EPFL Master’s Interview Questions for Indian Students 2026

Reviewed by Saumitra Rajput

Founder, Kadamb Overseas · 14+ years Europe education expertise · Ahmedabad

Last reviewed: May 23, 2026

[OK] Verified accurate for 2026

🕑 21 min read

Table of Contents

1. When EPFL Interviews Happen and Who Gets Called

2. The EPFL Interview Format (Real Structure)

3. Five Real EPFL Interview Questions for Indian Engineers

4. Question 1: Technical Depth — Walk Me Through Your BTech Project

5. Question 2: Research Fit — Which EPFL Lab Excites You and Why

6. Question 3: Ethical Scenario — Your Dual-Use Research Dilemma

7. Question 4: Why EPFL Not ETH Zurich

8. Question 5: Five-Year Plan After EPFL

9. What NOT to Say in an EPFL Interview

10. How to Talk About IIT, NIT, BITS, IIIT Projects

11. How to Handle Questions on Weak Semester Grades

12. What EPFL Professors Actually Look For

13. Interview Decision Timeline (Day-by-Day)

14. Before-Interview Checklist (Zoom, Slides, Papers)

15. The 12-Week EPFL Interview Preparation Calendar

16. Frequently Asked Questions

When EPFL Interviews Happen and Who Gets Called

EPFL — École Polytechnique Fédérale de Lausanne — is one of two Swiss federal technology institutes, alongside ETH Zurich. It does not interview every Master’s applicant. Of the roughly 8,000 Master’s applications EPFL receives each year, only the top 600-800 are invited to interview — approximately 8-10% of the applicant pool. Indian applicants make up around 12% of the international applicant pool, which means roughly 80-100 Indians are interviewed each cycle.

Interview invitations typically arrive between March 15 and April 30 for the September intake. The invitation email comes from the specific section coordinator (Computer Science, Microengineering, Communication Systems, Data Science, etc.) and includes a Calendly-style booking link for a 15-30 minute Zoom slot. Some EPFL sections (notably Computer Science and Communication Systems) interview every Indian candidate above the 8.5 CGPA threshold; other sections (Civil Engineering, Materials Science) interview only the top 20-30 internationals.

We at Kadamb Overseas, headquartered in Ahmedabad, have prepared dozens of Indian engineers for EPFL interviews since 2014. The consistent observation: interview invitations are not a sign that admission is guaranteed. Roughly 40-50% of interviewed Indian candidates receive offers. The interview is genuinely the deciding round — not a formality. For deeper preparation on the EPFL application timeline itself, see our companion article on September 2027 European Master’s intake timeline for Indians.

Why EPFL interviews and ETH Zurich does not

ETH Zurich does not interview Master’s candidates as a standard part of its admission process; it relies on dossier review and the transcript. EPFL’s interview policy reflects a different selection philosophy: EPFL’s smaller cohort sizes (40-90 per Master’s section versus ETH’s 60-120) mean each candidate has higher seat-cost, and EPFL faculty believe interviews surface candidates whose written application understates their potential. For Indian engineers from IIT or NIT, this is good news — the interview lets you correct any weak phrasing in your written SOP.

The EPFL Interview Format (Real Structure)

EPFL interviews are standardised across sections, with minor variation in research-question depth. The format is:

The panel composition is typically two or three professors: the section admissions chair plus one or two faculty members whose research aligns with your stated interest. In rare cases (Computer Science MA, certain interdisciplinary programmes), a PhD student or postdoc joins the panel. The interview is conducted in English; French language ability is never tested unless the Master’s programme explicitly requires French (which most do not).

Slide deck — required or not?

For most EPFL sections, slides are not required and not requested. The exception is the Computational Science and Engineering Master’s, where the chair sometimes asks you to share a 3-slide deck on your most significant project. Always confirm in the invitation email whether slides are expected. If invited, prepare three slides: (1) project context and your role, (2) the technical method and one figure, (3) the outcome and what you would do differently.

Where the camera matters

Use a desktop or laptop, never a phone. Ensure your face is well-lit (window or ring light in front of you, not behind), camera at eye level, neutral background. Indian candidates who interview from low-bandwidth locations should book a co-working space or hostel room with reliable fibre — choppy video makes faculty assume choppy thinking.

Five Real EPFL Interview Questions for Indian Engineers

These five questions, in some variant, appear in 80%+ of EPFL interviews for Computer Science, Data Science, Communication Systems, Robotics, and Microengineering sections, based on debriefs from Kadamb-coached candidates over the 2022, 2023, 2024, and 2025 cycles.

