In this post, I will share few of my notes that might be useful if you are preparing to get the AWS Solution Architect Certification.

AWS has over 200+ services, and is continuously releasing/updating existing service, it sometimes becomes difficult to track the updates. Here I am keeping some notes on some services I use and track

My notes from around the web on comparison between various AWS services

AWS Introduced Lambda function URLs, but needs SigV4 to be able to invoke them securely

Use Systems Manager Session Manager port forwarding to connect to EC2 instance through RDP

My notes on DynamoDB

AWS IAM uses Fine-Grained Authorization. Also explore whats the difference between RBAC, ABAC

My notes on AWS EBS, provisioning, performance and credits

How to implement Atomic Counters using AWS Services

How to replace traditional LAMP stack with Serverless

My notes on EC2 spot instances

VPC Gateway Endpoints vs VPC Interface Endpoints

Security Group, NACL, Route Tables

AWS Cognito notes

AWS Neptune notes

Lessons learnt while integrating API g/w directly with DynamoDB

My Notes while understanding the AWS KMS.

My Notes while studying for AWS Certified Security Specialty

Never put AWS temporary credentials in the credentials file (or env vars) — use AWS STS

Exploring the best practices for error handling in AWS Lambda

Exploring system designs for Chat, Video Stream, Sensor Data collection

My notes on the various AWS services for migration from on-prem to AWS cloud

My notes on terraform

How, When and Which Microservices Design Patterns to use.

API Gateways for North-South traffic and Service Mesh for East-West traffic. Really?

Backend architectures (N-layered, DDD, Hexagon, Onion) evolution

My notes and approches to System Design.

Consider the various Deployment strategies to upgrade a running instance of an application.

My notes about docker images.

keep track of system and application health and performance using traces, metrics and logging

Analyze the internals and differences between the Apache Kafka vs Amazon Kinesis. And also, Redis pub/sub

Analyze the read-write path of HDFS, HBase, Kafka, Zookeeper, Cassandra.

Lets consider the various streaming options available in Big Data

Lambda vs Kappa Architecture and Fraud Detection with Apache Kafka, KSQL

My notes collected over the years on Hadoop, Hbase and YARN

Understanding when to use a database, data lake, or data warehouse.

Understanding the Kubernetes Terminology

HashMaps, Bloom Filters, Count-Min sketch etc

Consistent Hashing, GeoHashes, Consensus Protocols (Paxos, Raft, Gossip), B-tree and LSM-tree

A Shallow Dive into the internals of MySQL vs Postgres

Lets evaluate the various Java versions and the differences between them

Lets overview java threading concepts

Virtual threads are a lightweight implementation of Java threads, delivered as a preview feature in Java 19

Java memory management notes

Demystifying Python Multiprocessing and Multithreading and the Global Interpreter Lock

Reference Counting and Generational Garbage Collection

Python Decorators, Generators and Context Managers

Lets discuss DNS, SSL, HTTP v1, v1.1, v2, v3, CORS, HTTPS etc

When you access a website, the display ads you see, how are they chosen?

lossless or lossy?

Session, cookie, JWT, token, SSO, OAuth 2.0, SAML

Leetcode SQL interview questions

How to calculate '-1 + (2 + 3)' programmatically

How to match 'a*b.*c' to 'basic' programmatically

How to solve a Sudoku programmatically using backtracking

How to solve nonogram puzzles programmatically using backtracking

Solve the popular interview question in which for a given N, and the mobile numeric keypad, we have to find the number of possible numbers

Given a set of positive numbers, find if we can partition it into two subsets such that the sum of elements in both the subsets is equal.

Given a lock with N circular wheels, containing slots from '0' to '9'. Find the minimum turns required to open the lock.

Graph Traversal (also known as Graph Search) refers to the process of visiting (checking and/or updating) each vertex in a graph.

Daily Coding Problem 1206, Find cycles in a directed graph

Dynamic Programming approach