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Serverless Architecture and AWS Lambda 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.

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  1. Which AWS service is most commonly used to expose Lambda functions as RESTful HTTP endpoints?

    Answer: Amazon API Gateway

    Amazon API Gateway is a fully managed service for creating, deploying, and managing REST, HTTP, and WebSocket APIs that can invoke Lambda functions.

  2. What is the primary purpose of AWS Step Functions in a serverless architecture?

    Answer: Orchestrating multiple Lambda functions and AWS services into visual workflows

    AWS Step Functions orchestrates multiple Lambda functions and AWS services into coordinated workflows using state machines.

  3. Which Amazon DynamoDB feature automatically deletes table items after a developer-defined expiration timestamp?

    Answer: DynamoDB Time to Live (TTL)

    DynamoDB TTL lets you set a per-item expiration attribute; DynamoDB automatically deletes expired items within 48 hours at no extra cost.

  4. In Amazon API Gateway, what does a 'stage' represent?

    Answer: A named snapshot of a deployment used to separate environments such as dev, test, and prod

    An API Gateway stage is a named reference to a deployment, enabling separate configurations and URLs for different environments like development and production.

  5. Which AWS service provides a fully managed serverless GraphQL API?

    Answer: AWS AppSync

    AWS AppSync is a fully managed GraphQL service that connects to data sources like DynamoDB and Lambda and supports real-time subscriptions.

  6. What is the purpose of Lambda Destinations for asynchronous invocations?

    Answer: To automatically route the result of an async invocation to another AWS service on success or failure

    Lambda Destinations send the result of an asynchronous function invocation to a target like SQS, SNS, EventBridge, or another Lambda based on success or failure outcome.

  7. Which AWS service acts as a central serverless event bus for routing events between AWS services, custom applications, and SaaS providers?

    Answer: Amazon EventBridge

    Amazon EventBridge is a serverless event bus that routes events from AWS services, custom apps, and SaaS partners to targets like Lambda based on rules.

Serverless Architecture and AWS Lambda Flashcards — AWS Study Cards with Answers