What product designer interviews test
- Product sense: improving or inventing a product on the spot
- End-to-end ownership, from discovery to shipped work
- Trade-offs between user needs, business goals and feasibility
- Design systems and consistency at scale
- A deep portfolio review and a whiteboard or app design challenge
The 110 questions below cover 18 portfolio, 31 behavioral, 42 design challenge, 17 app critique, 2 research questions. The first 10 are questions candidates report being asked. The rest are practice questions in the same style, sorted from level 1 to level 10.
How to answer each type of question
- PortfolioPick one project and tell it as a story: the problem, your role, the options you weighed, what shipped and what changed. Interviewers are checking that you can separate your decisions from the team's and that you know the outcome.
- BehavioralAnswer with one specific situation, not a philosophy. Say what was at stake, what you did, what happened and what you would do differently. Two minutes, then stop and let them dig.
- Design challengeDon't jump to screens. Clarify the goal and the user, name the problem, set a success metric, then sketch one direction and its trade-offs. The whiteboard challenge guide walks through it stage by stage.
- App critiqueStart with who the product is for and what it is trying to do, then judge it against that. Say what works before what does not, back each point with a user need or principle, and finish with the one change you would ship first.
- ResearchShow that the question picks the method, not habit. Say what you need to learn, how you would learn it, from whom, and which decision the findings would change.
Questions candidates report being asked
Collected from candidate reports on Glassdoor, Reddit and Levels.fyi, including Meta, Google, Amazon, Microsoft, Airbnb loops. Not confirmed by the companies.
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01
Walk me through a product you designed end to end. What would you do differently now?
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02
How do you balance user needs with business goals?
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03
Design a feature that increases engagement on Instagram.
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04
Tell me about a time a design you shipped failed. What did you learn?
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05
How do you work with PMs who don't understand design value?
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06
Redesign the checkout experience for Amazon to reduce drop-off.
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07
How do you contribute to or build a design system?
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08
What metrics do you use to measure the success of a design?
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09
Design a way for Airbnb hosts to manage multiple listings easily.
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10
How do you get buy-in from stakeholders on a design direction they initially rejected?
Practice questions by level
100 practice questions, 10 levels from foundations to expert. If you're early in your career, start at level 1. If you're interviewing for senior roles, levels 7 to 10 are where the loop will go.
Level 1 · Foundations
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11
Walk me through a project you're proud of. What problem did it solve and how did you approach it?
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12
Critique the Spotify mobile app — what works well and what would you improve, and why?
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13
What tools do you use in your design workflow and why did you choose them over alternatives?
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14
What is visual hierarchy and how does it affect how users absorb information on a screen?
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15
Describe your design process from brief to handoff. What steps do you take and what deliverables do you produce?
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16
What is the difference between a wireframe, a mockup, and a prototype? When would you use each?
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17
What does cross-functional collaboration mean to you as a designer? Walk me through how you work with a PM and an engineer on a feature from kick-off to handoff.
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18
Design the three key screens for a simple to-do app. How do you decide what to include on each screen and what to leave out?
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19
Critique the Google Search results page on mobile. What works well and what single change would have the most impact?
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20
Walk me through a project where you had to design for two completely different types of users on the same screen.
Level 2 · Foundations
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21
How do Gestalt principles apply to UI layout? Walk me through at least three principles with product examples.
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22
Critique the Amazon shopping cart and checkout flow on mobile. What friction points exist and what would you fix first?
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23
Design a simple onboarding flow for a personal finance app targeted at college students. What three screens are essential?
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24
What is a design system? Name two components every design system must include and explain what problem they solve.
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25
How do you decide between dark mode and light mode defaults for a new product?
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26
How do you communicate your design rationale to an engineer who disagrees with your interaction choice and has a technical alternative?
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27
Design the push notification strategy for a meditation app. How do you avoid notification fatigue while maintaining daily habit reinforcement?
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28
Critique the Uber ride-booking flow from opening the app to the moment the driver is confirmed. Where is the highest friction?
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29
Show me a project where your final design was dramatically different from your initial concept. What was the catalyst for the change?
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30
How do you prioritise which design review feedback to action and which to deprioritise when you have 40 comments and two days?
Level 3 · Foundations
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31
Design a feature for Instagram that helps users discover local events near them without leaving the app.
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32
Tell me about a portfolio project where you had to balance user needs against a tight technical constraint. How did you solve it?
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33
Critique the Google Maps mobile app. What interaction patterns work well and what would you prioritise changing?
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34
Design an empty-state screen for an Amazon seller analytics dashboard when no data has been loaded yet.
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35
How would you use AI-powered features responsibly in a consumer health app? What guardrails would you design?
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36
Design the 'Share Live Trip' feature for Google Maps that lets users share their route and ETA in real time. What are the essential interaction states?
