Posts by Category

• Java 78
• System Design 59
• Microservices 45
• Spring 37
• Algorithms 31
• Developer tools 22
• Health 17
• Electronics 17
• Multithreading 15
• SQL 14
• Performance Engineering 13
• Git 10
• Miscellaneous 10
• DevOps 10
• GitOps 10
• Design Patterns 10
• Object Oriented Design 5
• MacBook 4
• GCP 4
• Shortcuts 3
• Photography 2
• Machine Learning 2
• Database 2
• Finances 2
• Code Quality 1
• Mahabharat 1
• Excel 1
• Python 1
• javascript 1
• Coding 1
• Management 1

Java

Nested Classes in Java

3 minute read

Java Compilation Process & JVM Architecture

3 minute read

Java annotations

2 minute read

Concurrent Collections

less than 1 minute read

Semaphores

4 minute read

Reentrant Lock

3 minute read

Condition Variables

less than 1 minute read

Synchronization Mechanisms in Java

2 minute read

Java Compiler Code Optimization

2 minute read

Volatile Variable

1 minute read

Thread Creation

2 minute read

Java Cloning

1 minute read

Scoped Value

1 minute read

Multithreading Theory

12 minute read

Thread-local storage (TLS) in multithreading

less than 1 minute read

Variable Scopes in Java

1 minute read

Structured Concurrency

2 minute read

Virtual Threads

4 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

Object modelling

less than 1 minute read

Class v/s Type

2 minute read

Decorator Pattern

less than 1 minute read

UML

4 minute read

JVM Arguments

2 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

Compiler Flags

8 minute read

Exceptions in Java

5 minute read

Gradle

less than 1 minute read

Sonarcube on local

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

Iterator As a Design Pattern

1 minute read

Switch

1 minute read

Java Puzzles

4 minute read

Java Systems Stats

less than 1 minute read

CompletableFutures & Asynchronous Programming

6 minute read

Wrapper Classes - Parse & ValueOf

1 minute read

Parallel Streams

3 minute read

Collectors

5 minute read

Design Principles

less than 1 minute read

SOLID Principles

3 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

3 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

4 minute read

Static

less than 1 minute read

Generics

4 minute read

Synchronization - Race Condition & Critical Section

8 minute read

Lambda Expressions & Functional Interface

2 minute read

Static Factory Methods

less than 1 minute read

Reactive Programming

1 minute read

Java IO

less than 1 minute read

Functional Programming Concepts

7 minute read

Serialization & Externalization

6 minute read

Java Streams

2 minute read

Java Stream Issues

less than 1 minute read

Java ZonedDate Time

5 minute read

Multithreading

7 minute read

Optional Use cases

5 minute read

Java Interview Questions

15 minute read

Java Collection Class

less than 1 minute read

Back to top ↑

System Design

Network Requirements Estimation

3 minute read

Database Requirements Estimation

2 minute read

Daily Active Users - Approximation

1 minute read

Cloud Native

1 minute read

Monitoring & Logging

less than 1 minute read

Sidecar Pattern

less than 1 minute read

Command Query Responsibility Segregation

less than 1 minute read

Architectural Patterns

2 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

3 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

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

Spring Security

2 minute read

Spring Boot Startup Process

8 minute read

SpringBoot WebSockets

less than 1 minute read

SpringBoot Webhooks

less than 1 minute read

Aspect Oriented Programming (AOP)

2 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

3 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

Power Mock Tests

less than 1 minute read

Mockito Junit Tests

6 minute read

Kafka Essentials

3 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

10 minute read

POST API

1 minute read

MapStruct Mapper

3 minute read

Jackson Mapper

3 minute read

Idempotence & HTTP Methods - Designing RESTful URI’s

3 minute read

Spring Bean Scope

4 minute read

Gradle - build & tool

less than 1 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

Default method in Interface

less than 1 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 ↑

Spring

Spring Security

2 minute read

Spring Boot Startup Process

8 minute read

SpringBoot WebSockets

less than 1 minute read

SpringBoot Webhooks

less than 1 minute read

Aspect Oriented Programming (AOP)