Other questions surface — “How would you reproduce a paper you have not read,” “Explain a recent ML/networking/biotech breakthrough you followed,” “What would you do if your assigned thesis supervisor took sabbatical mid-year” — but the five above are the bedrock.

Question 1: Technical Depth — Walk Me Through Your BTech Project

This is the longest question in the interview and the single biggest determinant of outcome. Faculty want to see whether you can explain a complex technical artefact at three levels — overview, method, limitations — within a structured 4-5 minute narrative.

Model answer framework (4-5 minutes)

Opening (45 seconds): Project title, your role, team size, duration, supervisor’s name, and the specific problem statement. Example: “My BTech thesis at IIT Bombay was on graph-neural-network-based traffic prediction for Mumbai’s BEST bus network. I worked solo under Prof. Manoj Apte over eight months, predicting bus arrival times across 410 stops using historical GPS traces.”

Method (2 minutes): The architecture, the dataset, the training procedure, and the baseline you compared against. Mention one technical detail that signals depth — a specific loss function, an attention mechanism, a regularisation choice — without showing off jargon. Example: “I built a GraphSAGE encoder over the road-network graph with stop-level temporal embeddings, trained on six months of GPS pings sampled at 30-second intervals. The baseline was a Kalman filter and a vanilla LSTM. My loss function was a weighted Huber loss biased toward rush-hour samples.”

Result and reflection (1 minute): The performance improvement, and one honest limitation. Example: “I achieved 14% lower MAE than the LSTM baseline at peak hours. The limitation is that the model degrades sharply during monsoon flooding because the training set has only one monsoon’s worth of GPS data. If I were to extend it, I would add weather-conditioned attention as a side feature.”

Why this leads to EPFL (45 seconds): Tie the project to your intended EPFL research direction. Example: “This work surfaced limits in temporal graph modelling under distribution shift. Prof. Volkan Cevher’s machine-learning group at EPFL works on exactly this — distributionally robust optimisation — and the EPFL Master’s coursework in Convex Optimisation and Statistical Learning would let me approach the monsoon-shift problem with the right theoretical tools.”

What faculty will probe

Expect follow-ups: “Why GraphSAGE and not a Graph Attention Network?” “How did you tune the temporal embedding dimension?” “What was your evaluation split — random or temporal holdout?” Have answers for the three or four most likely follow-ups. If you do not know an answer, say “I did not test that specifically — my intuition is X, but I would want to verify” — never guess.

Question 2: Research Fit — Which EPFL Lab Excites You and Why

This question separates candidates who applied to EPFL by reputation from those who applied for specific reasons. EPFL has roughly 350 research labs across schools (IC, STI, ENAC, SB, SV, CDM). You need to name two or three specific labs and what specifically about each one’s recent work appeals to you.

Model answer (90 seconds)

“Three EPFL labs align with my interests. First, the Machine Learning and Optimization Laboratory under Prof. Martin Jaggi — his 2024 work on federated learning under heterogeneous client distributions directly extends my BTech work on traffic prediction under distribution shift. Second, the Information and Network Dynamics group under Prof. Patrick Thiran — their work on epidemic spreading on networks parallels my interest in graph-based modelling. Third, the Distributed Computing Lab under Prof. Rachid Guerraoui — the recent paper on Byzantine-robust federated averaging would be the bridge between my systems background and my ML interests. Of the three, Prof. Jaggi’s lab is my first choice for a semester project and potential thesis.”

This answer names three specific faculty, references one specific recent paper per lab, and ranks the choice rather than vaguely admiring all of them.

How to research EPFL labs before the interview

Use the EPFL Schools website (epfl.ch → Research → Labs) to get the full lab directory. For each lab on your shortlist, read at least one 2024-25 publication on Google Scholar. Note the lab’s website URL — sometimes the EPFL central directory is outdated. Save 4-6 lab pages to read offline the night before the interview.

For comparison with other top European technical universities Indian engineers should know about, see our IIT/NIT to ETH/TU Munich transition paths article, which covers the ETH and TUM equivalents.

Question 3: Ethical Scenario — Your Dual-Use Research Dilemma

This question appears in roughly 60% of EPFL interviews, especially for Computer Science (cybersecurity, ML), Robotics, and Communication Systems candidates. Swiss academic culture takes dual-use research ethics seriously — Switzerland has historically been a hub for both humanitarian-tech (ICRC, Médecins Sans Frontières analytics) and surveillance-tech debates.

Sample ethical question

“Imagine you publish a face-recognition algorithm with state-of-the-art accuracy and an authoritarian government adopts it for citizen surveillance. What is your responsibility as the researcher?”

