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Top 50 data processing Interview Questions

The most frequently asked data processing questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~14htotal time
273companies covered
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1
CodingStart here. 24 questions · ~398 min
Sliding Window OptimizationMedium
Practice
Recently asked

Find the longest contiguous TikTok Shop product sequence containing at most k distinct products using a sliding window.

data processingSliding WindowoptimizationTikTok ShopAmazon Web Services
Metrics Anomaly DetectionHard
Practice

Detect robust outliers in Zoox telemetry using a rolling median and MAD with logarithmic updates.

data processinganomaly detectionZooxNVIDIA
Stream Pattern DetectionHard
Practice

Use an Aho-Corasick automaton to detect overlapping activity patterns for Bumble Date users in one stream pass.

Stream Processingdata processingBumbleHotstar
Final Value From Stock PricesMedium
Practice
Recently asked

Compute the maximum final cash value from daily stock prices using two-state dynamic programming with a transaction fee.

data processingPalantir technologiesPalantir
Parse and Normalize TransactionsHard
Practice

Parse messy Plaid transaction records, normalize fields, and deduplicate valid transactions in one pass.

data cleaningdata processingStringsPlaid
Increasing-Order Input OutputMedium
Practice
Recently asked

Use per-user state and hash-map counting to find the most frequent station-to-station route in ordered Axon Respond events.

data processingAxon
Most Frequent Review Across LocationsMedium
Practice
Recently asked

Deduplicate reviews within each location, then use hash maps to find the most frequent review across locations.

data processingpythonMeta
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2
SQL & Data Manipulation5 questions · ~83 min
LeetCode SQL PracticeEasy
Practice
Recently asked

Count unique normalized KPIT portal emails using PostgreSQL string functions and COUNT(DISTINCT).

Codingdata processingKaiser PermanenteKpit
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3
Pipelines11 questions · ~182 min
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4
Execution8 questions · ~133 min
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5
More topics2 questions · ~33 min
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