Build a Data Structure

A lot of Palo Alto Networks coding rounds give you a class to build. You get a few operations and a cost target for each one. One of them is reported more than any other coding question at the company, at levels from new grad to principal.

The others came up in Tel Aviv loops, by name and inside event-stream stories, and two of them have been asked back to back as question and follow-up. One came from a principal round on concurrency, and it's the only one here that needs a lock. Expect more questions once the code runs. Interviewers here often dig under the code and ask why a call is O(1), or what breaks when two threads call it at the same time. Pick internals you can explain and defend.

Palo Alto NetworksPremium lesson · Coding round

The 5 Palo Alto Networks problems are below.

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

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

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