Microsoft Frontend Engineer Interview Questions

I would use skeletons, optimistic updates when safe, and progressive disclosure so the user can start interacting early. I would also prefetch likely next data and avoid blocking the whole interface on one slow dependency.

A good component API is consistent, minimal, and hard to misuse. I would favor clear props, sensible defaults, composition over overloading, and names that make the intended usage obvious.

I would reproduce it with production-like data, inspect differences in build configuration, and review logs or telemetry for the affected path. I would also check for timing issues, race conditions, and browser-specific behavior.

I would load data in small pages, detect when the user approaches the end of the list, and request the next page without blocking the current view. I would also manage loading indicators, deduplication, and scroll position carefully.

CSS animations are usually simpler and more efficient for common transitions, while JavaScript gives more control for complex interaction or timeline logic. I would choose the simplest option that keeps motion smooth and maintainable.