This page needs a newer browser to run its tools. You can still read everything here.

Product sense and product design interview questions

Interview questions on product sense and product design: warm-ups, then what each harder question tests and how a good answer starts.

26 questions: 5 warm-ups and 21 with model answers · Levels: Fresher to staff

Warm-up questions

Short questions with short answers, each answered in full.

Fresher to mid

What is the difference between a user segment and a persona?

Answered in the lesson Users, needs and pain points
Fresher to mid

What makes a product a minimum viable product, and what is it not?

Answered in the lesson Designing a product for a user group
Fresher to mid

Why do the step rates of a funnel multiply, and what does that mean for the step you improve first?

Answered in the lesson Improving an existing product
Fresher to mid

What does the "favourite product" question test, and what makes a weak answer to it?

Answered in the lesson Critiquing a product you use
Fresher to mid

Give one product problem where you would not use AI, and say why.

Answered in the lesson Designing AI product features

Questions with model answers

What each question tests, the first step of a good answer and the follow-ups to expect.

Fresher to senior

A city library wants more people to use its app. Name three user segments, choose one and defend the choice in under two minutes.
What it tests

Segmenting by situation and need, choosing one segment with criteria tied to the library's goal, and keeping a structured answer inside a strict time limit.

First step

Spend the first 15 seconds on the goal: more people using the app could mean more borrowing, more visits or more people at events, and each points at a different segment. Say your assumption aloud, then name three segments by situation, not by age.
Follow-ups
- The librarian says most app users already visit every week.
- How would you check that your segment is big enough?
- What would you build first for the segment you chose?
From the lesson Users, needs and pain points
Model answer, Pro. Model answers open with any pass; prices are in the notice on this page.
Opening the model answers with your pass…
Model answers open with any MySmartCoPilot pass.
Pro pass · 1 week₹79$2.99
30 days₹179$5.99
1 year₹1,699$45
One payment; a pass never renews. The price shown is the total you pay: no fees or charges are added at checkout.
Passes can’t be bought right now, so the model answers can’t be opened at the moment. If you have a pass, enter your licence key.
Choose a pass I have a licence key
It also opens every other in-depth part in Learn and every Pro tool. Sales are final, except where the law gives you a right to withdraw, for example in the EU and the UK (refund policy).
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 4 minutes
Fresher to mid

Write the job to be done for a daily metro commuter who opens a transit app, and say which pain point you would solve first.
What it tests

Writing a job as progress in a situation rather than as a feature, ranking pain points by frequency and severity, and tying the first fix to the job.

First step

Pin down the situation before the job: the moment the commuter opens the app, usually just before leaving or on the platform. Then write the job in the "When …, I want to …, so I can …" form and list three pain points with how often each one happens.
Follow-ups
- Why not start with the most severe pain point?
- The transit authority will not share live train data. What changes?
- How would you know the fix worked?
From the lesson Users, needs and pain points
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Fresher to senior

Design a product for working parents of toddlers in a large city. Walk through your user choice, the problem you solve and how you would know it worked.
What it tests

Narrowing a broad group by situation, choosing the problem that matters most, deciding between distinct solutions and tying the metrics to the goal.

First step

Ask what success means for the company, then split "working parents" by situation before choosing: parents whose toddler goes to day care, parents who share care with grandparents, and parents who work shifts. Choose one group and say why its problem is the sharpest.
Follow-ups
- Why not design for all working parents?
- What is the first version, and what does it leave out?
- Your metric rises, but parents say they feel more stressed. What now?
From the lesson Designing a product for a user group
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 4 minutes
Mid to senior

Design a product that helps smallholder farmers decide when to irrigate. What do you build first, and which constraints change your design?
What it tests

Designing under real constraints, such as phones, signal, language, electricity and money, and choosing a first version that tests the riskiest assumption rather than the most features.

First step

Before any solution, ask about the farmers' constraints: which phones they use, when they have signal and electricity, which languages they read or speak, how they water their fields and who decides. Then name the assumption the whole product rests on.
Follow-ups
- Most of the farmers have basic phones without apps. What changes?
- How would you show that the advice saved water without hurting the crop?
- Who pays for it?
From the lesson Designing a product for a user group
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 4 minutes
Fresher to mid

Design a product for students living in college hostels. The interviewer wants the one feature you would launch first and its success metric.
What it tests

Narrowing fast to one launch feature and one metric under an interviewer's constraint, while keeping the user and the problem explicit.

