Microsoft Interview Guide

Role: Software Engineer

Microsoft's SWE intern interview is relatively straightforward compared to other big tech companies, but difficulty is notably variable — you might get 2 LC easies or a hard graph problem depending on the team and interviewer.

Process Overview

OA (HackerRank): 2 LC-style problems, easy to medium. Some roles have seen a simple regex/string filtering problem. Usually straightforward — candidates report it as one of the easier big-tech OAs.

Finals: 2 back-to-back 45-minute interviews with a 15-minute break between them. Each round mixes behavioral + resume + one coding problem.

Difficulty is genuinely RNG. Reported problems include: reverse a linked list (easy), max product subarray variation (medium), sliding window (easy), wildcard matching (medium-hard), hard DFS/BFS graph pathfinding, and even a LRU cache design. Study broadly rather than optimizing for one difficulty level.

Technical Round Details

Coding (30 min): One problem per interview. Can be LC-style, low-level design (LRU cache, queue from linked list, bitmap), or even a system design discussion. No fixed pattern — be ready for anything.

Behavioral (15 min): Resume walkthrough + situational questions. Sample questions from candidates:

• "If your teammate approached a problem differently from you, how would you handle it?"
• "Tell me about a time you had work that depended on another person."
• "Why Microsoft? Why this team?"

Firmware/Low-Level roles: Significantly different. Expect OS and networking trivia (what is a MAC address, how does a NIC work, what is a cache), plus design questions like LRU cache, implementing a queue with a linked list, or designing a bitmap struct with set/clear/wipe APIs. C knowledge is required.

Tips from Candidates

• Neetcode 150 > tagged questions. Microsoft's tagged LeetCode questions don't reflect the actual interview randomness well. Broad fundamentals are more reliable prep.
• Prepare behavioral stories. Behavioral counts as roughly half the interview. Microsoft interviewers take "how you work with others" seriously.
• Verbalize your thought process. Even if you don't immediately know the optimal solution, walking through your reasoning shows problem-solving ability.
• AI/low-level knowledge matters for specific teams. The Explorer program (for sophomores) is generally easier. Firmware, gaming studios, and infrastructure teams have more specialized questions.

Roles and Variation

Common Mistakes

• Over-indexing on a specific difficulty — be ready for both easy and hard
• Weak behavioral prep — this is half the interview
• Not asking clarifying questions before diving into code
• For firmware roles: not reviewing OS fundamentals (virtual memory, caching, scheduling)