KhataBook Interview Questions
The questions to prepare for KhataBook interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Determine sample size and power for a customer survey or experiment, including MDE, guardrails, and a disciplined decision rule.
Explain how you would prioritize competing operational work when resources are tight and stakeholders want different outcomes.
Implement an LFU cache with LRU tie-breaking and O(1) get and put operations.
Calculate each user's 7-day rolling order volume average, including calendar days with no orders.
Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.
Maintain a streaming median using a max heap for the lower half and a min heap for the upper half.
Explain how to profile, clean, and standardize missing or dirty data before analysis.
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Approach a mixed interview round while summarizing completed activity with a CTE, aggregation, and left join.
WiseReturn the first row for each unique value, then rank the k most frequent values.
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