Model answer framework

Do not duck the question with “I would not publish it.” Faculty want to see structured ethical reasoning, not avoidance.

“I would distinguish between technical responsibility and policy responsibility. Technically, my responsibility is to follow the EU Trustworthy AI guidelines: document training-data biases, evaluate accuracy across demographic subgroups, and release a model card with intended-use boundaries. Policy responsibility is harder — once an algorithm is in the open-source ecosystem, downstream misuse is difficult to prevent. My approach would be (a) publish with a non-commercial research-only license like CC-BY-NC-SA, (b) collaborate with NGO partners like Access Now or AlgorithmWatch to monitor deployments, and (c) publicly disengage from any project I see being misused. I would not refuse to publish — that would just delay capability proliferation by 12-18 months, since competing groups are working on the same problem. But I would not pretend the publication is value-neutral.”

This answer signals (1) familiarity with relevant policy frameworks (EU AI Act, model cards), (2) intellectual honesty about the limits of individual researcher control, and (3) a practical action stance rather than a moralistic refusal.

Variants of the ethical question

Question 4: Why EPFL Not ETH Zurich

This is the trap question. Bad answers fall into three categories: (a) “EPFL is in French Switzerland and I want to learn French” (the Master’s is in English, French is irrelevant); (b) “ETH is too competitive” (signals lack of confidence); (c) “EPFL is more international” (factually weak — ETH is also highly international).

Model answer (60 seconds)

“Three reasons. First, EPFL’s School of Computer and Communication Sciences has a tighter integration with the SwissTech innovation park — the proximity to startups like Logitech, Nestlé Research, and the Swiss Data Science Center matters for my goal of bridging research and industrial deployment. Second, EPFL has Prof. Volkan Cevher’s lab on distributionally robust optimisation, which is closer to my BTech work than any ETH lab I have identified. Third, EPFL’s Master’s allows two semester projects plus a thesis, which gives me 18 months of supervised research before specialising — ETH’s structure is heavier on coursework in the first year. None of this is to say ETH is weaker; both are excellent. EPFL’s specific structure and faculty fit me better.”

The answer is honest (“none of this is to say ETH is weaker”), specific (named lab, named structure feature), and personal (tied back to your stated research interest).

For a deeper Swiss-versus-Switzerland comparison of higher education options, our Luxembourg vs Switzerland for higher studies article unpacks the financial and academic trade-offs Indian students face.

Question 5: Five-Year Plan After EPFL

EPFL admits 40-90 students per Master’s section. The cohort is investment-intensive. Faculty want a 5-year plan that justifies the investment.

Three acceptable plan archetypes

Industry track: “Years 1-2: thesis with Prof. Jaggi, internship at Google Zurich. Year 3: Research Engineer at Google Zurich or Meta Paris on production federated learning. Years 4-5: Senior Research Engineer at a privacy-tech startup, potentially relocating to Bangalore to build an India R&D office.”

PhD track: “Years 1-2: EPFL Master’s with two semester projects under Prof. Jaggi and Prof. Cevher. Year 3: PhD at EPFL or ETH on distributionally robust ML under non-stationary data. Years 4-5: PhD progression with a focus on publishing at NeurIPS and ICML, then a postdoc at MILA or MIT before considering Indian academic positions at IISc or IIT Bombay.”

Hybrid track: “Years 1-2: EPFL Master’s plus part-time research engineer at IDIAP. Year 3-4: ETH Zurich PhD with industrial co-supervisor at Disney Research. Year 5: spin-off founder or industrial research lab head at a Swiss or Indian fintech.”

Each archetype has named labs, named companies, named cities. Do not say “I want to work in big tech and maybe do a PhD later.” Vagueness is the killer.

For the practical work-visa pathway after the Master’s, see our companion EU Blue Card guide for Indian Master’s graduates and our breakdown of European Master’s to FAANG Europe paths.

What NOT to Say in an EPFL Interview

These are the eight phrases and topics that consistently sink Indian candidates in EPFL interviews.

Replace each with a specific, candidate-side, work-focused sentence. The interview is a 20-minute window to demonstrate you can hold a peer-to-peer technical conversation with EPFL faculty — not a job-fit assessment.

The cultural translation Indian engineers need

Indian university culture rewards humility and deference to senior faculty. EPFL interview culture rewards confident peer-positioning. You are not interviewing for a job; you are demonstrating you can co-author papers with these professors in two years. Speak as a junior collaborator, not as a student-petitioner. This is a hard tone shift for many candidates from IIT, NIT, BITS, and IIIT backgrounds. Practice it explicitly in mock interviews.

