24How would you launch recommendations when both users and items have little interaction history?▼hardNewGoogleMetaSpotify◆ premiumSeparate new-user and new-item problems, design a useful first session, and test whether early relevance survives beyond onboarding.Practise this question →Read answer →
25Two search rankers look equally good offline. Would you use interleaving or an A/B test to choose one?▼expertNewGoogleMicrosoft◆ premiumCompare ranking preferences efficiently without mistaking a click preference for a retention or revenue result.Practise this question →Read answer →