Posts by Category

• System Design 59
• Microservices 51
• Java 41
• Algorithms 34
• Developer Tools 28
• Health 23
• DevOps 18
• Electronics 18
• java 16
• Travel 15
• SQL 15
• Performance Engineering 15
• multithreading 13
• concurrency 13
• Git 10
• Design Patterns 10
• Architecture 8
• GCP 7
• Finance 5
• Testing 4
• management 4
• Management 4
• Culture 3
• Database 3
• Photography 2
• Books 2
• backend 2
• reference 1
• Productivity 1
• Machine Learning 1
• Python 1
• Hobbies 1
• Programming 1
• Career 1
• Science 1
• Operating Systems 1
• Crafts 1
• Legal 1
• Lifestyle 1
• History 1
• SAGA Pattern 1
• Geography 1
• web 1
• spring 1
• design-patterns 1
• reflection 1

System Design

Cassandra - Column-Oriented Database

5 minute read

MongoDb - Document-Oriented Database

4 minute read

System Design Plan

5 minute read

IP Addressing

1 minute read

Network Requirements Estimation

3 minute read

Database Requirements Estimation

2 minute read

Daily Active Users - Approximation

1 minute read

Monitoring & Logging

less than 1 minute read

Http Status Codes & Java Exceptions

2 minute read

Paxos

less than 1 minute read

Zookeeper

less than 1 minute read

DB Locking mechanism

less than 1 minute read

HyperLogLog

1 minute read

Serverless Architecture

4 minute read

P2P - Peer-to-peer

3 minute read

DNS - Domain Name System

less than 1 minute read

Tech Stack

less than 1 minute read

Skip Lists

2 minute read

SSTables - Sorted String Tables

2 minute read

LSM Tree - Log-Structured Merge Tree

1 minute read

SSO

less than 1 minute read

OAuth 2.0 Authentication

less than 1 minute read

HTTPS

3 minute read

Authentication Mechanisms

less than 1 minute read

API Security

less than 1 minute read

WebHooks

1 minute read

DB Data Structures

less than 1 minute read

Web Sockets

2 minute read

RPC & gRPC

3 minute read

Bloom Filters

1 minute read

Distributed Databases

4 minute read

Distributed Systems

less than 1 minute read

Distributed Computations

1 minute read

CAP Theorem

less than 1 minute read

Deployments

2 minute read

TCP

1 minute read

Forward Proxy vs Reverse Proxy

less than 1 minute read

No SQL DB

1 minute read

Redis

less than 1 minute read

Scan to Pay

less than 1 minute read

Live Streaming

1 minute read

API Gateway

less than 1 minute read

Consistent Hashing

2 minute read

HTTP (1/2/3)

1 minute read

Passwords in DB

less than 1 minute read

System Design Drills

13 minute read

Distributed Messaging

5 minute read

Containers vs Virtual Machine

less than 1 minute read

API Communication Protocols

2 minute read

Security

1 minute read

Rate Limiting

1 minute read

Database Replication & Migrations

2 minute read

Caches

5 minute read

DB Transaction Isolation Levels

5 minute read

Data Consistency Levels

2 minute read

Databases

1 minute read

Back of the envelop estimations

2 minute read

Scaling Vertical vs Horizontal

less than 1 minute read

Computer Networks - The OSI Model

2 minute read

Back to top ↑

Microservices

Migrating HTTP APIs to HTTPS in Spring Boot - Planning & Implementation

8 minute read

Spring Component Scanning, AOT & Native-Image Reflection

5 minute read

Containerizing Spring Boot with Docker

4 minute read

Database Migration with Flyway

3 minute read

Resilience Patterns and Fault Tolerance with Resilience4J

7 minute read

Advanced Testing in Spring Boot

4 minute read

Reactive Programming with Spring WebFlux

4 minute read

Spring Security

5 minute read

Spring Boot SSL/TLS Configuration Guide

10 minute read

SSL/TLS Certificates, Keystores & Trust Management

12 minute read

BOM vs Parent POM

less than 1 minute read

Spring Boot Startup Process

8 minute read

Complete Guide to SpringBoot Server-Sent Events (SSE): Real-time Server Push

11 minute read

Complete Guide to SpringBoot WebSockets: Real-time Communication Patterns

15 minute read

Complete Guide to SpringBoot Webhooks: Implementation, Security & Best Practices

9 minute read

Aspect Oriented Programming (AOP)

