Trend record / Technology trends

ByteDance Second-Round Interview: Millisecond Lookup of Last 4 Phone Digits in 1 Billion Records, Fail Without “Heterogeneous Indexing”?

字节二面:10亿数据毫秒级查手机尾号后4位,答不出“异构索引”直接挂?

ThreadEast first recorded "ByteDance Second-Round Interview: Millisecond Lookup of Last 4 Phone Digits in 1 Billion Records, Fail Without “Heterogeneous Indexing”?" on Jul 31, 2026, 8:33 PM CST. It has been observed on Juejin, with 35 hours between the first and latest recorded appearances.

1 platformObserved span: 35 hoursLatest observation: Aug 2, 2026, 8:18 AM CST

What the trend data tells us

The English title describes the topic of the source listing. Its appearance in a ranking measures attention within that platform; the ranking alone does not explain the cause of a spike or verify the underlying claim.

Juejin

Latest recorded position: #23 on Aug 2, 2026, 8:18 AM CST.

There are not enough retained observations to calculate a rank change.

This stable URL remains available after a topic leaves a live ranking. Observation span is elapsed time between sightings, not continuous time on a chart. Platforms use different ranking and heat systems; their metrics are not added together.

Original evidence

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