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Bit Manipulationhard70 minPlatform Engineer

CI Policy State Compression

Platform Engineer signal: bitmask DP + state compression in a CI flake detector context. This is a ProdMatch-owned platform engineer drill, framed as a March 2026 Meesho Engineering Productivity simulation, not a copied platform question.

Company context

Meesho · Engineering Productivity

Freshness

March 2026

Product surface

CI flake detector

ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.

Question

For CI flake detector, each jobs requires a subset of capabilities. Choose the smallest team of services covering all required capabilities; tie-break by lowest total risk.

Input

  • m capabilities and services with capability masks plus risk.

Output

  • Minimum service count and risk, or impossible.

Constraints

  • 1 <= m <= 22
  • 1 <= services.length <= 2000
  • Capability sets may overlap heavily.

Concepts

  • build DAGs
  • tenant quotas
  • artifact caching
  • bitmask DP
  • state compression
  • subset enumeration

required={A,B,C}, services=[AB risk 4, C risk 1] -> count=2, risk=5

Approach

Try framing your own approach first. The 30 seconds you think before peeking is where learning happens.

Clean Solution

Reveal the approach first.

How well did you understand?

Your rating tunes when this problem shows up again.

Common Mistakes

  • Do not shift beyond the integer width in fixed-width languages.
  • Keep feature-to-bit mapping stable.

Next Similar Problems

Build Policy State CompressionhardArtifacts Policy State CompressionhardTenancy Policy State Compressionmedium