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Instrument a first-full-song activation event

Source: interviewbeginner

WHAT IT TESTS: precise event definition and reliable instrumentation. OUTLINE: define 'full song' server-side, emit a typed event with user, song, and context, dedupe the first-time flag.

WHAT IT TESTS: turning a fuzzy activation definition into a reliable, deduplicated event. ANSWER OUTLINE: define completion precisely (e.g., playback position reaches near the track end, not just play start); emit an event with user_id, song_id, timestamp, source, and a completion marker; let the backend validate against actual streamed duration to resist client spoofing; mark first-ever completion using a stored flag so activation fires once per user.

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Instrument a first-full-song activation event · Tezvyn