How to Talk About IIT, NIT, BITS, IIIT Projects

Most EPFL faculty know the rough hierarchy of Indian institutions but may not know specifics. Always contextualise briefly.

One-sentence institutional contexts

One sentence is enough. Do not lecture the panel on Indian higher education. The objective is to anchor your credential, not to defend your country.

Project framing rules

When describing a BTech or MTech project, always include: supervisor’s name, project duration, team size, your specific contribution (what you wrote, what you measured), and the outcome. Indian academic project descriptions often understate individual contribution because of cultural humility — make sure the panel understands which line of code, which figure, which decision was yours.

How to Handle Questions on Weak Semester Grades

If your CGPA has a visible dip in semesters 5 or 6, faculty will ask. Have a 30-second answer ready.

Acceptable framings

“My fifth-semester GPA dropped to 7.4 because I spent that semester building [internship product / open-source contribution], and I made a deliberate trade-off. Semesters 6 through 8 returned to 8.6+, and my final-year thesis grade was A.”

“Sixth semester included a documented family health situation that I have referenced in my application. Performance recovered fully in subsequent semesters.”

“That semester I took two graduate-level courses for which I was underprepared. I learned which prerequisites I lacked and self-studied them over the next break. My subsequent ML and statistics courses scored A+.”

Unacceptable framings

“I had a tough year.” (No specificity)

“My professor was unfair.” (Blame-shifting)

“I was distracted by relationships.” (Personal oversharing)

“Indian universities are difficult.” (Disparaging context)

Every weak-semester answer should signal three things: ownership, learning, and recovery.

What EPFL Professors Actually Look For

In 12+ years of debriefing Kadamb-coached candidates after EPFL interviews, Saumitra Rajput has observed that selection professors weigh four dimensions roughly equally — and curiosity outweighs polish.

A candidate who fumbles one technical follow-up but recovers with “Let me think for ten seconds — I would approach it as…” scores higher than a candidate who answers smoothly but with shallow content. Faculty understand that you are 21-22 years old and will not know everything. They are testing how you think under pressure, not what you already know.

The “curiosity over polish” rule

If you have to choose between sounding rehearsed and sounding curious, choose curious every time. Pauses are acceptable. Asking the panel to clarify a question is acceptable. Admitting you do not know an answer is acceptable. What is not acceptable is bluffing or giving a polished but generic answer that could apply to any university.

Interview Decision Timeline (Day-by-Day)

EPFL final decisions usually arrive by mid-April for the September intake, giving candidates roughly 4-5 months before the academic year starts in mid-September. For the Schengen visa step, see our Schengen Student Visa 2026 guide for Indian students.

Before-Interview Checklist (Zoom, Slides, Papers)

Twenty-four hours before the interview, work through this checklist. Indian candidates routinely lose 2-3 points on perceptions of “preparedness” by skipping the basics.

Tech checklist

• Test Zoom on the actual device you will use; update the Zoom app
• Test camera lighting at the actual time of day (Swiss morning = Indian afternoon)
• Test microphone with headphones — wired is more reliable than Bluetooth
• Backup internet (mobile hotspot ready)
• Quiet room booked; sign on door
• Phone on silent and out of sight

Document checklist

• One-page CV in PDF, named “[YourName]_CV_EPFL.pdf”
• BTech transcript scanned PDF
• Two-page summary of your BTech thesis or major project
• List of 4-6 EPFL labs you have researched, with one recent paper per lab
• Three pre-prepared questions for the panel (see below)

Three questions to ask the panel

1. “What does a typical first-year Master’s student’s research load look like alongside the coursework — would I have time for one semester project alongside the core courses?”

2. “How does the Section help international students who arrive without French — are administrative interactions in English smooth in the first six months?”

3. “What are the typical pathways for Master’s students into the EPFL PhD programme — is the bar primarily thesis quality, faculty endorsement, or coursework grades?”

These three questions are specific, candidate-side, and signal serious intent. Do not ask about salaries, the city of Lausanne’s nightlife, or visa logistics — those are handled elsewhere.

The 12-Week EPFL Interview Preparation Calendar

Twelve weeks is the gold standard for EPFL interview preparation if you are starting from scratch. Six weeks is the realistic minimum.

Week 1-2: Research EPFL labs

Read the EPFL Schools website end to end for your section. Shortlist 8-12 labs. Read one 2024-25 publication per lab. Maintain a spreadsheet with lab name, faculty, research area, recent paper, why it matters to you.