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37
How do you balance moving fast with maintaining quality when a PM wants to ship in one sprint but the design needs more time?
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38
Tell me about the most technically constrained project you've worked on. How did the constraint change what you designed?
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39
Critique the Netflix content browsing experience. Why do subscribers report paralysis despite having access to thousands of titles?
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40
Design the 'Saved Items' and 'Recently Viewed' experience for a fashion e-commerce app with personalisation. How do these two surfaces coexist without confusion?
Level 4 · Intermediate
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41
Design a 'Save for Later' feature inside the Airbnb search flow. What edge cases must you handle?
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42
Critique the Meta Ads Manager interface. What are its three biggest usability failures and how would you fix them?
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43
How would you incorporate generative AI into a Figma-like tool without making designers feel their job is at risk?
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44
Tell me about a time you received critical feedback on a design from engineering. How did you respond and what changed?
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45
Design an onboarding experience for Microsoft Azure's portal for non-technical business decision makers.
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46
Design the real-time delivery status tracking experience for a food delivery app from order placed to door drop-off. What information matters at each stage?
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47
Critique Figma's multiplayer collaboration features. What still prevents stakeholders who aren't designers from participating meaningfully in a review session?
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48
Tell me about a project where you redesigned a feature that users were already familiar with and attached to. How did you manage the risk of disrupting mental models?
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49
Design the in-app review prompt for a travel booking app. How do you ask users for a review without surfacing it at the wrong moment?
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50
How do you connect your design work to company OKRs? Walk me through a specific example where a design decision directly influenced a business metric.
Level 5 · Intermediate
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51
Walk me through a project where you had to make design decisions with incomplete data. How did you manage the ambiguity?
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52
How do you decide when a UI pattern is worth breaking from convention? Give an example where you broke convention successfully.
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53
Design a real-time collaborative shopping list feature for Amazon Household accounts. How do you handle conflict resolution?
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54
Critique the Facebook Groups mobile experience. What keeps it from being a truly great community product?
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55
Design an AI writing assistant feature for Microsoft Word that helps non-native English speakers. What are the ethical constraints?
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56
Design a unified notification centre for an app with 12 distinct notification types spanning social, transactional, and system alerts. How do you prevent notification fatigue?
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57
Walk me through a portfolio project where you had to design for offline-first or low-bandwidth scenarios. What did you prioritise keeping?
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58
How do you facilitate a decision when PM, engineering, and design all want different outcomes for the same feature and the deadline is tomorrow?
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59
Design the subscription cancellation flow for a $15/month streaming service. How do you reduce churn without crossing into dark pattern territory?
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60
Critique the GitHub pull request review experience for a developer joining their first open-source project. What fails them in the first hour?
Level 6 · Intermediate
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61
How would you redesign the Airbnb host onboarding experience to increase listing completion rates by 20%?
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62
How do you approach designing for both power users and casual users in the same product surface? Walk through a real trade-off.
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63
Critique the Apple App Store's discovery experience. Why do most users not explore beyond the top charts?
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64
Design the end-to-end experience for a Google Workspace user who accidentally deletes a shared company document.
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65
How has the rise of LLM-based interfaces changed your thinking about information architecture?
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66
Design an asynchronous design critique process for a distributed team across 4 time zones. How do you maintain quality feedback without synchronous meetings?
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67
Walk me through a project where you owned the full design lifecycle from discovery through post-launch iteration. What changed between your first design and what shipped?
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68
Critique Google Photos' face grouping and Memories features from a privacy design perspective. What design decisions introduce unintended emotional harm?
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69
Design the complete pricing and billing transparency experience for a SaaS product with both seat-based and usage-based billing on the same invoice.
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70
How do you build a shared design language between two product teams that have been designing independently for three years and are now merging?
Level 7 · Advanced
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71
Walk me through a project where data directly contradicted designer intuition and changed your design direction.
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72
Design a notification system for Meta's family of apps that reduces fatigue while maintaining engagement.
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73
Critique the Amazon Alexa app's visual interface. How would you unify the voice-first and touch-first experiences?
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74
Google is redesigning Search to integrate Gemini inline. Design the interaction model for when AI answers compete with organic results.
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75
Design a cross-platform design system for a product with native iOS, Android, and web surfaces — where do you enforce consistency and where do you defer to platform conventions?
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76
Walk me through the most impactful design you have shipped. How did you isolate design as the variable that drove the outcome?
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77
How do you decide when a UI pattern is worth adding to the design system versus keeping as a one-off solution for a single feature?
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78
Design the full developer onboarding experience for a payments API — from first API call to a working sandbox integration — targeting developers with no prior experience.
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79
Critique Figma's component properties and variants system. What conceptual gaps do designers who come from code consistently hit first?
