Understanding AWS Pricing and Services

What is the pricing model for EC2 on-demand instances?

• You pay based on the number of instances launched, not usage.

• You pay a flat monthly fee regardless of usage.

• You pay for EC2 on-demand instances by the hour or second, based on usage.

• You only pay for the storage used by the instances.

How do spot instances differ from on-demand instances?

• On-demand instances can be interrupted at any time.

• Spot instances are always more expensive than on-demand instances.

• Spot instances are cheaper but can be interrupted; on-demand instances are more expensive but stable.

• Spot instances provide guaranteed availability at all times.

What are reserved instances in AWS EC2?

• Reserved instances are a cost-saving option for AWS EC2 that allows users to reserve capacity for a specific instance type over a set term.

• Reserved instances are a type of on-demand pricing for AWS EC2.

• Reserved instances are a feature that allows users to run multiple instance types simultaneously.

• Reserved instances are temporary instances that can be launched at any time.

Explain the concept of Amazon ECS.

• Amazon ECS is a programming language for web development.

• Amazon ECS is a cloud storage service for files.

• Amazon ECS is a managed service for running and orchestrating Docker containers.

• Amazon ECS is a tool for managing virtual machines.

What is Amazon EKS used for?

• Amazon EKS is used for storing data in S3 buckets.

• Amazon EKS is used for managing virtual machines on EC2.

• Amazon EKS is used for managing Kubernetes clusters in the cloud.

• Amazon EKS is used for building serverless applications with Lambda.

How does AWS Fargate simplify container management?

• AWS Fargate does not automatically scale resources based on demand.

• AWS Fargate requires manual server management for containers.

• AWS Fargate simplifies container management by removing the need to manage servers and automatically provisioning resources.

• AWS Fargate only supports Windows containers.

What is the purpose of AWS Elastic Load Balancing?

• To provide a single point of access for all application requests.

• To store application data in a centralized location.

• To distribute incoming application traffic across multiple targets for high availability and fault tolerance.

• To automatically scale application resources based on user demand.

How does EC2 Auto Scaling work?

• EC2 Auto Scaling is limited to a maximum of five instances.

• EC2 Auto Scaling adjusts the number of EC2 instances based on demand using scaling policies.

• EC2 Auto Scaling requires manual intervention to adjust instance counts.

• EC2 Auto Scaling only works with on-demand instances.

What factors influence the pricing of EC2 instances?

• Instance type, region, pricing model, usage duration, and additional features.

• Network bandwidth availability

• User account type

• Operating system version

What are the benefits of using reserved instances over on-demand instances?

• No long-term commitment required.

• Automatic scaling and load balancing.

• Higher performance and flexibility.

• Cost savings and capacity reservation.