Behavioral, why Microsoft, questions to ask
Microsoft screens for growth mindset, customer focus, collaboration ("One Microsoft"), and accountability. Answer in STAR, then one sentence on what you learned. Two minutes max.
Which story for which prompt
| Prompt | Story | The beat they want |
|---|---|---|
| A project you're proud of | Cisco server proposal | Scope, design review, shipped |
| Influence without authority | Cisco proposal, 7 engineers | Reading guide per reviewer, small ask, feasibility gate |
| Ambiguity, learned fast | Cisco telemetry, no fabric knowledge on day one | Read the parsers, asked the agent owners, measured before and after |
| A tradeoff | Nested containers vs VMs, or 60% faster with gates | Speed with proof |
| A failure | Real one: hackathon loss, Share-Pen or PDFSpacer incident, rejected PR check | What you changed after |
| Disagreement | From the design review check | Listened, data, decision, relationship intact |
| Sensitive data | Mashreq policy tools | Boundaries, review, who approved |
| A security decision | No outer Docker socket, negative test | Blast radius |
| Measuring quality | NotionBench | 890 graded runs, execution tests |
Tell me about yourself
Tell me about yourself.
Answer
The 60-second intro on the overview page. Order: school, Cisco in three clauses, bank in one, Atrax in one, the identity hook, done. Do not list hackathons, products, or residencies unless asked about them.Why two degrees?
Answer
Penn State CS in person, IIT Madras data science online, both finishing 2028. The second one gives you the statistics and ML side on top of systems. One sentence, then stop.Why Microsoft, why Security & Identity
Why this team?
Answer
"I keep building systems where software acts on a person's behalf. At the bank I shipped an MCP server that gave every AI tool one API, and the open question was always who is calling and what are they allowed to touch. On Atrax, coding agents deploy apps and provision databases, so the agent needs credentials and I had to decide how scoped they are. Those are identity problems, and this org solves them at the largest scale there is: Entra handles billions of sign-ins a day and just shipped Agent ID for exactly the agent case. I want to learn how that is done properly instead of reinventing it badly."Why Microsoft over a startup, given your products?
Answer
Shipping alone taught you to move fast and own outcomes. What you cannot learn alone is how a system stays correct when a mistake affects a hundred million customers. Security and identity is the place where that discipline is strictest. Then stop; do not apologize for the startup work.What do you know about IDNA?
Answer
Identity and Network Access, the Entra org, led by Joy Chik. Entra ID is the sign-in for Microsoft 365, Azure and most enterprise SaaS, with Conditional Access, MFA and passkeys. Around it: ID Governance (access reviews, lifecycle), External ID for customer-facing identity, workload and managed identities for services, Agent ID for AI agents, and Global Secure Access for zero trust network access. Themes: verify explicitly, least privilege, assume breach, phishing-resistant auth, token theft protection. Ignite is the week after the interview, so "curious what Entra announces at Ignite" is a fine closer.Say "agent identity" in two sentences.
Answer
An AI agent that acts for a user needs its own identity, with permissions scoped to the task and a log of what it did, instead of borrowing the user's full credentials. Otherwise a prompt injection or a bug in the agent has every permission the user has, and you cannot tell afterward which actions were the person's and which were the agent's.Languages and tools (they said they would ask)
What languages do you like and why?
Answer
Go for services: small language, real concurrency, one binary, and it is what the device agents at Cisco were written in. Python for prototypes, data, and tests: the simulator and its fixtures were Python. TypeScript for product work: Atrax and NotionBench. Entra runs largely on C# and .NET, which you have not shipped in, and you would be happy to learn it; the concepts carry over from Go and TypeScript. Give reasons, not a list.How do you use AI tools in your work?
Answer
Honestly and with gates. At Cisco agents worked on independent pieces behind unit tests, end-to-end tests and your review, and you wrote failing tests before accepting a change. You benchmarked eight agent setups in NotionBench because you wanted numbers instead of vibes. On open-source PRs you say so in the description and can explain every line. Rule: the agent proposes, tests and a human decide.The behavioral stories, written out
Tell me about a time you had to influence people without authority.
