Microsoft Interview Questions
Practice 197 real Microsoft interview questions for 2026. Covers all top categories — Coding & Algorithms, Behavioral & Leadership, System Design, Machine Learning, ML System Design — across Software Engineer, Data Scientist, Machine Learning Engineer, Product Manager, Technical Program Manager roles. Real questions from actual interviews with detailed solutions. Microsoft interview questions on this page focus heavily on coding and design: expect algorithmic problems, implementation correctness and complexity tradeoffs, and end-to-end system thinking during on-site loops. Interview preparation should combine timed coding drills, low-level and distributed design sketches, and polished STAR narratives that show impact and collaboration. For Software Engineers you’ll see recurring themes like versioned key-value stores, secure Copilot APIs, RAG ranking and retrieval pipelines, CSV/query engines, calendar and meeting-optimizer systems, URL shorteners, and memory/Java/Python management. Data Scientist questions concentrate on SQL aggregation/top-earner queries, classifier design and evaluation, estimating impact without A/B tests, SHAP and precision–recall analysis. Machine Learning Engineers face top-K/top-elements, LLM data quality checks, model selection, caching/merge interval problems, and RAG systems with agentic tools. Product roles emphasize customer obsession, cross-team influence, enterprise process tooling, metrics, and ML pipeline stability.

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"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

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"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

"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."
Find pairs with the minimum absolute difference
Given an integer array (not necessarily sorted), find the minimum absolute difference between any two distinct elements. Return all pairs of values th...
Explain SHAP in an ML System
Describe how you would build an end-to-end machine learning system for a business use case such as churn prediction, ad conversion prediction, or cont...
Describe handling ambiguity and resolving design conflicts
Answer the following behavioral prompts with concrete examples (you can assume a software engineering role): Prompt A — Delivering with little guidanc...
Design quality checks for spreadsheet LLM data
You are given a dataset for a spreadsheet assistant. Each example contains: 1. a natural-language prompt, 2. an Excel-style table or worksheet represe...
Solve cache, grid path, and substring problems
You are given three independent coding tasks. 1) Bounded cache with eviction Design a data structure that stores key–value pairs with a fixed capacity...
Assemble async stream reads into objects
You are implementing a parser in C# that reads a binary stream containing a sequence of records. An interviewer provides these helper functions (you m...
Compute and plot a precision–recall curve
Precision–Recall (PR) curve coding / evaluation You are given a binary classifier’s outputs on a dataset: - y_true: array of true labels in \(\{0,1\}\...
Explain a project deeply
Prepare for a deep technical retrospective on one of your past projects. The interviewer may ask you to explain: - the problem you were solving - your...
Populate next pointers in a perfect binary tree
You are given a perfect binary tree (all leaves at the same level; every internal node has two children). Each node has fields left, right, and next. ...
Find Top K Largest Elements
Given an unsorted integer array nums of length N and an integer k such that 1 <= k <= N, return the k largest elements in the array. If a value appear...
Design a Ticketmaster-like ticketing system
System Design: Online ticketing platform (Ticketmaster-like) Design a system that sells tickets for events (concerts/sports) with seat selection. Core...
Implement rotated array binary search with duplicates
Given an integer array nums that is a non-decreasing array rotated an unknown number of times. Duplicates may exist. Implement a function that returns...
Explain how browser authentication works with JWTs
Explain, at a high level, how authentication typically works in a browser-based web app when using JWTs. Cover: - Where the token is stored (e.g., mem...
Implement a Snapshot Set Iterator
Implement a data structure SnapshotSet<T> with the following interface: `java interface SnapshotSet<T> { void add(T e); void remove(T e); ...
Implement Memory Allocation and In-Memory Records
Solve the following two implementation problems. Problem A: First-Fit Memory Allocator You are given a contiguous block of memory containing n units, ...
Navigate bias, sponsorship, and domain misalignment
Behavioral & Leadership Onsite: Expertise Gaps, Fairness, Sponsorship, and AI Pivot Context You are interviewing for a Software Engineer role. Provide...
Assemble DNA payload strings from tagged fragments
You are given a list of DNA-like fragments. Each fragment is a tuple: - start_tag: string - end_tag: string - payload: string A valid DNA chain is for...
Rotate a 3×3 digit grid by 180°
Problem You are given a 3×3 grid of digits (characters '0'–'9'), represented as an array of 3 strings of length 3. When the entire grid is rotated by ...
Compute and plot a precision–recall curve
You are given model outputs for a binary classifier: - y_true: an array of 0/1 ground-truth labels of length n. - y_score: an array of predicted score...
Implement lower_bound on unknown-size sorted array
Lower Bound in Unknown-Length Nondecreasing Array via API Setup You are given a non-decreasing integer array A of unknown length n. You cannot access ...