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Attribute a mobile install to a desktop ad

Source: interviewintermediate

WHAT IT TESTS: cross-device attribution methods and their trade-offs. OUTLINE: deterministic matching via a shared login is accurate but needs auth on both ends; probabilistic fingerprinting scales without login but is noisy and privacy-fraught.

WHAT IT TESTS: whether you understand deterministic versus probabilistic cross-device attribution and the privacy landscape. ANSWER OUTLINE: deterministic matching links devices through a shared identifier, typically the same logged-in account on desktop and mobile, which is highly accurate but requires authentication on both touchpoints. Probabilistic matching infers a link from signals like IP, timing, and device characteristics, scaling to logged-out users but producing only statistical likelihood with errors.

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Attribute a mobile install to a desktop ad · Tezvyn