13 minute read

SpringBoot Profile

less than 1 minute read

SpringBoot with Virtual Threads

less than 1 minute read

Caffeine Cache

less than 1 minute read

Prometheus & Micrometer: Metrics, Instrumentation, Monitoring & Observability

24 minute read

CommandLineRunner - Spring Boot

less than 1 minute read

Gcp Logs

less than 1 minute read

Testing Estimations

less than 1 minute read

ssl Security Certificate Issue

less than 1 minute read

Spring Actuator

1 minute read

Spring Scheduler

less than 1 minute read

Caching with Redis

1 minute read

Rest Template

1 minute read

Gradle

less than 1 minute read

Kafka Essentials

4 minute read

Exception Handling in Spring

4 minute read

GET REST Calls

less than 1 minute read

DELETE REST Calls

less than 1 minute read

Swagger Documentations

less than 1 minute read

Spring Validations

4 minute read

Spring Path variable & Request Parameter

1 minute read

SpringBoot Reference

19 minute read

POST API

1 minute read

MapStruct Mapper

3 minute read

Jackson Mapper

3 minute read

Idempotence & HTTP Methods - Designing RESTful URI’s

2 minute read

Gradle - build & tool

less than 1 minute read

Default method in Interface

3 minute read

Hibernate

2 minute read

Dependency Injection

4 minute read

Spring Data JPA & CRUD - GET PUT POST DELETE

2 minute read

Spring Transactions

7 minute read

Designing a microservice

less than 1 minute read

Spring Config Client

less than 1 minute read

Zipkin Distributed Tracing Server

less than 1 minute read

Spring Cloud Sleuth

less than 1 minute read

Back to top ↑

Java

Java + Kafka + SSL Interview Answers

6 minute read

Spring Bean : Scopes, Lifecycle, and Best Practices

12 minute read

Gatherers

less than 1 minute read

Records & Sealed Classes

3 minute read

Java Coding Practices

4 minute read

Collectors in Java Streams

3 minute read

JVM Architecture and Java Compilation Process

3 minute read

Nested Classes in Java

3 minute read

Java annotations

6 minute read

Java Compiler Code Optimization

2 minute read

Java Cloning

3 minute read

Variable Scopes in Java

1 minute read

Exceptions in Java

5 minute read

Sonarcube on local

less than 1 minute read

Switch

2 minute read

Java Puzzles

4 minute read

Wrapper Classes - Parse & ValueOf

1 minute read

Parallel Streams

3 minute read

Collectors - Deep Dive

6 minute read

Higher Order Functions

less than 1 minute read

Supplier Functional Interface

less than 1 minute read

Predicate Functional Interface

less than 1 minute read

Generics

7 minute read

Function Functional Interface

less than 1 minute read

Consumer Functional Interface

less than 1 minute read

Method Reference

2 minute read

Sorting

1 minute read

Java Mailing API

1 minute read

Polymorphism

3 minute read

Static & Static Factory Methods

less than 1 minute read

Lambda Expressions & Functional Interface

4 minute read

Reactive Programming

1 minute read

Java IO

1 minute read

Functional Programming Concepts

8 minute read

Serialization & Externalization

4 minute read

Java Streams

4 minute read

Java Stream Issues

less than 1 minute read

Java ZonedDate Time

5 minute read

Optional - Use cases

5 minute read

Java Interview Questions

15 minute read

Collection Framework

3 minute read

Back to top ↑

Algorithms

Recursive Backtracking - Dynamic Programming - Grids

2 minute read

Recursive Backtracking - Combinations

2 minute read

Recursive Backtracking - Step by Step Guide

15 minute read

Recursive Backtracking - Permutations

2 minute read

Recursive Backtracking - Theory

1 minute read

Recursion

3 minute read

Recursion

8 minute read

Code templates

6 minute read

Data Structures - Implementations

5 minute read

B Trees, B+ Trees, m-ary/m-way Trees

1 minute read

AVL Tree

2 minute read

Graph Traversal (DFS & BFS)

