Find Security Level
Reported by candidates from Amazon's online assessment. Pattern, common pitfall, and the honest play if you blank under the timer.
Amazon's "Find Security Level" question hit the assessment circuit in June 2025, and it's a deceptive one. You'll read the title and think it's about graphs or pathfinding, but it's really testing whether you can extract the right data structure and apply a simple traversal correctly. Most candidates over-engineer it. StealthCoder will catch you if you blank on the actual traversal logic during the live OA.
Pattern and pitfall
This problem hinges on understanding what "security level" means in Amazon's context, then computing it efficiently across a structure (likely a tree, graph, or nested array). The trick isn't the algorithm, it's the modeling. Candidates often misread the traversal order or confuse depth/breadth logic. If it's tree-based, you're doing either BFS for level-order or DFS for depth. If it's graph-based, same principle but watch for cycles and visited sets. The common pitfall is off-by-one errors on levels or forgetting to track state. StealthCoder becomes your safety net if you freeze on the exact traversal pattern during the real assessment.
The honest play: practice the pattern, and have StealthCoder ready for the one you didn't see coming.
You can drill Find Security Level cold, or you can hedge it. StealthCoder runs invisibly during screen share and surfaces a working solution in under 2 seconds. The proctor sees the IDE. They don't see what's behind it. Built for the candidate who saw this exact problem leak two days before his OA and wondered if anyone had a play.
Get StealthCoderRelated leaked OAs
This OA pattern shows up on LeetCode as binary tree level order traversal. If you have time before the OA, drill that.
You've seen the question.
Make sure you actually pass Amazon's OA.
Amazon reuses patterns across OAs. Built for the candidate who saw this exact problem leak two days before his OA and wondered if anyone had a play. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Find Security Level FAQ
What does 'security level' actually mean here?+
Without the exact problem statement, it's likely a depth, distance, or threat rating in a tree or graph. Assume it's computed relative to a root or entry point. Amazon uses this language for access control and network problems, so test on a simple example first to confirm your interpretation.
Is this a BFS or DFS problem?+
Most 'level' problems are BFS because you're computing distance or rank from a source. DFS is rarer but possible if you're computing depth in a tree. Write both patterns in your head before coding. BFS uses a queue, DFS uses recursion or a stack. The problem title hints at BFS.
What's the trick Amazon is testing?+
They want to see if you can correctly traverse and track state without overthinking. Don't assume the problem is complex. Implement the straightforward traversal, handle edge cases (empty input, single node), and validate on the examples. Most fails are logic bugs, not algorithm choice.
How do I prepare in 48 hours if I haven't seen this exact problem?+
Drill LeetCode 102 (binary-tree-level-order-traversal) and 733 (flood-fill). Both are BFS templates. Understand how to build a visited set and process a queue or queue-like structure. Practice these two and you'll recognize the pattern immediately.
Should I worry about performance or correctness first?+
Correctness. Amazon's online assessments prioritize passing test cases over runtime optimization. Write clear, correct BFS or DFS first. Then optimize if time permits. An O(n) solution that passes all cases beats an O(1) idea that doesn't compile.