Scope

Fifteen systems problems were used, from distributed architecture and analytics pipelines to lock-free structures and x86/TSO memory semantics.

Score

• Overall average: ~6.0 / 10
• Best single section: real-time analytics design

Strength Pattern

• Performs well in layered pipeline design (ingest, process, serve)
• Good retry and dedup modeling
• Good interview-level architecture communication

Failure Pattern

• Consensus and cross-region correctness are shallow
• Numeric capacity estimates are often optimistic
• Failure-first analysis is incomplete
• MPMC and minimal synchronization details are inconsistent

Verdict

Useful for structured design drafts. Not reliable yet for high-risk distributed correctness or low-level concurrency proof work.