First step

Spend half a minute choosing a situation inside hostel life, such as students in their first weeks away from home or students who share laundry machines. Name that group's sharpest problem, then the feature, then the metric.
Follow-ups
- Why that feature and not a marketplace for second-hand books?
- What target would you set for the metric?
- What could the feature harm?
From the lesson Designing a product for a user group
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Fresher to senior

A food-ordering app wants more repeat orders from people who ordered once. How would you improve the product, and what would you measure?
What it tests

Starting from the goal and the path after a first order, splitting one-time buyers by what happened to them, and choosing a measurable improvement with a guardrail.

First step

Turn the goal into a number, such as a second order within 30 days, then split one-time buyers by what happened in their first order: late, wrong or cold food, a price that surprised them at checkout, or a good order and no reason to come back. Each group needs a different fix.
Follow-ups
- Would you give a discount on the second order?
- How would you know the change worked, and not the season?
- What would you watch to make sure the change does no harm?
From the lesson Improving an existing product
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 4 minutes
Fresher to senior

A language-learning app loses most new users before day 7. Propose two improvements, choose one and describe the test you would run.
What it tests

Locating where in the first week users drop, proposing distinct improvements, choosing between them with numbers and designing a test with a guardrail.

First step

Draw the first week as a funnel before proposing anything: sign-up, the first lesson finished, a return on day 2 and a visit on day 7. Find the step with the largest drop and aim both improvements at it.
Follow-ups
- Your test lifts day-7 retention but not day-30 retention.
- How long would you run the test?
- The drop is the same in every country. What does that tell you?
From the lesson Improving an existing product
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to senior

Only 40 percent of people who start an online licence-renewal form finish it. How do you work out why, and what do you change first?
What it tests

Diagnosing a completion rate with the funnel by step and by segment, separating measurement problems from design problems, and fixing the biggest drop first.

First step

Check the measurement first: what counts as a start and a finish, and whether people who leave to find a document and come back are counted as two starts. Then break the 40 percent down by step and by device.
Follow-ups
- Half of those who leave do so at the document upload.
- Older applicants finish less often than others.
- How do you know your change worked?
From the lesson Improving an existing product
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Fresher to senior

A video-calling app wants more weekly users among people over 60. Which stage of the funnel do you work on first, and how would you know it worked?
What it tests

Treating a growth question as an improve question: laying out the growth stages for one group, finding the weakest stage with evidence, and choosing a metric and a guardrail.

First step

Lay out the stages for this group, reaching them, a first successful call, calling again the next week and inviting others, and compare the rate at each stage for people over 60 with the rate for everyone else.
Follow-ups
- Most older users are invited by a family member. Does that change the plan?
- Weekly users rise, but minutes on calls fall.
- How do you avoid designing for a stereotype of older people?
From the lesson Improving an existing product
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 4 minutes
Fresher to senior

Name a design choice in an app you use that looks like a flaw but probably exists on purpose. Explain the likely reason and whether you would change it.
What it tests

Seeing the constraint, business model or trade-off behind a design choice before judging it, and deciding about a change with its cost and a measure.

First step

Pick a choice that annoys you but that a sensible team could have made on purpose, and name its likely reason as one of four kinds: a constraint, the business model, a trade-off between groups of users or aversion to change. Only then decide whether to change it.
Follow-ups
- How would you check that your reason is the real one?
- Who would lose if the choice were reversed?
- What would you measure if you changed it?
From the lesson Critiquing a product you use
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to senior

Critique a free app that shows ads, from the user's side and from the business's side. Where do the two conflict, and what would you change?
What it tests

Seeing a product through both its users and its business model, naming the exact point where they conflict, and proposing a change measured on both sides.

First step

Choose one app and describe the two sides separately: what users come for and what the ads cost them, then how the ads pay for the app and what the business needs from its users. Then find the screen or moment where the two pull hardest in opposite directions.
Follow-ups
- Why not remove the ads?
- How would you measure both sides at once?
- Some users would pay to remove the ads. Should the app offer that?
From the lesson Critiquing a product you use
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Fresher to senior

In your favourite product, which change would you ship next quarter, what could it harm and how would you measure both?
What it tests

Choosing one change from a product's users and job, foreseeing what it could harm, and pairing a success metric with a guardrail.

