Enterprise Architect Interview Questions UK: 8 Real Questions and What Interviewers Want

Most Enterprise Architect interviews in the UK follow a pattern, and knowing it beats guessing. Below are eight questions from our bank of 12, each with a note on what the interviewer is really after.

Eight Enterprise Architect interview questions, and what the interviewer is thinking

1. How would you use TOGAF or another framework to develop an enterprise architecture, and where do you adapt it rather than follow it by the book?

Why they ask: They want to know you can apply frameworks pragmatically rather than dogmatically.

2. How do you build and use a business capability map, and how does it drive investment decisions?

Why they ask: Capability-based planning is a core enterprise architecture technique linking strategy to technology spend.

3. How would you rationalise an application portfolio of several hundred systems after a merger?

Why they ask: Post-merger rationalisation is a classic, high-value enterprise architecture challenge.

4. How do you set up architecture governance that guides teams without becoming a bottleneck?

Why they ask: They are checking that you balance control with delivery speed.

5. How do you manage technical debt and legacy modernisation at enterprise level, and how do you make the business case?

Why they ask: They want to see you can justify long-term investment to non-technical leaders.

6. The CEO wants to adopt generative AI quickly across the business, but you have concerns about data, security and governance. How do you respond?

Why they ask: They want to see you can enable innovation while managing risk.

7. Tell me about a time you developed an architecture roadmap or target state that the business then adopted.

Why they ask: They want evidence you can turn strategy into an agreed, executable direction.

8. What does an enterprise architect add to an organisation, and how do you demonstrate your value to executives?

Why they ask: They want to understand how you see the role and communicate its value.

A sample answer to question 1

How would you use TOGAF or another framework to develop an enterprise architecture, and where do you adapt it rather than follow it by the book?

I use TOGAF as a toolkit, not a rulebook. The Architecture Development Method gives me a repeatable cycle, from the architecture vision through business, data, application and technology architectures, then opportunities, migration planning, governance and change management. In practice I tailor it heavily: I start with the business capabilities and the strategic outcomes the executive team cares about, produce only the artefacts that inform a decision, and run short iterations rather than long phases. I often combine it with ArchiMate for modelling, capability maps for communication, and Zachman or SABSA where security architecture needs a different lens. Where TOGAF can become bureaucratic, for example demanding every catalogue and matrix, I agree a minimum viable set with stakeholders. The test is whether each deliverable changes a decision, reduces risk or saves money. If not, I drop it, and I record the tailoring in an architecture principles and governance document.

Common mistake to avoid: Reciting TOGAF phases without practical examples; Producing artefacts nobody uses

Want the rest?

Full model answers, key points and common mistakes for all 12 questions are on the Enterprise Architect interview questions page. The first five are free, no sign-up needed.