Amazon EC2 Flashcards
Q: What is Amazon EC2?
A: Amazon Elastic Compute Cloud (EC2) provides scalable virtual servers in the cloud.
Q: What are the main features of EC2?
A: Elasticity, various instance types, multiple pricing options, customizable configurations, and integrations with other AWS services.
Q: What are the categories of EC2 instance types?
A: General purpose, Compute optimized, Memory optimized, Storage optimized, and Accelerated computing.
Q: What are the EC2 pricing models?
A: On-Demand, Reserved Instances, Spot Instances, Savings Plans, and Dedicated Hosts.
Q: What are On-Demand Instances?
A: Instances paid for by the second, with no long-term commitment or upfront payment.
Q: What are Reserved Instances?
A: Instances purchased for a 1- or 3-year term with significant cost savings compared to On-Demand.
Q: What are Spot Instances?
A: Instances available at a discount, suitable for workloads that can tolerate interruptions.
Q: What are Dedicated Hosts?
A: Physical servers dedicated to a single customer for regulatory or licensing requirements.
Q: What are the main states in the EC2 instance lifecycle?
A: Pending, Running, Stopping, Stopped, Shutting-Down, and Terminated.
Q: What is a security group in EC2?
A: A virtual firewall that controls inbound and outbound traffic for EC2 instances.
Q: What are key pairs in EC2?
A: Cryptographic pairs used to securely connect to EC2 instances.
Q: What is Amazon EBS?
A: Block storage volumes attached to EC2 instances for persistent storage.
Q: What is an Amazon Machine Image (AMI)?
A: A template with an operating system, application server, and applications for launching instances.
Q: What is an Elastic IP address?
A: A static IPv4 address designed for dynamic cloud computing, allowing reassignment between instances.
Q: What is an Instance Store in EC2?
A: Temporary block storage that is physically attached to the host and lost when the instance stops or terminates.