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80
Redesign the Airbnb listing page for a returning guest booking the same property for the second time. What information is now irrelevant and what needs to surface?
Level 8 · Advanced
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81
Design a framework for evaluating whether a product should use AI-generated content or human-curated content in its UI.
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82
Tell me about the most complex design system you have worked on. How did you handle inconsistency across platforms?
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83
How would you redesign Microsoft Outlook to serve both enterprise power users and first-time email users without bifurcating the product?
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84
Design the trust and safety UX for an Airbnb feature that allows hosts to charge guests for verified damages.
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85
How would you redesign the Amazon Prime Video browse experience to reduce decision fatigue for casual viewers?
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86
Walk me through a time you owned the design vision for a 0→1 product. How did you validate the concept before the first engineer wrote a line of code?
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87
Design the complete payment failure and recovery experience for a B2B SaaS product where billing failure means the entire customer team immediately loses product access.
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88
How do you evaluate whether a design system is genuinely improving team velocity or has become a bureaucratic overhead that slows down feature delivery?
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89
Design the content moderation experience for a platform moderator who reviews 200 items per hour. How do you reduce error rate and prevent decision fatigue?
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90
Critique the Apple App Store's developer review guidelines from a product designer's perspective. Where do they protect quality and where do they introduce competitive harm?
Level 9 · Expert
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91
Design the AI disclosure and transparency UX framework for a Microsoft product that uses GPT to make decisions affecting users.
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92
How would you approach designing an entirely new product category where no established UX patterns exist yet?
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93
Amazon is building an ambient home AI system with zero screens. Design the complete interaction model for a core daily task.
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94
Design the product strategy and initial UX framework for a new wearable health device entering a market dominated by Apple Watch. What is your differentiation hypothesis?
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95
Walk me through the strategic trade-offs you made when designing a platform that serves B2B buyers and the B2C end-consumers they buy for — on the same surface.
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96
How do you ensure design remains strategically influential as a company scales from 30 to 300 engineers and the rate of feature shipping triples?
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97
Design the editorial and publishing workflow for a news platform where AI generates first drafts and human editors fact-check, edit, and publish under a byline.
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98
Critique Notion's information architecture. Why does it attract power users while simultaneously confusing 60% of new users into abandoning it?
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99
How do you build alignment on design quality standards across 10 autonomous product squads that each have their own designer and design direction?
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100
Design the complete activation and 'aha moment' experience for a developer tool where 80% of sign-ups never complete the first core task and churn within 7 days.
Level 10 · Expert
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101
Design a framework for how Meta should approach algorithmically personalised UI layouts that change based on individual usage patterns.
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102
Design the end-to-end design process for a company building the first AI-native word processor. No legacy metaphors allowed — how do you decide what to preserve?
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103
Walk me through the most complex cross-platform product you have designed. How did you maintain coherence without suppressing platform-native interaction conventions?
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104
How do you scale design excellence across a 200-person organisation where product teams have completely independent roadmaps, design budgets, and tech stacks?
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105
Design the design operations model for a 150-person design team across 8 time zones — covering critique rituals, tooling standards, and design system governance.
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106
Critique the full product design of Google Workspace — Docs, Sheets, Slides, Drive, and Meet — as if you just inherited it as the new VP of Design. What is your 90-day plan?
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107
How do you evaluate when a product has accumulated so much design and UX debt that incremental improvement is no longer viable and a full redesign is necessary?
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108
Design the interaction paradigm for a next-generation spreadsheet that replaces cell formulas with natural language instructions. What established conventions must you preserve?
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109
Walk me through the design system you are most proud of. How did you measure its adoption across teams and quantify its business impact?
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110
How do you maintain design team quality and morale during a 9-month company cost-cutting cycle where headcount, tooling budgets, and conference travel are all frozen?
Practice these out loud, with feedback
ZeroPrep scores every answer
Knowing an answer and saying it well under pressure are different skills. ZeroPrep gives you product designer questions pitched at your level, lets you type or speak your answer, then scores it out of 10, tells you what was missing and shows what a strong answer sounds like. Free, no account needed.
Frequently asked questions
What are the most common product designer interview questions?
“Walk me through a product you designed end to end”, “How do you balance user needs with business goals?”, “Tell me about a time a design you shipped failed” and “What metrics do you use to measure the success of a design?” are all reported by candidates and listed on this page.
What is a product sense question in a design interview?
A prompt to improve or invent a product live, such as “Design a feature that increases engagement on Instagram”. Treat it like a short whiteboard challenge: pick a user and a goal, name the problem, choose a metric, then propose and defend one idea.
How do I prepare for a product designer interview at a big tech company?
Practice each format out loud: a portfolio presentation with clear outcomes, behavioral stories about conflict and failure, and a timed design exercise. Read how the company talks about its own products so your answers fit how it thinks about design.