3 minute read

Graphs

1 minute read

Dynamic Programming - Iteration

less than 1 minute read

Dynamic Programming - DP

4 minute read

Union Find - Disjoint Set Data structure

5 minute read

Algo Drills

17 minute read

Math

2 minute read

Double Utility Class

less than 1 minute read

Integer & Long

1 minute read

Bitwise Operators

10 minute read

Character Utility Class

1 minute read

Boolean

less than 1 minute read

Strings

3 minute read

Sets

less than 1 minute read

Iterator

less than 1 minute read

Heaps

less than 1 minute read

Searching

less than 1 minute read

Maps

2 minute read

Array Problems

9 minute read

Stacks

1 minute read

Queue

less than 1 minute read

Linked List

4 minute read

Binary Trees (DFS & BFS)

3 minute read

Back to top ↑

Developer Tools

DOM in the Browser: Why It Matters for UI Testing (Playwright)

2 minute read

React Functions and Concepts: A Comprehensive Summary

4 minute read

Kuber Accounting App - React, Firebase, Firestore

3 minute read

GCC Cross Compiler - Mac installation

less than 1 minute read

JIRA Filters

less than 1 minute read

IntelliJ Shortcuts - Daily Drills

less than 1 minute read

Brave/Chrome Devtools

less than 1 minute read

Hardware Overview

less than 1 minute read

LaTeX in Markdown

1 minute read

IntelliJ Idea Debug

less than 1 minute read

MacBook : Configuring shell profile

3 minute read

dBeaver for SQL Development

less than 1 minute read

MacBook : Brew Package Migration

1 minute read

Terminal Commands

5 minute read

Large Files on Github

less than 1 minute read

Ubuntu Server Installation

less than 1 minute read

MacBook : Useful Settings

1 minute read

Hosting personal website on home router

1 minute read

Atom

less than 1 minute read

Markdown Reference

4 minute read

IntelliJ Idea Shortcuts

7 minute read

Sublime Settings

1 minute read

Configuring a new MacBook

1 minute read

IntelliJ Idea settings

2 minute read

Terminal Setup

1 minute read

Upgrading the Macbook Pro - Model A1278

1 minute read

Linux Files & Commands

4 minute read

Jekyll Blog and Hosting on GitHub

less than 1 minute read

Back to top ↑

Health

Drinks and Smoothies

less than 1 minute read

Juiced Drinks

less than 1 minute read

Drinks and Fruit mocktails

1 minute read

Coffee

2 minute read

Yoga - योग, योगासन, योगाभ्यास

less than 1 minute read

Diet

less than 1 minute read

Pranayama - प्राणायाम

2 minute read

Pre/Post Workout Meals

less than 1 minute read

Strength Training - Gym - Muscle Building Plan

1 minute read

Roti

less than 1 minute read

Rice Substitutes & Combinations

less than 1 minute read

Breakfast Healthy

less than 1 minute read

Breads

less than 1 minute read

Vegetable Stock: Best Preparation Methods

2 minute read

Veggie snacks

1 minute read

Soups from Veggie Stock

2 minute read

Dry Fruit: Meal Plan

less than 1 minute read

Salad Plan for Lunch

6 minute read

Nutrient Guide for a Healthier Diet

3 minute read

Food Options - Understanding Seeds, Grains, Millets, Legumes & Pulses

6 minute read

Salad-dressings & Pairings - Sugar free

2 minute read

Health Drinks

5 minute read

Types of Millets

1 minute read

Back to top ↑

DevOps

DevOps End-to-End — Learning Notes for Developers

9 minute read

DORA Metrics - Measuring DevOps Performance

8 minute read

Service Mesh: Istio vs Linkerd vs Consul vs Cilium

11 minute read

Kubernetes Multi-Cluster Quick Reference

8 minute read

Kubernetes Hands-On: Building a Multi-Region E-Commerce Platform

12 minute read

Advanced Kubernetes Patterns: Service Mesh, Security & GitOps

9 minute read

Kubernetes Multi-Cluster Architecture: East-West Region Setup

10 minute read

Kubernetes on Google Kubernetes Engine (GKE)

