AI & Technical question

How will you design a mobile version of MS Word and ensure real time collaboration within this app?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Whether you can design a mobile product experience alongside the real technical tradeoffs of real-time collaboration.

Clarify scope: a mobile MS Word app supporting simultaneous multi-user editing, similar to Google Docs on mobile.
Identify mobile-specific constraints: smaller screens for cursors and presence indicators, and unreliable connectivity for sync.
Design the core experience: live cursors, presence avatars, and inline comments adapted for touch and small screens.
Address the technical approach at a product level: operational transformation or conflict-free replicated data types to merge edits without conflicts.
Handle offline editing: changes queue locally and merge when connectivity returns, with conflict resolution surfaced simply to the user.
Define success metrics: percent of documents edited by 2 or more users concurrently, and sync conflict rate as a guardrail.

Names the real technical mechanism, like CRDTs or operational transformation, showing awareness of what makes real-time collaboration work.
Addresses offline editing explicitly, since mobile connectivity is far less reliable than desktop.
Redesigns presence and cursors for small screens rather than just shrinking the desktop UI.
Gives a guardrail metric, sync conflict rate, to ensure the merge logic is actually working well in practice.

Describing the feature purely visually without addressing how conflicting edits actually get merged.
Ignoring mobile-specific connectivity issues and assuming always-on sync like desktop.

How would you handle two users editing the exact same sentence at the same time?
What would you do if sync conflicts spiked after a release?