Week 3-4: Rebuild your BTech project narrative

Write a 5-minute spoken narrative of your major project. Record yourself on phone, listen, refine. Practice three follow-up questions per technical claim (“Why GraphSAGE not GAT?” “Why Huber loss?” “Why temporal holdout?”)

Week 5-6: First mock interview round

Find a senior — ideally a PhD student or industry researcher — to conduct a 30-minute mock interview. Get specific feedback on filler words, technical depth, fit narrative. Kadamb runs paid mock interviews with EPFL alumni — WhatsApp +91 96876 88776 to book.

Week 7: Ethical scenarios drill

Practice three ethical scenarios out loud. Time yourself — answers should be 90-120 seconds, structured (acknowledge, frame, propose action, qualify).

Week 8: Why-EPFL drill

Write and rehearse three versions of the “Why EPFL not ETH” answer, each 60 seconds, each with different specifics (faculty-focused, structure-focused, ecosystem-focused). Be ready to deploy whichever fits the flow.

Week 9: Second mock interview round

Different reviewer, same drill. Compare feedback from both reviewers — what remains consistent is the real issue.

Week 10: 5-year plan refinement

Write three versions of the 5-year plan (industry, PhD, hybrid). Pick one based on which most authentically matches your current trajectory.

Week 11: Final mock with EPFL alumni if possible

This is the highest-value mock. EPFL alumni replicate the panel dynamic. Ask brutally honest feedback.

Week 12: Logistics and rest

Final tech check, sleep schedule adjustment (Lausanne is 3.5 hours behind India), light review only. Do not cram new content in the final 48 hours.

For candidates preparing applications to multiple Big-8 country destinations simultaneously, our Erasmus Mundus 2026 guide for Indian students covers the multi-track preparation strategy.

Frequently Asked Questions

Ready to Crack Your EPFL Interview?

Saumitra Rajput and the Kadamb Overseas team have prepared Indian engineers for EPFL interviews since 2014, including Computer Science, Communication Systems, Data Science, Microengineering, and Robotics sections. Our 60-minute mock interview package includes a recorded mock with an EPFL alumnus, written feedback on technical depth and fit narrative, and a follow-up coaching call. We are headquartered in Ahmedabad and serve candidates across Mumbai, Delhi, Bangalore, Hyderabad, and Chennai via Zoom.

WhatsApp us at +91 96876 88776 to book a mock interview or use our contact form for a full Switzerland application package. To explore Switzerland’s other top universities and Master’s options, browse our Switzerland country guide and our Big 8 country guide hub.

About the Author

Saumitra Rajput

Founder & Europe Education Specialist | Kadamb Overseas Pvt. Ltd.

Saumitra Rajput is the founder of Kadamb Overseas Pvt. Ltd., India's leading Europe-focused study abroad consultancy based in Ahmedabad. With 14+ years of expertise in European education, he has personally counselled 2,500+ Indian families and helped 500+ students secure admission to top European universities including TU Munich, ETH Zurich, EPFL, KU Leuven, HEC Paris, Sapienza Rome, TU Wien, and Warsaw University of Technology. He has visited 25+ European universities, partners with 250+ EU institutions, and maintains a 97% visa success rate.

14+ Years Europe Education500+ Students Placed97% Visa SuccessDAAD ExpertCharpak Scholar MentorEPFL/ETH Admissions CoachItaly DSU SpecialistSchengen Visa Expert

💬 WhatsApp Saumitra📞 +91-99133 33239✉️ EmailView full profile

Planning to Study Abroad?

Get free expert guidance from our experienced counselors

Preferred CountryGermanyFranceItalyAustriaIrelandLithuaniaUnited KingdomAustraliaSwitzerlandNetherlandsOther Get Free Consultation

Saumitra Rajput

Saumitra Rajput is the founder and lead counsellor at Kadamb Overseas, India's trusted Europe education consultancy based in Ahmedabad. With 14+ years of hands-on experience, he has personally guided 500+ students to universities across Germany, Switzerland, France, Italy, Austria, and Spain. Saumitra has visited partner universities across Europe, holds deep expertise in European visa processes, scholarships, and student life, and has achieved a 97% visa success rate for his clients. He is the host of the YouTube channel "Europe with Saumitra", where he shares first-hand insights on studying and living in Europe. His mission: make Europe accessible to every Indian student, with zero consultancy fees.

Related Articles

• How to apply for university in USA for international students
• Top 10 Benefits of Moving to Australia from India in 2026
• Study BBA without IELTS in France – Full Guide 2026
• Salary After Masters in France – What Indian Students Can Expect
• University College Absalon: Tuition Fees & Scholarships