AWS Services SQS Distributed queue system. Pull based. Used to decouple an application. Gives access to a message queue. Stores messages while waiting for a computer to process them. Message in the SQS queue will continue to exist even after the EC2 instance has processed it until you delete that message. You have to ensure that you delete the Read more about AWS Certified Solutions Architect Exam Notes – Services[…]
Lambda – Serverless Event-driven computing service. There is no server running. An event comes and the code gets executed. Serverless scales instantly (scales out, not up). If 1 million users hit the same request, 1 million lambdas will run the code. No Servers. No antivirus. No maintenance. No admins. No patching. Supported languages Node.js Java C# Python Read more about AWS Certified Solutions Architect Exam Notes – Lambda[…]
VPC – Virtual Private Cloud A logically isolated section of AWS cloud. Provides complete control over the environment. Cannot have one Subnet to many AZs 5 VPCs per region by default In Amazon VPC an instance retains its private IP. How to make an instance on a public subnet reachable? Create an elastic IP address Read more about AWS Certified Solutions Architect Exam Notes – VPC[…]
S3 – Simple Storage Service Key-based, Object-based storage Cannot run an OS or a DB on S3. Can only store files. S3 has a universal namespace. The name of the bucket has to be unique. A web address is created for the bucket using that name. When upload a file -> HTTP 200 successful Unlimited storage. Object size: 0 – 5 Read more about AWS Certified Solutions Architect Exam Notes – S3[…]
Databases RDS Runs on virtual machines. We have no access to those. RDS is not serverless (except Aurora Serverless). They have a server but are maintained by Amazon. Why not run SQL on an EC2 instance? To avoid administration. (There may be some use cases that you need to handle your own DB, and EC2 may Read more about AWS Certified Solutions Architect Exam Notes – Databases[…]
Cloud Infrastructure Regions Geographical Area Consists of 2 or more AZs Availability Zones – AZ A Facility – Data Center Can be one or several Data Centers which are close to each other. Edge Locations Endpoints for AWS used for caching content. More than regions. IAM – Identity Access Management What IAM offers? Centralized control Read more about AWS Certified Solutions Architect Exam Notes – IAM[…]
Recently I passed the AWS Certified Solution Architect Associate exam. During my preparation for this exam, I collected some exam notes from different sources (courses, tutorials, and AWS docs). Those notes cover all the different fields from which the exam questions are derived. The post is not intended to act as the single studying resource of your preparation. The main intention of Read more about AWS Certified Solutions Architect Exam Notes[…]