First step

Restate the product's user and job in a sentence, pick the one failure that matters most for that user, and propose a single change aimed at it. Then ask who or what the change could hurt before naming any metric.
Follow-ups
- Why this change and not a bigger one?
- The success metric rises and the guardrail gets worse. Do you ship?
- How long would you measure before deciding?
From the lesson Critiquing a product you use
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to senior

Design appointment reminders for outpatients of a district hospital, where many patients share a basic phone. Which channel do you choose, and why?
What it tests

Choosing a channel from the users' constraints rather than by habit, and designing for shared basic phones, mixed reading and the cost of a missed appointment.

First step

Start from who receives the reminder and on what phone: the patient, or the family member whose phone it is. Then weigh a voice call, a text, a missed-call number and the hospital's own staff against device, reading and trust.
Follow-ups
- How do you know which language to call in?
- What if the patient's number belongs to a neighbour?
- Which metric shows the reminders work?
From the lesson Designing products for users in India
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to staff

Design a product that helps handloom weavers sell outside their town. What do you assume about their phones, languages and payments, and how do you check those assumptions?
What it tests

Making assumptions explicit for an unfamiliar user group, sizing them with official data and field checks, and designing a first version that tests the riskiest one.

First step

List the assumptions before the solution: who in the household holds the phone, whether it is a smartphone, which language the weavers read, and how they are paid today. Mark each one as known from data or to be checked in the field.
Follow-ups
- Which assumption would you check first, and how?
- Why not simply list the weavers on an existing marketplace?
- How would weavers be paid, and how fast?
From the lesson Designing products for users in India
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to senior

Many users of your bank's app share one phone with family members. What changes in sign-in, notifications and privacy, and how do you test those changes with real users?
What it tests

Designing for privacy and security on a shared device without making the app unusable, and testing with users in the setting where the problem happens.

First step

Picture the phone in a family: who opens it, who sees the lock screen, who might open the app. Decide what each of them should and should not be able to see or do before you change a single screen.
Follow-ups
- Should the app ask for a PIN every time?
- What should a notification show?
- How would you recruit families for the test?
From the lesson Designing products for users in India
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to staff

Your subscription product is behind its growth target. A teammate proposes making cancellation take five screens. How do you respond, and what do you propose instead?
What it tests

Judgement when a growth target tempts a dark pattern: naming the pattern and its risks, keeping the team's goal, and proposing honest ways to keep subscribers, with a metric that measures them.

First step

Take the target seriously before rejecting the idea: the teammate wants fewer cancellations. Then name what five screens would be, a subscription trap, say what it costs later, and look at why people cancel.
Follow-ups
- What if leadership insists on it?
- Is a retention offer on the cancel screen a dark pattern?
- Which metric would show that your alternative works?
From the lesson Accessibility, privacy and dark patterns
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Fresher to senior

A travel-booking checkout adds travel insurance by default. What is wrong with it, and how would you redesign it while protecting revenue?
What it tests

Recognising basket sneaking in a checkout, explaining its legal and trust costs, and designing an honest offer that still sells to the travellers who want it.

First step

Name it first: adding a paid product to the basket without the traveller's choice is basket sneaking, a specified dark pattern. Then ask which travellers value insurance, and at which moment of the booking they would choose it.
Follow-ups
- Won't revenue fall if the box is unticked?
- Is a pop-up that asks about insurance acceptable?
- How do you measure the honest version?
From the lesson Accessibility, privacy and dark patterns
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to senior

You are launching a new payment screen. Which accessibility checks do you require before launch, and how do you decide whether a gap blocks the launch?
What it tests

Treating accessibility as a launch requirement: the WCAG 2.2 checks that matter for payments, testing with people who use assistive technology, and a clear rule for what blocks a launch.

First step

List what a person must be able to do on the screen, such as enter the amount, choose the account, confirm and read an error, and map each task to the WCAG 2.2 level AA criteria that could stop it.
Follow-ups
- Who tests it, and how?
- What if fixing a gap delays the launch by a month?
- Which checks can be automated?
From the lesson Accessibility, privacy and dark patterns
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to staff

Design an AI assistant that drafts replies to customer messages for small shop owners. How do you handle wrong drafts, and how do you know it is working?
What it tests

Designing an AI feature end to end for small businesses: what it may say, the experience of wrong drafts, the owner's control over what is sent, and measures of quality and value.

First step

Start with the shop owner's day and the cost of a wrong reply: a draft that promises a refund or the wrong price can lose a customer. Then decide what the assistant may draft at all, and where the owner stays in control.
Follow-ups
- Should drafts ever be sent without the owner?
- How do you measure quality before launch?
- What does the feature cost per shop, and who pays?
From the lesson Designing AI product features
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to staff

Your AI moderation feature catches more harmful posts if you accept more false alarms. How do you choose the threshold, and who do you involve?
What it tests

Choosing a threshold as a product decision: the costs of missed harm and of false alarms, who bears each, and the people who must agree.

