Intervalshard70 minMobile Engineer

Search Capacity Interval Planner

Mobile Engineer signal: line sweep + interval merge in a on-device search context. This is a ProdMatch-owned mobile engineer drill, framed as a March 2026 Intuit Mobile Search simulation, not a copied platform question.

Company context

Intuit · Mobile Search

Freshness

March 2026

Product surface

on-device search

ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.

Question

Plan capacity for on-device search. Given reservation intervals with requested units, return the minimum capacity needed and all time ranges where capacity crosses a critical threshold.

Input

Intervals [start, end, units] and threshold.

Output

Peak capacity and merged high-pressure intervals.

Constraints

1 <= intervals.length <= 200000
Intervals are half-open: [start, end).
Timestamps fit in signed 32-bit integers.

Concepts

offline sync
local cache
gesture streams
line sweep
interval merge
capacity planning

[[1,4,3],[2,5,4]], threshold=6 -> peak=7, hot=[[2,4]]

Approach

Try framing your own approach first. The 30 seconds you think before peeking is where learning happens.

Clean Solution

Reveal the approach first.

How well did you understand?

Your rating tunes when this problem shows up again.

Common Mistakes

Be explicit about whether touching endpoints overlap.
Process end events before start events for half-open intervals.

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