Trees & Graphs

A Tesla runs on graphs long before any interviewer draws one. Autopilot keeps an occupancy grid, a lattice of cells marking which patches of the world are free and which are taken. Routing to a Supercharger is a shortest path over a road graph. A vehicle even boots its software as a dependency graph, each service waiting on the ones it needs. So when a Track A screen reaches for a tree or graph problem, it lands on ground the product is built from, and the frames below lean into that where the framing stays honest.

Nearly everything in this family runs off one skeleton: a depth-first or breadth-first walk that remembers where it has been. A tree lets you drop the memory, since it has no cycles and every node has a single parent. A graph puts it back, because an edge can close a loop and two paths can arrive at the same node. Make that one distinction reflexive and most of the cluster becomes the same loop with different bookkeeping.

The Tesla angle

These problems live in Track A, the standard-LeetCode track, where an optimal, readable solution is the bar and a merely-correct one is marked down. Roles on the software side, from full-stack through backend to infrastructure, get medium-dominant algorithm problems. Engineers who sat them rate the bar a notch below the Google line. The grade is whether the code is the tightest version and reads cleanly. Graphs and grids are a real but secondary cluster here, around one in ten problems, while arrays and two-pointer work dominate at better than a third. There is no single Tesla graph signature, which is itself the honest headline: the company reuses generic problems, and what sets its loops apart is the track you applied to, not a trick question. Of the graph asks, candidate reports name a Premium question as the grid problem they met most. Firmware and Autopilot interview almost nothing like this, and their own lessons cover them.

TeslaPremium lesson · Coding round

The 3 Tesla problems are below.

1. 1A Premium questionCoding · Medium · Frequently asked
2. 2A Premium questionCoding · Medium
3. 3A Premium questionCoding · Medium

Each with hints, the follow-up and a tested solution.

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