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Implement a log-structured event store for fleet metrics with range queries and compaction.

Build a complete segmented metrics-store reference with duplicate-safe range queries, visible retention and tested compaction.

Updated Sep 2026 · Learn how AI infrastructure works through explanations, worked examples and diagrams, then practise applying it to interview questions.

Build a complete segmented metrics-store reference with duplicate-safe range queries, visible retention and tested compaction.

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The concepts behind this question

Use these concept explanations to review the ideas behind this question.

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⚡ Kernels & Compilers🔒 Premium

Parallel Prefix Scan and Stream CompactionA prefix scan gives every item the aggregate of earlier items. It turns per-item counts into disjoint output offsets and enables stable compaction, provided block carries and integer limits are handled correctly.

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💻 Coding for Infra

The Practical Coding Screen PlaybookA practical coding interview asks you to build and explain a small system. A clear contract, working core and tests make follow-up changes easier to reason about.

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📐 AI Systems Design🔒 Premium

Model Metadata and Artifact StorageModel files and release records have different storage needs. Immutable artifacts and a controlled release pointer help prevent partially uploaded models from reaching users.

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🖧 Hardware & Cluster Build-Out

The Bill of Materials for a Training ClusterA cluster bill of materials includes networking, storage, management, power, cooling and spares as well as GPUs. Size each from the workload and topology.

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Next in this trackA multi-GPU training job hangs at step 400 with every GPU at 100 percent utilization. Debug it.Next in this trackImplement byte-pair encoding merges, then explain why token counts differ across languages Next in this trackImplement beam search without losing finished hypotheses or corrupting KV ownership

FEDITOR'S NOTE

Look for explicit ordering and range contracts, complete runnable code, correct pruning claims and separate persistence requirements.

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