Compute Services Flashcards

A company wants to run containerized applications without managing the underlying servers. Which AWS service is the best fit?

Answer: AWS Fargate

AWS Fargate is a serverless compute engine for containers that removes the need to provision or manage servers.

Which EC2 pricing model provides the largest discount in exchange for a firm 1- or 3-year commitment with full upfront payment?

Answer: Reserved Instances

Reserved Instances with an all-upfront, 3-year term offer the steepest discount (up to ~72%) compared to On-Demand pricing.

What happens to an EC2 Spot Instance when AWS needs the capacity back?

Answer: It receives a 2-minute warning and is then terminated

AWS provides a 2-minute interruption notice before reclaiming a Spot Instance, after which it is stopped or terminated.

Which AWS service lets you run code in response to events such as an S3 object upload without provisioning any servers?

Answer: AWS Lambda

AWS Lambda executes code triggered by events and automatically manages all the underlying compute infrastructure.

A startup needs a simple way to deploy a web application without worrying about infrastructure configuration. Which service handles capacity provisioning, load balancing, and monitoring automatically?

Answer: AWS Elastic Beanstalk

Elastic Beanstalk is a PaaS that automatically handles deployment, scaling, load balancing, and health monitoring for web applications.

Which EC2 instance type is optimized for workloads that require high memory-to-CPU ratios, such as in-memory databases?

Answer: Memory Optimized (R family)

Memory Optimized instances (R, X, and z1d families) are designed for workloads that process large datasets in memory, like Redis or SAP HANA.

Amazon EC2 Auto Scaling helps with which two pillars of the AWS Well-Architected Framework?

Answer: Reliability and Cost Optimization

Auto Scaling improves Reliability by replacing unhealthy instances and Cost Optimization by scaling in during low demand.