Microsoft

Microsoft Software Engineer System Design Questions

103+ questions from real Microsoft Software Engineer System Design rounds, reported by candidates who interviewed there.

103
Questions
8
Topic Areas
10+
Sources

What does the Microsoft System Design round test?

The Microsoft system design round assesses a candidate's ability to architect scalable systems. Software Engineer candidates are typically asked to design a large-scale service or platform from scratch, covering database choices, API design, scaling strategy, and failure modes.

Top Topics in This Round

Microsoft Software Engineer System Design Questions

Microsoft Hiring Event

Coding Other 2021

Position: E63 Summary: Horrible Interview Experience. All the rounds were 45 mins long and to my surprise each interviewer almost spent 25-30 mins asking behavioral questions - Conflict resolution and Collaboration...

Microsoft SDE-2 Frontend Interview Experience DSA and LLD Rounds

Graph,Binary Tree,Trie,Dynamic Programming,Behavioral,Lld,Frontend 2026

Given 2 rounds for Microsoft last saturday. # Round 1 - DSA Interviewer was friendly and pasted directly a medium-hard level graph question in editor. At this point of time i was literally crying from

Microsoft SDE II Interview Experience - LLD and System Design

Arrays,Heap,Queue,Stack,System Design,Two Pointers,Lld 2026

A breakdown of my recent 3-round interview process at Mircosoft for SDE II. The focus was heavily on Low-Level Design (LLD) and the reasoning behind architectural choices. YOE : Almost 5 years. # Roun

Microsoft SDE2 Interview Experience: System Design and Coding Tips

Arrays,Strings,Sorting,System Design,Behavioral,Two Pointers,Rate Limiter,Lld 2026

I recent completed SDE2 loop and wanted to share my experience, takeways & tips from the interview process. --- - System Design with Senior Engineer - Design a rate Limitter & general questions regard

Microsoft SDE2 Interview Experience: DSA, LLD, HLD and CS Fundamentals

Graph,Heap,Sliding Window,Concurrency,System Design,Oop,Behavioral,Two Pointers,Strings,Lld 2026

I recent completed SDE2 loop and wanted to share my experience. Current Experience - 4.5 year Three rounds happened on Friday as part of the hiring event drive, and the AA happened the following week

Microsoft L65 Senior Backend Ads System Design and Coding Interview

Graph,Sql,System Design,Behavioral,Heap,Ml,Ads,Lld,Distributed Systems 2026

Interview Experience – Senior Backend / Ads / Distributed Systems (5 Rounds) --- ## 🔹 Round 1 – Coding + Ads Fundamentals **Focus Areas:** - Project deep dive - 3–4 behavioral questions - Complete A

Microsoft Senior Software Engineer Loop Interview – What should I prepare?

Onsite,Coding,System Design,Behavioral,Dsa,Preparation 2026

Hi everyone, I’ve been selected for a loop interview at Microsoft for a Senior Software Engineer role, and I’m looking for guidance on how to prepare effectively. I’d really appreciate insights from p

I have a Microsoft SDE 2 interview coming up and wanted to get some recent perspectives before I go in. A bit of context – the role is in the AI and Cloud org. Not sure if that changes the bar or the

I have a Microsoft SDE2 interview loop coming up for a CoreAI team. It’s 4 rounds (System Design, Coding, Behavioral), and **one coding round is explicitly AI-assisted** (they mentioned VS Code + GitH

Microsoft SDE2 onsite interview experience with LLD, HLD, and coding rounds

Graph,Union Find,Lld,System Design,Behavioral,Concurrency 2025

**Profile & Application** * **Role:** SDE-2 at Microsoft * **Experience:** 4.5 Years (Tier 1 College, Product-based firm) * **Process:** Applied via the career portal; all interview rounds were schedu

Microsoft Software Engineer Interview: Technical Rounds & System Design

Graph,Bfs,Binary Search,Arrays,System Design 2025

The second round consisted of two coding problems to be solved within one hour. The first challenge involved finding a specific word in a grid of characters, where the word could be formed horizontall

Microsoft Frontend Engineer Interview and System Design Experience

Matrix,Bfs,Arrays,Sliding Window,Lld,System Design 2025

Q1. Given a 2d matrix `matrix`, find if you can reach from 0,0 to m-1,n-1 cell in given time `T` or not. The grid has some cells blocked, can only move in 4 directions, top/bottom/left/right. Q2. http

Anyone attended the Microsoft hiring drive on 14th Feb, how many rounds were held today. Kindly comments your status. PS: I had attended the hiring drive, as conveyed to me earlier...