Answer
S: Intern at Cisco; the simulator modeled a customer server as a single container running the agents directly, so the real install path (package, systemd, container runtime, Kubernetes) was never tested. T: Get seven engineers across software, networking and hardware to agree on a redesign and let an intern lead it. A: Wrote the proposal so each person could read only their part: an executive summary, a decisions table, a reading guide per focus area, fourteen numbered open questions grouped by theme, explicit non-goals. Made the ask small: approve the architecture plus a feasibility gate, not the whole hardware matrix. Ran the reviews, recorded decisions, and split the work into four phases. R: Shipped Linux, containerd, Podman, K3s, software TPM, and ConnectX/BlueField profiles. Learned: people say yes to a small reversible step faster than to a big plan, and a written list of open questions turns arguments into decisions.Tell me about a time you had to learn something fast.
Answer
S: First weeks at Cisco, no prior knowledge of the fabric or the device agents. A healthy simulated fabric logged missing-data warnings nobody had chased. T: Make the environmental data (fans, power, temperature, optics, BMC sensors) real enough that the production agents stopped complaining. A: Read the agents' parsers to learn what they expected, asked each agent's owner one specific question instead of "explain your service," built a measurement harness first (count warning tags before and after), then added fixtures one data family at a time. R: Warnings went to zero on the healthy baseline and the fault scenarios fired correctly. Learned: the parser is the spec; read code before asking people, then ask precise questions.Tell me about a tradeoff you made.
Answer
Two to choose from. (1) Nested containers instead of a VM per simulated server: less fidelity (shared kernel) for far less weight and a design that runs on a laptop; the fidelity boundary was written down, and the VM path was recorded as the fallback if a kernel-specific need appears. (2) Running coding agents in parallel to land a ten-week plan in about four weeks check, accepting the review load in exchange, with unit tests, end-to-end tests and human review as the gates. Pick one, name what you gave up, name how you bounded the risk.Tell me about a failure.
Answer
check Must be real. Candidates: a hackathon you lost and why, a PDFSpacer incident that hit users, a Share-Pen decision you would reverse, an open-source PR that was rejected or needed three rounds. Shape: what you decided, what went wrong, what you changed in how you work (not just "I fixed the bug"), and one example of the new habit paying off. Forty seconds.Tell me about a disagreement with a teammate or reviewer.
Answer
check Best source: the design review. Candidate disagreements from your notes: whether rawctr should be a supported interface, UBI vs full RHEL for the Podman profile, whether K3s belongs in the first milestone, and host-visible BlueField-3 vs an independently managed DPU. Shape: their position and why it was reasonable, your position, the data or prototype that settled it, the decision, and that you still worked well together. If the decision went against you, say so; that is the better story.Tell me about a security decision you made.
Answer
The simulated server needed its own container runtime inside a container. The easy path is to mount the outer Docker socket, which would let one simulated customer server control every other container in the simulation. We rejected it, ran a private runtime inside the server container, and wrote a negative test proving the outer daemon and sibling containers are unreachable from inside. Say "blast radius." Second example if they want another: the software TPM is per server with its own persistent state, never shared, so one simulated device cannot present another's identity.Tell me about a time you focused on the customer.
Answer
PDFSpacer: 1,200 monthly users, you read support mail and fixed what they asked for. Or the bank: the policy tool's users were reviewers, so you sat with them, found that a confident wrong answer was worse than no answer, and made the tool cite the policy passage or refuse. check Pick whichever is true.Where do you want to grow?
Answer
Secure systems design and large distributed services: how a service that millions depend on stays correct under change. You have shipped things alone and in a seven-person review; you have not yet owned a service with an on-call rotation and a threat model, and that is what you want next.What would your Cisco mentor say about you?
Answer
Writes things down, measures before claiming, asks precise questions, and finishes. Then one concrete example (the before-and-after harness). Avoid adjectives without an example.Questions to ask them (two per round)
- What does your team own inside IDNA, and what does an intern project usually look like? Does it ship?
- How is the team thinking about identity for AI agents acting on behalf of users?
- What is the hardest reliability or scale problem your service has right now?
- How do you balance shipping speed with security review on your team?
- What is the stack day to day, and how is live-site handled for interns?
- What does a successful intern look like at the end of twelve weeks?
Day of
- Warm-up at noon ET: Valid Anagram, then Sprint 0 out loud.
- Resume open on a second screen; the ten FILL-IN answers written at the top.
- Open the HackerRank links from the scheduling email five minutes early; camera on; water.
- Between rounds: do not replay round one. Walk for five minutes.