Lambda Question Explained
This worked AWS Cloud Fundamentals practice question tests Serverless. Try the answer first, then review why B is the best choice.
Short answer
The correct answer is B. AWS Lambda.
AWS Lambda runs functions on demand and manages the underlying compute. It is commonly triggered by API Gateway, S3, EventBridge, queues, and streams. The key is to match the exact action in the prompt to the tool, command, or concept that performs that action directly. Here, B. AWS Lambda is the only option that satisfies the scenario without adding unrelated behavior.
The Question
Which service runs code in response to events without managing servers?
Why B is correct
AWS Lambda runs functions on demand and manages the underlying compute. It is commonly triggered by API Gateway, S3, EventBridge, queues, and streams. The key is to match the exact action in the prompt to the tool, command, or concept that performs that action directly. Here, B. AWS Lambda is the only option that satisfies the scenario without adding unrelated behavior.
Why the other options are wrong
Option A does not match the requirement in the prompt. The correct answer is B because AWS Lambda runs functions on demand and manages the underlying compute. It is commonly triggered by API Gateway, S3, EventBridge, queues, and streams.
Option C does not match the requirement in the prompt. The correct answer is B because AWS Lambda runs functions on demand and manages the underlying compute. It is commonly triggered by API Gateway, S3, EventBridge, queues, and streams.
Option D does not match the requirement in the prompt. The correct answer is B because AWS Lambda runs functions on demand and manages the underlying compute. It is commonly triggered by API Gateway, S3, EventBridge, queues, and streams.
Key idea: Serverless
Serverless questions test whether you can connect a common workflow problem to the right practical command, service, or concept. Instead of memorizing isolated definitions, look for the job being done in the prompt: staging a file, querying rows, running code, persisting container data, checking a service, or choosing the right cloud building block. The best answer usually names the simplest tool that performs that job directly. For AWS Cloud Fundamentals, the safest study pattern is to read the scenario, underline the action verb, and eliminate answers that solve a different problem. If an option sounds related but changes the scope, adds risk, or describes a different layer of the stack, it is probably a distractor. After choosing an answer, explain why the other three fail; that habit builds the practical judgment these quizzes are meant to measure.
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