For context, I have about 9 years of software engineering experience and I’ve never worked at any of the MAG 7 companies before. I actually failed interviews at Meta, Google, Roblox, Snapchat, and Tik

Microsoft SDE - L60 interview Experience. <1 Year experience.

System Design, Heap, Queue, Hash Table, Distributed Systems, Lru Cache, Trie 2025

Hey Guys, I recently gave Microsoft Interview for L60 role. ***First round:*** The first round was the toughest, the interviewer had like 15 years of experience, and we straight away got to the questi

Microsoft Low Level Design Interview Questions

Lld,System Design,Oop,Concurrency,Arrays,Binary Tree,Trie 2025

I am listing the common low level design questions that you will come across during Microsoft interviews. I have built this list from recent interview experiences of candidates. Apart from LLD, I have

Microsoft Hiring Event Coming Up - What to Expect in Coding & System Design Rounds

System Design, Coding, Preparation, Interview Process 2025

Hey everyone, I have an upcoming Microsoft hiring event and wanted to get some insights from folks who’ve recently gone through the process. The loop includes: • 3 coding rounds • 1 system design roun

Microsoft Full Stack Engineer Interview Questions & Results

Binary Tree,Backtracking,Recursion,System Design,Behavioral 2025

Hi everyone, I've been in this community for a while and appreciate the work y'all do to support each other. I thought I'd give back and share my interview experience with Microsoft. **1st interview**

First Round – 1. Explain current project. 2. Mongo DB vs MySQL.3. Singleton class and its application.4. Print all pairs with given sum[Pseudo code]Second round –1. Given ...

I went through a drive on Jan 10th with Microsoft Developer Division Team (Hyderabad Location). The drive was successful for me as within a week HR confirmed it to me...

What to Expect in the Microsoft System Design Round

The Microsoft Software Engineer System Design round has a specific calibration purpose distinct from other rounds in the loop. Across 103+ verified reports on LeakCode for this exact round type, the consistent expectations: clear scoping of the problem before diving into a solution, explicit reasoning about complexity, structured handling of edge cases, and the ability to discuss trade-offs between two reasonable approaches.

Reports tagged with the System Design round at Microsoft show recurring patterns in difficulty and topic distribution. The System Design round is typically 45-60 minutes; the interviewer is calibrated against a specific rubric. The discriminator between candidates who advance and candidates who do not is rarely the final correctness of the answer. It is the path: did you clarify, did you verbalize your approach, did you handle edge cases, and did you communicate throughout.

How To Prepare for This Specific Round

Filter the questions below to the most recent reports (past 6-12 months). Questions tagged for this exact round type from this exact company at this exact role level are the highest-signal data available. Older reports may reference questions that have since rotated out of the company's pool.

Practice 4-6 representative problems from this set under timed conditions. The goal is not memorization (companies rotate questions); the goal is to internalize the patterns the interviewer typically reaches for and the depth of follow-up to expect. Reports on LeakCode also tag the typical follow-up depth at this round type, which is the discriminating signal between hire and no-hire calibration.

System Design Round Timing and Format

The System Design round at Microsoft typically runs 45-60 minutes. Use the first 2-3 minutes to clarify requirements; you should never start coding or designing without verifying the input/output format, constraints, and edge cases out loud. Use the next 5-7 minutes to verbalize your approach before writing any code. The middle 20-30 minutes are implementation. Reserve the final 10 minutes for testing with concrete examples and discussing optimization or trade-offs.

Time budget discipline is one of the most reliable senior-vs-junior discriminators in this round. Strong candidates verbalize where they are in their budget out loud ("I've used about 20 minutes, I have 15 minutes left for testing and one optimization"). This signals engineering maturity to the interviewer and creates positive feedback they can capture in writing.

Common Failure Modes in This Round

Reports tagged "no hire" at Microsoft Software Engineer System Design commonly cite: coding silently without verbalizing approach, jumping to implementation before clarifying requirements, missing edge cases (empty input, single element, very large input), producing working code that the candidate cannot refactor when asked, and failing to test their solution with concrete examples before declaring done.

The single most predictive failure mode in 2025-2026 reports: not asking clarifying questions. Interviewers at all FAANG companies are explicitly trained to weight this dimension. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's notes.

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