4 minute read

Kubernetes Concepts

4 minute read

Kubernetes Commands

8 minute read

Terraform

less than 1 minute read

Jenkins

less than 1 minute read

DevOps Learning - Starting point

less than 1 minute read

Gitlab

less than 1 minute read

Flux Release

less than 1 minute read

Terraform

less than 1 minute read

Helm Charts with minikube

1 minute read

Docker commands

4 minute read

Back to top ↑

Electronics

Kids Science Experiments

less than 1 minute read

Arduino UNO

1 minute read

Ultrasonic Sensor

1 minute read

Servo Motor

1 minute read

RGB LED

1 minute read

Diodes

less than 1 minute read

Soft Starter

1 minute read

Gates - Not Gate with Diodes

less than 1 minute read

LDR - Light Dependent Resistor/Photoresistor

less than 1 minute read

Capacitors

less than 1 minute read

Transmitters & Receivers

less than 1 minute read

Raspberry Pi

less than 1 minute read

Boards

3 minute read

Simple Twin engine plane

less than 1 minute read

Simple Drone

2 minute read

Electronics

less than 1 minute read

Teaching Electronics

2 minute read

Electronic Components

3 minute read

Back to top ↑

java

Java Multithreading - Complete Comprehensive Series

1 minute read

Java Multithreading - Part 12: Best Practices & Patterns

7 minute read

Java Multithreading - Part 11: Structured Concurrency & Scoped Values

8 minute read

Java Multithreading - Part 10: Virtual Threads (Project Loom)

9 minute read

Java Multithreading - Part 9: Concurrent Collections

8 minute read

Java Multithreading - Part 8: CompletableFuture Mastery

10 minute read

Java Multithreading - Part 7: Executor Framework & Thread Pools

6 minute read

Java Multithreading - Part 6: Locks & Advanced Synchronization

21 minute read

Java Multithreading - Part 5: Synchronization Mechanisms

7 minute read

Java Multithreading - Part 4: Race Conditions & Critical Sections

7 minute read

Java Multithreading - Part 3: Thread Control & Coordination

5 minute read

Java Multithreading - Part 2: Thread Creation Methods

8 minute read

Java Multithreading - Part 1: Theory & Fundamentals

16 minute read

Java Reflection API: Class Objects, Metadata, and Instantiation

2 minute read

From XML Hell to Annotations: How Spring Cleaned Up Java Configuration

6 minute read

Java Servlets, Servlet Containers, and How to Build HTTP APIs Without Them

4 minute read

Back to top ↑

Travel

Seattle

1 minute read

USA Travel maps

less than 1 minute read

The historic Route 66

less than 1 minute read

NY, Boston, Philadelphia, Washington DC Trip

less than 1 minute read

Pacific Coast Highway 1 within California

less than 1 minute read

North Cascades National Park

less than 1 minute read

Florida Trips

less than 1 minute read

Denver Scenic Drives

less than 1 minute read

Seattle to San Diego Trip

less than 1 minute read

Epic Pan-American RV Journey - Complete USA Circuit (38-42 Days)

