AWS Serverless and Lambda Architecture

Question 1

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

Accepted Answer

15 minutes

Answer

AWS Lambda functions can run for a maximum of 15 minutes (900 seconds) per execution.

Question 2

Which AWS service acts as the front door to Lambda functions for HTTP API calls?

Accepted Answer

API Gateway

Answer

Amazon API Gateway is used to create, publish, and manage RESTful and WebSocket APIs that invoke Lambda functions.

Question 3

What is a Lambda 'cold start'?

Accepted Answer

The initial latency when a new Lambda container is provisioned

Answer

A cold start occurs when Lambda must provision a new execution environment, adding latency to the first invocation.

Question 4

Which Lambda feature eliminates cold starts by keeping a specified number of execution environments initialized?

Accepted Answer

Provisioned concurrency

Answer

Provisioned concurrency pre-warms a set number of Lambda instances so they are always ready to respond without cold start delay.

Question 5

An application uses AWS Lambda and needs to share common dependencies across multiple functions. What is the best approach?

Accepted Answer

Use Lambda Layers to share code and libraries

Answer

Lambda Layers allow you to package and share libraries, custom runtimes, or other dependencies across multiple Lambda functions.

AWS Practice Test