Grids, Strings & Intervals
Not every Rubrik round is about threads. The algorithms round and the new-grad HackerRank test also ask problems on grids, strings and intervals. Some are LeetCode problems with tighter limits, and others come wrapped in a server-farm story.
One comes up most, in both the test and the onsite, and the rest range from grid counting to string structures and interval sweeps.
On these problems, the limits decide the approach. Bounds near 10^5 rule out checking every cell or every point one at a time. So read the bounds first, then pick the counting trick that fits them. The problems below walk through each one in code you can run.
RubrikPremium lesson · Coding round
The 6 Rubrik problems are below.
- A Premium questionCoding · Medium · Frequently asked
- A Premium questionCoding · Hard
- A Premium questionCoding · Medium
+ 3 more in this lesson
Each with hints, the follow-up and a tested solution.
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From 202 Rubrik reports, forum threads behind logins and write-ups in Chinese.
Rubrik interview guideKnow what Rubrik asks before you walk in.
32 coding · 3 system design · 15 behavioral questions
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