Counters, Top-K & Sketches

Distributed counters, HyperLogLog, count-min sketch, quantile sketches, and exact vs approximate counts.

0 / 6 solved
0/6 solved
Question Tags Difficulty Success
1. Row Lock Roulette
distributed-counterwrite-contention +1
Easy —
2. Wrong Kind Of Average
approximate-quantilest-digest +1
Medium —
3. Sixty Five Thousand Either Way
hyperloglogcardinality-estimation +2
Medium —
4. Minimum Of The Rows
count-min-sketchheavy-hitters +2
Medium —
5. Merge Without Regret
sketchesmergeability +3
Hard —
6. Overlap On A Budget
hyperloglogcardinality-estimation +1
Hard —

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