A company is building a serverless application on AWS. The application uses Amazon API Gateway and AWS Lambda. The company wants to deploy the application to its development, test, and production envi

Question

Options

• AUse API Gateway stage variables and create Lambda aliases to reference environment-specific
• BUse Amazon Elastic Container Service (Amazon ECS) to deploy the application to the
• CDuplicate the code for each environment. Deploy the code to a separate API Gateway stage.
• DUse AWS Elastic Beanstalk to deploy the application to the environments.

• A
  77% (27)
• B
  9% (3)
• C
  3% (1)
• D
  11% (4)

Explanation

Option A is correct because API Gateway stage variables act like environment-specific configuration that can be passed to Lambda, and Lambda aliases (e.g., dev, test, prod) point to specific function versions - this lets you manage multiple environments with a single codebase and minimal additional infrastructure, which is the least-effort approach.

Option B is wrong because ECS uses containers, not serverless functions - it introduces significant operational overhead (task definitions, clusters, container images) that contradicts the serverless architecture already in place.

Option C is wrong because duplicating code across environments is the highest-effort option and creates maintenance nightmares - any bug fix must be applied to three separate codebases, violating the DRY principle and increasing development effort dramatically.

Option D is wrong because Elastic Beanstalk is designed for managing traditional server-based applications (EC2, load balancers), not serverless workloads - it adds unnecessary infrastructure complexity when the company has already chosen API Gateway + Lambda.

Memory tip: Think of it as "one function, many faces" - Lambda aliases give each environment its own named pointer to the right version, while API Gateway stage variables tell each stage which alias to call. If a question says "serverless + least effort + multiple environments," aliases and stage variables are almost always the answer.

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