StealthCoder

BlackRock OA questions,
7 reported by real candidates.

Every BlackRock online assessment question candidates have reported, most recent September 2026. The pattern that shows up most: tree.

Get StealthCoderRuns invisibly during the live BlackRock OA. Under 2s to a working solution.

September 2026 (2)

tree
Lowest Common Ancestor in a Parent Tree
Valid Parentheses

March 2026 (1)

Process Scheduling

September 2024 (2)

Calculate Distance
Efficient Matching

August 2024 (1)

Is Happy Number

July 2024 (1)

Count Levels
⏵ Beyond the OA

BlackRock also has 17 LeetCode problems reported from its interviews, with the topics it leans on most.

⏵ The honest play

You've seen BlackRock's questions. Yours might be the one not on the list.

StealthCoder runs invisibly during the live screen share. It reads the problem on screen and surfaces a working solution in under 2 seconds. Works on HackerRank, CodeSignal, CoderPad, and Karat.

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Questions reported by candidates from real Online Assessments. Sourced from a publicly-available candidate-aggregated repository. Not affiliated with BlackRock.

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