Microsoft Software Engineer Interview Questions
Microsoft Software Engineer interview questions typically emphasize algorithmic problem solving, clear coding, and effective communication more than trivia. What’s distinctive is the blend of timed coding rounds that test data structures and algorithms, role-appropriate design questions (object‑oriented or system design for senior levels), and behavioral threads woven through every conversation. Interviewers look for clean, testable code, complexity trade‑offs, debugging and testing habit, and evidence you can collaborate under pressure. Good interview preparation therefore balances technical practice with storytelling and clarity. Expect a staged process: resume/recruiter screen, an online or phone technical assessment, then a loop of 4–5 interviews (45–60 minutes each) that may include coding, design, and behavioral evaluation; some candidates also meet a final senior reviewer. To prepare, practice timed coding in a plain editor, rehearse system design sketches and trade‑offs, and develop concise STAR stories showing ownership and impact. Focus on fundamentals (arrays, trees, graphs, complexity, basics of systems), narrate your thought process, ask clarifying questions, write and test simple examples, and debrief after mocks to iteratively improve.

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"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Implement concurrent structures and debug queue code
The coding rounds covered several implementation and debugging tasks: 1. Implement an LRU cache that supports get(key) and put(key, value) in constant...
Solve binary-search knapsack & graph shortest path
Question Given a sorted list of items, design an efficient solution (using binary search) to achieve the target objective instead of a dynamic-program...
Count k for consecutive-sum generator
An array generator service produces a consecutive-integers array starting at a positive integer k: [k, k+1, ..., k+m−1] for some m ≥ 1. The service re...
Merge multiple sorted arrays using min-heap
Problem You are given k sorted arrays of integers: - arrays[0], arrays[1], ..., arrays[k-1] - Each arrays[i] is sorted in non-decreasing order. - The ...
Reconstruct DNA from tagged fragments
You are given a list of DNA fragments. Each fragment is represented by a Sequence object containing two endpoint labels and a DNA string payload. Your...
Implement a type-based mutex for tasks
Problem You are given a multithreaded task runner. Each task has: - task_id: int - task_type: "gen" | "score" - duration: int (seconds) Each task runs...
Check palindrome and find next larger palindrome
Problem: Palindrome Check + Next Larger Palindrome Part 1: Palindrome validation Given a string s, determine whether s is a palindrome (reads the same...
Design an online ticket booking system
System Design: Online Ticket Booking System Design an online ticket booking system that allows users to discover events and book tickets. Assume the p...
Identify the Extra Directed Edge
You are given a list of directed edges edges, where each edge is represented as [parent, child]. The graph contains nodes labeled from 1 to n, and it ...
Solve load balancing and perfect pairs
1) Contiguous load balancing: You have n identical resources (servers) and m ordered tasks with processing times burstTime[0..m-1]. Each server must b...
Design a resource change tracking database
Scenario You are building part of an Azure-like cloud control plane. Resources (VMs, networks, storage accounts, etc.) are stored as JSON documents an...
Solve three scheduling and array problems
In this round you are given three separate coding problems to solve. --- Problem 1: Schedule tasks with cooldown You are given: - A list of tasks, whe...
Design local sports team recommendation system
Design a recommendation system that suggests local sports teams to users. High-level requirements: - Recommend sports teams that are relevant to a use...
Find lowest common ancestor in tree
You are given the root of a binary search tree (BST) and two distinct nodes p and q that are guaranteed to exist in the tree. Task (BST case): - Find ...
Design an image upload/download service
System Design: Image Upload and Download Service Context Design a production-grade image service used by web and mobile clients. The service must supp...
Find max consecutive elements with sum below target
You are given: - An integer array nums of length n, sorted in non-decreasing order. - An integer index such that 0 ≤ index < n. - An integer target. S...
Find maximum collinear points
Given a list of 2D points with integer coordinates, return the maximum number of points that lie on the same straight line. Input - points: a list of ...
Stream output until stop token appears
You are implementing a simplified streaming conversational AI output filter. Text arrives in chunks (strings) in order. There is a special stop token ...
Implement a sliding-window rate limiter allow()
Problem Implement a sliding-window log rate limiter. Design a class RateLimiter initialized with: - maxRequests (e.g., 100) - windowMillis (e.g., 60_0...
Implement a Tic-Tac-Toe game class
Problem Implement a class that supports playing an n × n Tic-Tac-Toe game. Requirements Create a class TicTacToe(n) with: - move(row, col, player) -> ...