Multiple Choice

You upsert a document and query for it 200 milliseconds later, but it never appears. Pick the most likely cause.

PremiumA news product ingests…

PremiumPick between int8 scalar…

Pick the right billing model for a search feature that bursts to 2,000 QPS one hour per day.

One billion vectors must live mostly on cheap storage with a 200 ms budget. Decide between SPANN style and DiskANN style designs.

During a background reindex, p99 latency triples while p50 barely moves. Pick the explanation.

Your nightly index rebuild takes 14 hours on CPU and the maintenance window is 2 hours. Pick the most direct fix.

Pick the workload where an object storage backed serverless vector database beats a RAM resident cluster on cost.

EU users see yesterday's documents while US users see today's. Debug this geo replicated vector deployment.

PremiumA tenant demands full…

A filtered query with k=20 returns only 4 hits even though 50,000 vectors pass the filter. Pick the fix.

Your filters hit anywhere from 0.5% to 50% of the corpus depending on the query. Pick the filtered ANN strategy that survives both extremes.

Estimate the parameters weight tying saves a 128k-vocab model at d_model 2048

PremiumPinpoint the mechanism that…

Reason about KV cache growth in a sliding window model pushed to 32k tokens

Explain why raising the RoPE base theta helps a model accept longer contexts

Pick the real reason Llama class models swapped LayerNorm for RMSNorm

PremiumExplain how a layer…

Choose the positional scheme that fails hardest when context quadruples at inference

Identify what changes when a block computes attention and FFN in parallel, PaLM style

Interpret what the logit lens reveals when you unembed intermediate layers

Identify which tensors your inference server actually stores in the KV cache

Justify why hybrid SSM models like Jamba still keep a slice of attention layers

Anticipate what breaks when you bolt naive early exit onto a decoder at inference

Annotators keep marking ties between responses: decide how to treat them