UI/UX Designer Interview Questions

1.1User-centred design - the philosophy, the process, and why it produces better products

1.2Design thinking - empathise, define, ideate, prototype, test, and applying it in practice

1.3UX vs UI - the distinction, how they work together, and why both matter

1.4The designer role in a product team - working with PMs and engineers and when to involve design

2.1Research methods - interviews, surveys, usability testing, contextual inquiry, and when to use each

2.2Recruiting research participants - finding the right users and running ethical research

2.3Analysing qualitative data - affinity mapping, thematic analysis, and extracting actionable insights

2.4Presenting research findings - how to communicate insights to stakeholders who were not in the room

3.1Information architecture - organising content so users can find what they need

3.2Navigation patterns - menus, tabs, breadcrumbs, and designing intuitive wayfinding

3.3Card sorting and tree testing - techniques for validating IA with real users

3.4Content hierarchy - visual weight, scanning patterns, and guiding users through a screen

4.1Interaction design principles - affordance, feedback, constraints, and mental models

4.2Wireframing - low-fidelity sketches and digital wireframes for exploring layout and flow

4.3Prototyping - clickable prototypes, fidelity levels, and choosing the right prototype for the test

4.4Micro-interactions - animations, transitions, and the small details that make a product feel polished

5.1Visual design principles - typography, colour, spacing, and creating visual hierarchy

5.2Design systems - components, tokens, documentation, and maintaining consistency at scale

5.3Accessibility - WCAG guidelines, colour contrast, keyboard navigation, and inclusive design

5.4Responsive design - designing for multiple screen sizes, breakpoints, and device types

6.1Planning a usability test - objectives, tasks, recruiting, and choosing the right method

6.2Running moderated usability tests - facilitation, note-taking, and avoiding leading participants

6.3Unmoderated testing - remote testing tools, task design, and analysing session recordings

6.4Interpreting results - severity ratings, frequency vs impact, and translating findings into design decisions

7.1Design tools - working in Figma or equivalent and organising files for collaboration

7.2Component libraries - building reusable components that scale across a product

7.3Design handoff - annotating designs, writing specs, and working with engineers to implement correctly

7.4Design QA - reviewing implemented screens against designs and managing the gap

8.1Quantitative UX metrics - task completion rate, error rate, time on task, and SUS scores

8.2Combining qual and quant - when to use analytics to find the what and research to find the why

8.3A/B testing from a design perspective - hypothesis formation, variant design, and interpreting results

8.4UX KPIs - NPS, CSAT, retention, and how designers connect their work to business outcomes

9.1Design critique - giving and receiving feedback in a way that improves the work

9.2Presenting designs - how to walk through your work, explain your decisions, and handle pushback

9.3Working with engineers - understanding technical constraints, negotiating trade-offs, and maintaining quality

9.4Building a design culture - advocating for users, raising design standards, and making design visible in the organisation

10.1Portfolio presentation - how to walk through case studies, explain your process, and demonstrate impact

10.2Design exercises - whiteboard challenges, take-home tasks, and presenting a design decision under pressure

10.3Behavioural questions - collaboration, constraints, user advocacy, and navigating competing priorities

10.4Salary negotiation for design roles, evaluating a design team and process maturity, and questions that reveal the real design culture