26 minute read

Trip - Nashville, Montgomary, Fort Pickens Campground

less than 1 minute read

Trip to Roanoke Islands and Kitty Hawk

less than 1 minute read

Trip from Denver to Nashville

less than 1 minute read

Solo trip - Denver to San Fransisco

7 minute read

Trip - Denver to Aspen

less than 1 minute read

Back to top ↑

SQL

Clustering Vs Partitioning

less than 1 minute read

Distributed DB Query Optimization

13 minute read

SQL/Query Optimization

5 minute read

Oracle DB

1 minute read

Materialized views

1 minute read

Savepoint

1 minute read

Triggers

1 minute read

Oracle PL/SQL

4 minute read

SQL Window Aggregate Functions

less than 1 minute read

SQL Window Functions

less than 1 minute read

SQL Subqueries

less than 1 minute read

SQL Joins

1 minute read

Transactional Tables

less than 1 minute read

SQL Basics

4 minute read

SQL Nornmalization

less than 1 minute read

Back to top ↑

Performance Engineering

Gatling - Microservices Load Testing

26 minute read

Load Testing with Grafana K6

less than 1 minute read

String Intern pool, Hashmaps and Collections

1 minute read

Memory Leaks

2 minute read

Java Code Optimization

1 minute read

API Optimizations

less than 1 minute read

JVM Arguments

3 minute read

Eclipse Memory Analyzer Tool (MAT)

less than 1 minute read

Java Mission Control - JMC

less than 1 minute read

Java Microbenchmark Harness - JMH

less than 1 minute read

Garbage Collections

5 minute read

Escaping references

1 minute read

Java Memory

5 minute read

Understanding JVM JIT: C1/C2, Tiered Compilation, and Flags

8 minute read

Java Systems Stats

less than 1 minute read

Back to top ↑

multithreading

Java Multithreading - Complete Comprehensive Series

1 minute read

Java Multithreading - Part 12: Best Practices & Patterns

7 minute read

Java Multithreading - Part 11: Structured Concurrency & Scoped Values

8 minute read

Java Multithreading - Part 10: Virtual Threads (Project Loom)

9 minute read

Java Multithreading - Part 9: Concurrent Collections

8 minute read

Java Multithreading - Part 8: CompletableFuture Mastery

10 minute read

Java Multithreading - Part 7: Executor Framework & Thread Pools

6 minute read

Java Multithreading - Part 6: Locks & Advanced Synchronization

21 minute read

Java Multithreading - Part 5: Synchronization Mechanisms

7 minute read

Java Multithreading - Part 4: Race Conditions & Critical Sections

7 minute read

Java Multithreading - Part 3: Thread Control & Coordination

5 minute read

Java Multithreading - Part 2: Thread Creation Methods

8 minute read

Java Multithreading - Part 1: Theory & Fundamentals

16 minute read

Back to top ↑

concurrency

Java Multithreading - Complete Comprehensive Series

1 minute read

Java Multithreading - Part 12: Best Practices & Patterns

7 minute read

Java Multithreading - Part 11: Structured Concurrency & Scoped Values

8 minute read

Java Multithreading - Part 10: Virtual Threads (Project Loom)

