Interview Prep Notes

A personal collection of notes, PDFs, and reference material for interview preparation — Java backend development, system design, and DSA.

📁 What's in here

Folder	Contents
java/	Core Java, Java 8+/17 features, Streams, Functional Interfaces, Collections
spring-boot/	Spring Boot, Spring Data, REST APIs, Microservices patterns
system-design/	LLD (Parking Lot, Elevator, Splitwise, LRU Cache, etc.) and HLD (URL Shortener, Rate Limiter, Ride-Hailing, etc.)
dsa/	LeetCode-style problems — solutions with approach notes and complexity analysis
k8s/	kubernetes concepts and notes
realtime-interview/	Notes from actual interview rounds, organized by company (e.g. accenture/)
all in one/	Reference PDFs for all topics in one file, cheat sheets, articles saved for later reading

🗂 Naming convention

• Company interview notes: company-specific/<company>/<date>-<round>.pdf (e.g. accenture/2026-07-08-technical-round.pdf)
• DSA solutions: dsa/<topic>/<problem-name>.md
• Concept notes: <topic>/<concept-name>.md

📝 Solution file format (for DSA/coding notes)

Question: <problem statement / link>
Learnings: <what this problem taught / pattern used>
Approach: <brief explanation>
Complexity: <time / space>

🎯 Conceptual note format

Definition -> Internals -> Why -> Real Usage -> Common Mistakes -> Code -> Complexity -> Follow-up Qs

✅ Progress tracker

• Java Core & Streams
• Spring Boot / Microservices
• LLD problems
• HLD problems
• DSA (~90-problem plan)
• Company-specific rounds reviewed

📌 Purpose

This repo is a single source of truth to revisit before interviews — actual questions asked, how I answered them, and the gaps I found so I don't relearn the same thing twice.