AWS Compute Services Flashcards

Which EC2 purchasing option provides up to 90% discount compared to On-Demand pricing but can be interrupted by AWS with a 2-minute warning?

Answer: Spot Instances

Spot Instances use spare EC2 capacity at steep discounts but AWS can reclaim them with a 2-minute interruption notice.

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

Answer: 15 minutes

AWS Lambda functions have a maximum execution timeout of 15 minutes (900 seconds).

Which AWS service allows you to run containers without managing the underlying EC2 instances?

Answer: AWS Fargate

AWS Fargate is a serverless compute engine for containers that removes the need to provision or manage EC2 instances.

An application needs to scale EC2 instances based on a schedule, adding capacity every Monday morning and reducing it Friday evening. Which Auto Scaling policy should be used?

Answer: Scheduled Scaling

Scheduled Scaling adjusts capacity at specific, predetermined times, making it ideal for predictable load patterns.

Which EC2 instance family is optimized for workloads requiring high memory-to-vCPU ratios, such as in-memory databases like SAP HANA?

Answer: R-family (Memory Optimized)

R-family instances are Memory Optimized and provide high RAM-to-vCPU ratios for in-memory databases and real-time big data analytics.

What feature of EC2 Auto Scaling replaces unhealthy instances automatically based on health checks from EC2 or an Elastic Load Balancer?

Answer: Health Check Replacement

Auto Scaling's Health Check Replacement terminates instances that fail EC2 or ELB health checks and launches new ones automatically.

Which AWS compute service is specifically designed for running batch computing workloads by dynamically provisioning the optimal quantity and type of compute resources?

Answer: AWS Batch

AWS Batch dynamically provisions compute resources and manages job queues to run batch workloads efficiently at any scale.