Interview prep · Microsoft jobs

Microsoft Infrastructure interview questions

69 interview questions for Infrastructure roles at Microsoft, written from Microsoft’s 8 current postings on its own careers page. These are what the postings say to prepare for — not questions Microsoft has asked.

Built 2026-10-13

Three of the questions

  1. Walk me through how you'd architect PCIe firmware for a DPU where device security is a primary design goal. What threat vectors are you specifically defending against at the firmware level, and how does that shape your design choices?
    Technical depth · from the posting: “Architect and design PCIe firmware for the DPU with an emphasis on device security Develop, maintain and debug PCIe issues, including use of protocol analyzers”
  2. You're debugging a PCIe issue on the DPU using a protocol analyzer and you see intermittent completion timeouts under load, but the device works fine at idle. Walk me through how you'd isolate the root cause.
    Scenarios & troubleshooting · from the posting: “Develop, maintain and debug PCIe issues, including use of protocol analyzers”
  3. Tell me about a time you had to mentor or provide technical feedback to another engineer on a complex system design. What made it hard, and how did you approach it?
    Behavioural · from the posting: “Mentor the team members”
See 11 questions free How interview prep works

What the full prep holds

  • Common questions · 8
  • Your background · 3
  • Quick-fire technical · 29
  • Technical depth · 12
  • System design · 5
  • Scenarios & troubleshooting · 6
  • The company & the problem · 3
  • Behavioural · 3
  • Questions to ask them · 3

A free account shows the 8 common questions and the 3 above. Basic and Elite show every question with how to answer it; Elite also writes your own answers from your resume. See plans.

The Microsoft postings it is written from