24. Microsoft Task Scheduler Explained in 20 Minutes | DLL + Priority Queue (Interview Problem)

In this video, I break down a real Microsoft interview problem (2025) on Task Scheduling using Doubly Linked List + Priority Queue. Most students think this is just a Priority Queue question — they are wrong. This problem is actually testing: Stable ordering Fairness Real-time system thinking Edge-case reasoning Data structure design You will learn: ✔ Why a DLL is needed ✔ Why PriorityQueue alone is NOT enough ✔ How to design a correct comparator ✔ Line-by-line code explanation in Java ✔ Full dry run with tables ✔ How interviewers evaluate your thinking 🧠 Key Concept: Store tasks in arrival order (DLL) → Decide execution using Priority Queue. 📌 Sample problem covered (Microsoft 2025): Tasks must be processed by: Higher priority first If tie → earlier timestamp If still tie → earlier arrival 📌 Output is derived using a stable ordering mechanism. 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 01:14 – Input Output 01:43 – Strategy 02:37 – Full Code Begins 03:21 – main() Method 03:21 – main() Method 09:29 – Output 09:42 – Outro ━━━━━━━━━━━━━━━ 💡 Connect with me ━━━━━━━━━━━━━━━ If you love clear DSA explanations, subscribe for more. #TaskScheduler #MicrosoftInterview #PriorityQueue #DoublyLinkedList #DSA #JavaProgramming #FAANGPrep #SystemDesign #CodingInterview 👍 If this helped you: Like the video Subscribe for DSA explained clearly Comment “PRIORITY QUEUE” for more problems If this helped you, **LIKE 👍 | SUBSCRIBE 🔔 | SHARE** with your study group!