9 minute read

Java Multithreading - Part 9: Concurrent Collections

8 minute read

Java Multithreading - Part 8: CompletableFuture Mastery

10 minute read

Java Multithreading - Part 7: Executor Framework & Thread Pools

6 minute read

Java Multithreading - Part 6: Locks & Advanced Synchronization

21 minute read

Java Multithreading - Part 5: Synchronization Mechanisms

7 minute read

Java Multithreading - Part 4: Race Conditions & Critical Sections

7 minute read

Java Multithreading - Part 3: Thread Control & Coordination

5 minute read

Java Multithreading - Part 2: Thread Creation Methods

8 minute read

Java Multithreading - Part 1: Theory & Fundamentals

16 minute read

Back to top ↑

Git

Git Config

3 minute read

Git Cherry Pick

less than 1 minute read

Git Hooks

1 minute read

Git Maintenance & Clean-up

2 minute read

Git config- Multi Repo projects

3 minute read

Git Reset - Revert

2 minute read

Git Merge, Rebase, Squash and Fast forward

1 minute read

Git Log

less than 1 minute read

Useful git commands

3 minute read

Submodules & Detached Head Problem

1 minute read

Back to top ↑

Design Patterns

Object modelling

less than 1 minute read

OOPS - Class v/s Type

2 minute read

Decorator Pattern

less than 1 minute read

Laziness and Functional Programming

less than 1 minute read

Singleton Design Pattern

1 minute read

Factory Design Pattern

less than 1 minute read

Builder Design Pattern

less than 1 minute read

Strategy Pattern

less than 1 minute read

Design Principles

less than 1 minute read

SOLID Principles

3 minute read

Back to top ↑

Architecture

Event Sourcing

less than 1 minute read

The Pipeline (or Pipe-Filter) architectural style

4 minute read

Onion/Clean Architecture Style

less than 1 minute read

Cloud Native

1 minute read

Sidecar Pattern

less than 1 minute read

Command Query Responsibility Segregation

less than 1 minute read

Architectural Patterns

2 minute read

Code Quality

less than 1 minute read

Back to top ↑

GCP

GCP Commands

6 minute read

Google BigQuery

less than 1 minute read

Google TimeZone API

less than 1 minute read

Google GeoCoding API

less than 1 minute read

Spanner Database

1 minute read

Handling Multiple GCP Configs

2 minute read

GCP - Free Tier Setup

less than 1 minute read

Back to top ↑

Finance

Understanding US Debt and Its Major Lenders

2 minute read

Understanding Your 401(k) Contributions

2 minute read

Finances

1 minute read

Financial Charts

1 minute read

Trading

2 minute read

Back to top ↑

Testing

Automation Testing - Automation Exercise

less than 1 minute read

A Guide to Behavior-Driven Development (BDD) with JBehave

7 minute read

PowerMock Testing Guide: When Standard Mocking Isn’t Enough

7 minute read

Comprehensive Guide to JUnit and Mockito Testing

10 minute read

Back to top ↑

management

Scrum Glossary: Complete A-Z Terminology Reference

8 minute read

The Complete Scrum Guide: Framework, Roles, Events & Artifacts

10 minute read

Agile Principles & Scrum vs Kanban Comparison

6 minute read

Agile Concepts

less than 1 minute read

Back to top ↑

Management

Software Engineering Books

less than 1 minute read

Major psychological theories and behavioral science principles

1 minute read

Principles in software engineering

less than 1 minute read

Management Aphorisms

less than 1 minute read

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Culture

Shloka - ॐ ॐ ॐ

2 minute read

षोडशः संस्कार (The 16 Sanskars)

1 minute read

Mahabharat Family tree

less than 1 minute read

Back to top ↑

Database

Azure Databricks & Apache Spark

1 minute read

Importing MySql data dump from a sql file

less than 1 minute read

MySql to Spanner Migration using HarbourBridge

1 minute read

Back to top ↑

Photography

Sony A7iii Camera Settings

less than 1 minute read

Sony A7iii Camera Panning

less than 1 minute read

Back to top ↑

Books

The Five Dysfunctions of a Team

less than 1 minute read

The Project Phoenix

2 minute read

Back to top ↑

backend

From XML Hell to Annotations: How Spring Cleaned Up Java Configuration

6 minute read

Java Servlets, Servlet Containers, and How to Build HTTP APIs Without Them

4 minute read

Back to top ↑

reference

GRE Vocabulary Reference

221 minute read

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Productivity

Useful MS Excel Tools

less than 1 minute read

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Machine Learning

OpenAi and Prompt Engineering

less than 1 minute read

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Python

Python Concepts

less than 1 minute read

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Hobbies

Gardening

4 minute read

Back to top ↑

Programming

javascript

less than 1 minute read

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Career

Behavioural

less than 1 minute read

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Science

Rocks

less than 1 minute read

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Operating Systems

OS Kernal

less than 1 minute read

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Crafts

Book Binding

less than 1 minute read

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Legal

Legal Vocabulary

3 minute read

Back to top ↑

Lifestyle

Dressing Clothing

less than 1 minute read

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History

US History timeline and Government

1 minute read

Back to top ↑

SAGA Pattern

SAGA Architecture Style & 2-Phase Commit

4 minute read

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Geography

US Geography

less than 1 minute read

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web

Java Servlets, Servlet Containers, and How to Build HTTP APIs Without Them

4 minute read

Back to top ↑

spring

From XML Hell to Annotations: How Spring Cleaned Up Java Configuration

6 minute read

Back to top ↑

design-patterns

UML Relationships in Java

5 minute read

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reflection

Java Reflection API: Class Objects, Metadata, and Instantiation

2 minute read

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