Software Engineer signal: bitmask DP + state compression in a checkout reliability context. This is a ProdMatch-owned software engineer drill, framed as a May 2026 ServiceNow Payments Core simulation, not a copied platform question.
Company context
ServiceNow · Payments Core
Freshness
May 2026
Product surface
checkout reliability
ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.
For checkout reliability, each events requires a subset of capabilities. Choose the smallest team of services covering all required capabilities; tie-break by lowest total risk.
Input
Output
Constraints
Concepts
required={A,B,C}, services=[AB risk 4, C risk 1] -> count=2, risk=5
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