Debugging mindset 1. Assume nothing 2. Log everything 3. Reproduce the bug 4. Fix one thing at a time

Abstraction vs Encapsulation in Java ✅

Skills worth more than any framework 👉 1. Writing clear code 2. Asking good questions 3. Explaining complex things simply 4. Knowing when not to build

Normalization vs Denormalization in Databases ✅

Final vs Finally vs Finalize in Java 👉

HashMap vs Hashtable vs ConcurrentHashMap ✅

How software breaks? 😂 Slowly → Technical debt Suddenly → Missing tests Quietly → Race conditions Loudly → Deploy on Friday

Synchronized vs Concurrent Collections in Java ✅

When designing systems, remember that 1. Latency is a feature 2. Reliability is invisible until it fails 3. Complexity always comes back 4. Scalability ≠ simplicity

Java Stream Api Interview Questions ✅

Signs you’re growing as a Software Engineer: - You delete more code than you add - You ask "why" more than "how" - You see trade-offs, not absolutes - You write docs without being told

DSA Interviews : Backtracking Basics & Cheatsheet 👉

Spring Boot Advanced Annotations Cheatsheet ✅

How Redis Works Internally? 👉

System Design Concepts to Master before Interviews ✅ 1. Horizontal vs Vertical Scaling 2. Latency vs Throughput 3. Load Balancers (Round Robin, Consistent Hashing) 4. Caching strategies (LRU, LFU, Write-through, Write-back) 5. Database Scaling: Sharding, Replication, Indexing