25. In-Place Frequency Sort Explained | Google 2025 Interview Question 🔥 (Java | Step-by-Step)

Most students think sorting is easy… until Google changes the rules. In this video, we break down a real Google-style interview problem: “In-Place Sort by Frequency and Value” But this is NOT just about Arrays.sort(). You’ll learn: ✔ How to count frequency using HashMap (explained from scratch) ✔ What a Comparator actually does (no prior knowledge needed) ✔ Why Integer[] is required instead of int[] ✔ How to preserve original order during sorting ✔ How to think like an interviewer We go line by line and explain every concept clearly — Map, HashMap, Comparator, Stability — assuming zero prior knowledge. If you're preparing for: • Google • Product-based companies • Coding interviews • DSA mastery • Java placements This video will change how you think about sorting problems. 🔥 Stop memorizing. Start understanding. Watch till the end for dry run + interview tips. #Java #GoogleInterview #DSA #Sorting #CodingInterview If you are preparing for FAANG interviews, system design rounds, or advanced DSA — this video is for you. If you want more Microsoft / Amazon / Google DSA patterns, subscribe and comment your next topic 👇 Happy learning! 🚀 📌 Subscribe & follow the playlist to build DSA the right way — from the system level. https://www.youtube.com/playlist?list=PL0n99JuVgkzlaz_g5cM2b5r9lOFD5ghy0 ━━━━━━━━━━━━━━━ 📌 Timestamps ━━━━━━━━━━━━━━━ 00:00 – Problem Statement 01:46 – Algorithm 03:55 – Full Code Begins 04:00 – main() Method 10:40 – Output 10:50 – Outro ━━━━━━━━━━━━━━━ 💡 Connect with me ━━━━━━━━━━━━━━━ If you love clear DSA explanations, subscribe for more. #Hashmap #MicrosoftInterview #DSA #JavaProgramming #FAANGPrep #SystemDesign #CodingInterview 👍 If this helped you: Like the video Subscribe for DSA explained clearly Comment “HASHMAP” for more problems If this helped you, **LIKE 👍 | SUBSCRIBE 🔔 | SHARE** with your study group!