DevOps / SRE Engineer signal: hash map + dedupe in a rolling deploy planner context. This is a ProdMatch-owned devops sre drill, framed as a May 2026 Meta Release Platform simulation, not a copied platform question.
Company context
Meta · Release Platform
Freshness
May 2026
Product surface
rolling deploy planner
ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.
For rolling deploy planner, collapse duplicate pods 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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