Platform Engineer signal: topological sort + cycle detection in a package dependency index context. This is a ProdMatch-owned platform engineer drill, framed as a May 2026 Zerodha DevEx simulation, not a copied platform question.
Company context
Zerodha · DevEx
Freshness
May 2026
Product surface
package dependency index
ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.
You own package dependency index for a Platform Engineer loop. Given packages and directed dependencies between them, return a valid execution order. If a cycle exists, return an empty list and identify that the rollout is blocked.
Input
Output
Constraints
Concepts
packages: 4, deps: [[0,1],[0,2],[2,3]] -> [0,1,2,3] or [0,2,1,3]
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