First step

Name both errors and who pays for each: a missed harmful post hurts the people who see it, and a false alarm silences someone who did nothing wrong. Then put a cost on each, with the people who carry those costs.
Follow-ups
- Who should own the threshold?
- Should the threshold be the same in every language?
- What do users whose posts are removed by mistake see?
From the lesson Designing AI product features
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes
Mid to senior

A bigger model writes better summaries but takes 4 seconds and costs five times more per request. How do you decide which one to launch?
What it tests

Weighing quality against waiting time and cost with evidence: what users notice, what the business pays, and how a test settles it.

First step

Turn "better" into a number users feel, such as summaries used without edits, and price the difference: five times the cost and 4 seconds of waiting, against how much better, for whom.
Follow-ups
- Could you use both models?
- How long will users wait for a summary?
- What would make you switch later?
From the lesson Designing AI product features
Model answer, Pro.
In the answer:
- Model answer
- Follow-up answers
- Common mistakes
- Rubric
- Variants
- about 3 minutes

The lessons of this module

Users, needs and pain points Free lesson, Pro answers: 20 minutes
Designing a product for a user group Free core, Pro depth: 5 of 15 minutes free
Improving an existing product Free core, Pro depth: 7 of 20 minutes free
Critiquing a product you use Free core, Pro depth: 6 of 15 minutes free
Designing products for users in India Free core, Pro depth: 6 of 15 minutes free
Accessibility, privacy and dark patterns Free core, Pro depth: 6 of 15 minutes free
Designing AI product features Free core, Pro depth: 8 of 20 minutes free

All Product Manager Interviews interview questions · The Product Manager Interviews track

Warm-up questions

What is the difference between a user segment and a persona?

What makes a product a minimum viable product, and what is it not?

Why do the step rates of a funnel multiply, and what does that mean for the step you improve first?

What does the "favourite product" question test, and what makes a weak answer to it?

Give one product problem where you would not use AI, and say why.

Questions with model answers

A city library wants more people to use its app. Name three user segments, choose one and defend the choice in under two minutes.

Write the job to be done for a daily metro commuter who opens a transit app, and say which pain point you would solve first.

Design a product for working parents of toddlers in a large city. Walk through your user choice, the problem you solve and how you would know it worked.

Design a product that helps smallholder farmers decide when to irrigate. What do you build first, and which constraints change your design?

Design a product for students living in college hostels. The interviewer wants the one feature you would launch first and its success metric.

A food-ordering app wants more repeat orders from people who ordered once. How would you improve the product, and what would you measure?

A language-learning app loses most new users before day 7. Propose two improvements, choose one and describe the test you would run.

Only 40 percent of people who start an online licence-renewal form finish it. How do you work out why, and what do you change first?

A video-calling app wants more weekly users among people over 60. Which stage of the funnel do you work on first, and how would you know it worked?

Name a design choice in an app you use that looks like a flaw but probably exists on purpose. Explain the likely reason and whether you would change it.

Critique a free app that shows ads, from the user's side and from the business's side. Where do the two conflict, and what would you change?

In your favourite product, which change would you ship next quarter, what could it harm and how would you measure both?

Design appointment reminders for outpatients of a district hospital, where many patients share a basic phone. Which channel do you choose, and why?

Design a product that helps handloom weavers sell outside their town. What do you assume about their phones, languages and payments, and how do you check those assumptions?

Many users of your bank's app share one phone with family members. What changes in sign-in, notifications and privacy, and how do you test those changes with real users?

Your subscription product is behind its growth target. A teammate proposes making cancellation take five screens. How do you respond, and what do you propose instead?

A travel-booking checkout adds travel insurance by default. What is wrong with it, and how would you redesign it while protecting revenue?

You are launching a new payment screen. Which accessibility checks do you require before launch, and how do you decide whether a gap blocks the launch?

Design an AI assistant that drafts replies to customer messages for small shop owners. How do you handle wrong drafts, and how do you know it is working?

Your AI moderation feature catches more harmful posts if you accept more false alarms. How do you choose the threshold, and who do you involve?

A bigger model writes better summaries but takes 4 seconds and costs five times more per request. How do you decide which one to launch?