2 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

3 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

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

10 minute read

POST API

1 minute read

MapStruct Mapper

3 minute read

Jackson Mapper

3 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

Default method in Interface

less than 1 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 ↑

Algorithms

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

less than 1 minute read

AVL Tree

1 minute read

Data Structures in Java

5 minute read

Breadth First Search (BFS) Traversal

less than 1 minute read

Depth First Search (DFS) Traversal

less than 1 minute read

Graphs

less than 1 minute read

Dynamic Programming - Iteration

less than 1 minute read

Dynamic Programming - DP

2 minute read

Dynamic Programming - Grids

2 minute read

Union Find - Disjoint Set Data structure

5 minute read

Algo Drills

13 minute read

Math

2 minute read

Arrays, List and Collections Class

2 minute read

Double Utility Class

less than 1 minute read

Bitwise Operators

10 minute read

Character Utility Class

1 minute read

Boolean

less than 1 minute read

Array Syntax

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

Coding Interview - Syntax Reference

2 minute read

Coding Hints

3 minute read

Searching

less than 1 minute read

Maps

2 minute read

Array Problems

1 minute read

Stacks

less than 1 minute read

Queue

less than 1 minute read

Trees

1 minute read

Linked List

1 minute read

Back to top ↑

Developer tools

React Functions and Concepts: A Comprehensive Summary

4 minute read

Kuber Accounting App - React, Firebase, Firestore

3 minute read

JIRA Filters

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

MacBook : Configuring shell profile

3 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

3 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

3 minute read

Jekyll Blog and Hosting on GitHub

less than 1 minute read

Back to top ↑

Health

Yog & Pranayam - प्राणायाम का अनुक्रम और समय-सारणी

2 minute read

Pre/Post Workout Meals

less than 1 minute read

Strength Training

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

2 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

less than 1 minute read

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Electronics

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 ↑

Multithreading

Semaphores

4 minute read

Reentrant Lock

3 minute read

Condition Variables

less than 1 minute read

Synchronization Mechanisms in Java

2 minute read

Volatile Variable

1 minute read

Thread Creation

2 minute read

Scoped Value

1 minute read

Multithreading Theory

12 minute read

Thread-local storage (TLS) in multithreading

less than 1 minute read

Variable Scopes in Java

1 minute read

Structured Concurrency

2 minute read

Virtual Threads

4 minute read

CompletableFutures & Asynchronous Programming

6 minute read

Synchronization - Race Condition & Critical Section

8 minute read

Multithreading

7 minute read

Back to top ↑

SQL

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

2 minute read

SQL Nornmalization

less than 1 minute read

Back to top ↑

Performance Engineering

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

2 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

Compiler Flags

8 minute read

Java Systems Stats

less than 1 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

less than 1 minute read

Back to top ↑

Miscellaneous

Legal Vocabulary

3 minute read

Shloka - ॐ ॐ ॐ

2 minute read

GCC Cross Compiler - Mac installation

less than 1 minute read

Book Binding

less than 1 minute read

OS Kernal

less than 1 minute read

Rocks

less than 1 minute read

Behavioural

less than 1 minute read

Trading

2 minute read

षोडशः संस्कार (The 16 Sanskars)

1 minute read

Gardening

less than 1 minute read

Back to top ↑

DevOps

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

Git Ops

2 minute read

Kubernetes

less than 1 minute read

Docker commands

4 minute read

Back to top ↑

GitOps

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

Git Ops

2 minute read

Kubernetes

less than 1 minute read

Docker commands

4 minute read

Back to top ↑

Design Patterns

Object modelling

less than 1 minute read

Class v/s Type

2 minute read

Decorator Pattern

less than 1 minute read

UML

4 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

Iterator As a Design Pattern

1 minute read

Back to top ↑

Object Oriented Design

Object modelling

less than 1 minute read

Class v/s Type

2 minute read

Decorator Pattern

less than 1 minute read

UML

4 minute read

Design Principles

less than 1 minute read

Back to top ↑

MacBook

MacBook : Configuring shell profile

3 minute read

MacBook : Useful Settings

1 minute read

Configuring a new MacBook

1 minute read

Terminal Setup

1 minute read

Back to top ↑

GCP

MySql to Spanner Migration using HarbourBridge

1 minute read

Spanner Database

1 minute read

Handling Multiple GCP Configs

1 minute read

GCP - Free Tier Setup

less than 1 minute read

Back to top ↑

Shortcuts

IntelliJ Shortcuts - Daily Drills

less than 1 minute read

IntelliJ Idea Debug

less than 1 minute read

IntelliJ Idea Shortcuts

7 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 ↑

Machine Learning

Python Concepts

less than 1 minute read

OpenAi and Prompt Engineering

less than 1 minute read

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Database

dBeaver for SQL Development

less than 1 minute read

Importing MySql data dump from a sql file

less than 1 minute read

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Finances

Finances

1 minute read

Financial Charts

1 minute read

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Code Quality

Code Quality

less than 1 minute read

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Mahabharat

Mahabharat Family tree

less than 1 minute read

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Excel

Useful MS Excel Tools

less than 1 minute read

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Python

Python Concepts

less than 1 minute read

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javascript

javascript

less than 1 minute read

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Coding

Integer & Long

1 minute read

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Management

Agile Concepts

less than 1 minute read

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