What is the maximum compressed deployment package size when uploading a Lambda function directly (not via S3)?

    Answer: 50 MB

    The maximum compressed ZIP size for a direct Lambda upload is 50 MB; packages up to 250 MB unzipped can be deployed via S3.

  6. Which Lambda feature pre-initializes a specified number of execution environments to eliminate cold start latency?

    Answer: Provisioned concurrency

    Provisioned concurrency initializes a set number of execution environments in advance so they respond immediately without cold start delays.

  7. What happens when a Lambda function exceeds its reserved concurrency limit?

    Answer: Invocations are throttled with a 429 TooManyRequests error

    When a Lambda function hits its reserved concurrency cap, additional invocations are throttled and the caller receives a 429 TooManyRequests error.