45-Minute Rapid Product Design Exercise

Q: 45-Minute Rapid Product Design Exercise

Practice a 45-minute end-to-end product design exercise using a same-day healthcare appointment finder example. The solution covers clarifying questions, assumptions, target users, MVP workflows, low-fidelity wireframes, metrics, trade-offs, architecture, data, integrations, risks, and validation.

Q: How do I approach Product / Decision Making interview questions?

Product / Decision Making questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master product / decision making interviews.

Q: What difficulty level is this interview question?

This is a hard difficulty Product / Decision Making question, commonly asked during Onsite rounds at Kayak.

Q: What role is this question designed for?

This question is commonly asked for Product Manager candidates at Kayak during technical interviews.

Question

Product Design Exercise: End-to-End System in 45 Minutes

Design an end-to-end system. It does not need to be travel-related. You have 45 minutes.

Your deliverable should include:

Problem statement and target users.
- Ask clarifying questions.
- State assumptions.
Core user journeys and MVP feature set.
- Identify primary workflows.
- Define the smallest feature set to validate the riskiest assumptions.
Screen flow and low-fidelity wireframe.
- Provide a simple screen map and rough text or ASCII sketches.
Success metrics and key trade-offs.
- Define a North Star Metric and supporting metrics.
- Call out important trade-offs.
High-level technical considerations for initial launch.
- Architecture, data, integrations, constraints, and risks.

Constraints & Assumptions

Timebox each section and prioritize the riskiest assumptions.
State assumptions if requirements are ambiguous.
The answer should be complete enough to evaluate product thinking, UX flow, metrics, and technical awareness.
A low-fidelity wireframe can be text-based.

Clarifying Questions to Ask Guidance

Who are the primary users?
What problem are we solving now versus later?
What platforms and geographies are in scope?
What business model and constraints apply?
What existing systems or integrations are available?
What North Star Metric and guardrails matter most?

What a Strong Answer Covers Guidance

Clear timeboxing.
Focused problem and target user.
MVP designed around riskiest assumptions.
Core user journeys.
Simple screen flow or wireframe.
North Star, input metrics, and guardrails.
High-level architecture and launch risks.

Follow-up Questions Guidance

What did you deliberately exclude from MVP?
What is the riskiest assumption?
How would you test demand before building?
How would the system scale after launch?
What would make you pivot?

45-Minute Rapid Product Design Exercise

Quick Overview

45-Minute Rapid Product Design Exercise

Product Design Exercise: End-to-End System in 45 Minutes

Constraints & Assumptions

Clarifying Questions to Ask Guidance

What a Strong Answer Covers Guidance

Follow-up Questions Guidance

Write your answer