InterviewDigestTechnical2026-08-12
Find the missing number in an array and optimize the solution.
AI-Expanded — inferred from the question title, not from the original candidate report
Given an array containing $n$ distinct numbers taken from the range $0$ to $n$, identify the single number missing from the sequence. Provide an implementation that achieves $O(n)$ time complexity and $O(1)$ auxiliary space complexity, explaining the trade-offs between your chosen approach and alternative methods like sorting or hash sets.
Context & Summary
1-hour interview with a mid-senior level engineer focused on understanding the candidate's work experience and problem-solving approach. Questions covered programming, embedded systems concepts, and project-specific details.
💻 Coding practice works best on desktop.
Code editors are too cramped on mobile screens.
Loading editor...
AI can automatically infer and generate example test cases for this question based on standard algorithmic constraints.