Platform Engineer signal: hash map + dedupe in a multi-tenant quota context. This is a ProdMatch-owned platform engineer drill, framed as a April 2026 Unacademy Cloud Platform simulation, not a copied platform question.
Company context
Unacademy · Cloud Platform
Freshness
April 2026
Product surface
multi-tenant quota
ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.
For multi-tenant quota, collapse duplicate tenants by external ID. Keep the newest event per ID and return IDs in first-seen order.
Input
Output
Constraints
Concepts
[(a,1),(b,1),(a,3)] -> [(a,3),(b,1)]
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