super hard
What does “elastic” mean in Amazon EC2?
“Elastic” in Amazon EC2 means you can easily increase or decrease the number of servers or adjust their size automatically based on demand.
What tool is used to launch EC2 instances easily?
The Launch Instance Wizard is the tool used to easily launch EC2 instances.
What is the root volume in an EC2 instance?
The root volume is the main storage volume where the guest operating system is installed.
What is an Amazon Machine Image (AMI)?
An Amazon Machine Image (AMI) is a template used to launch EC2 instances that includes the operating system, application software, and configuration settings.
Name two types of AMIs available when launching an instance.
Two types of AMIs are Quick Start AMIs and My AMIs.
What is the difference between EBS and instance store?
EBS is durable and persistent storage that remains after an instance stops, while instance store is temporary storage that is lost when the instance stops or terminates.
What is the difference between a guest operating system and a host operating system?
A guest operating system runs inside a virtual machine, while a host operating system is installed directly on the physical hardware that supports those virtual machines.
What factors does an instance type determine?
An instance type determines memory, CPU processing power, storage capacity and type, and network performance.
When would you use Amazon EFS instead of EBS?
You would use Amazon EFS instead of EBS when you need a scalable, shared file system that can be accessed by multiple instances at the same time.
What are security groups and what do they control?
Security groups are virtual firewalls that control inbound and outbound traffic to EC2 instances by specifying allowed ports, protocols, and sources.
What is the purpose of an IAM role when attached to an EC2 instance?
An IAM role attached to an EC2 instance allows the instance to securely interact with other AWS services without storing credentials on the instance.
What is enhanced networking and why is it important?
Enhanced networking improves network performance by enabling higher bandwidth, lower latency, and better packet processing using advanced network adapters.
Explain how EC2 allows organizations to handle traffic spikes more efficiently than on-premises infrastructure.
EC2 allows organizations to handle traffic spikes more efficiently than on-premises infrastructure because resources can be scaled up or down on demand, so companies don’t need to over-provision hardware in advance and can automatically add instances during peak usage and remove them when demand drops.
Explain how user data scripts reduce the need for multiple custom AMIs.
User data scripts reduce the need for multiple custom AMIs because they automate software installation and configuration at launch, allowing a single base AMI to be reused and customized dynamically when instances start.
Compare EBS, instance store, EFS, and S3 in terms of persistence, scalability, and use cases.
EBS provides persistent block storage for individual instances, instance store provides temporary high-speed storage tied to the host, EFS offers scalable shared file storage for multiple instances, and S3 provides highly scalable object storage for long-term data with high durability and availability.