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Top 50 performance analysis Interview Questions

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

50questions
~20htotal time
70companies covered
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1
CodingStart here. 39 questions · ~932 min
Merge Overlapping Time IntervalsMedium
Practice
Recently asked

Merge overlapping intervals by sorting on start time, then scanning once to combine intersecting ranges.

time complexityAlgorithmsperformance analysisDatadogWurlFuku
Real-Time Telemetry Window StoreMedium
Practice
Recently asked

Process telemetry stream operations with a sliding-window data structure that answers average and maximum queries efficiently.

time complexityData Structuresperformance analysisAbm IndustriesRivianAnduril Industries
Optimize String Pattern AnalysisMedium
Practice
Recently asked

Find the longest substring without repeated characters using a sliding window and last-seen index map.

time complexityStringsData StructuresWarner Music GroupCodeSignalSupermicro
Reverse UTF-8 Under ConstraintsHard
Practice
Recently asked

Reverse valid UTF-8 bytes by code point without corrupting multibyte characters.

ArraysStringspythonOscar Health
Moving Average Over Sensor DataMedium
Practice

Compute each fixed-size sensor-reading average efficiently using a sliding window instead of repeatedly summing overlapping ranges.

aggregationArraysSliding WindowBBombardierAlarm
Dynamic Programming Resource OptimizationHard
Practice
Recently asked

Use tree knapsack dynamic programming to maximize resource value across a rooted server network under a budget.

Dynamic ProgrammingData StructuresAlgorithmsRoblox
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2
SQL & Data Manipulation11 questions · ~263 min
SQL Query for Top ProductsMedium
Practice

Rank Natural Intelligence products by completed revenue in the last completed quarter using joins, aggregation, and a date CTE.

sql queryperformance analysisNatural IntelligenceChewyFavor
Top-Performing Products QueryMedium
Practice

Rank Tesco products by Q2 revenue using a date-filtered join, aggregation, and RANK window function.

sqlperformance analysisMI SelectTTesco
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