OA: Maximise (A xor X) * (B xor X) for X < 2^N, Modulo 1e9+7

OAMicrosoftLast reported July 2026Low Frequency

Reported: 2× across candidate reports
First seen: July 2026
Last reported: July 2026
Reported outcome: unknown

Problem Overview

Microsoft online assessment question, reconstructed from 2 candidate reports (July 2026). The write-up includes a Python solution that passes 7 test cases.

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Every question is reconstructed from multiple independent candidate reports. Follow-ups candidates reported, not invented ones.

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