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Roku Software Engineer Interview Questions

The questions to prepare for a Roku Software Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
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1
CodingStart here. 11 questions · ~132 min
Sort Using an Arbitrary OrderMedium
Practice

Sort strings according to a caller-provided order, then sort unspecified values lexicographically.

ArraysSortingAlgorithmsRoku
Cycle Detection in Linked ListMedium
Practice

Find the entry node of a linked-list cycle using Floyd's tortoise-and-hare algorithm with O(1) extra space.

Data Structurescycle detectionAlgorithmsRoku
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2
System Design11 questions · ~132 min
Distributed Rate LimitingHard

Design a distributed rate limiter that stays accurate under bursty traffic across many servers.

latencydistributed systemsrate limitingRoku
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3
Execution8 questions · ~96 min
Agile Testing ProcessMedium

Explain how testing is planned, automated, executed, and improved within your Agile development process.

automated testingAgileTestingRoku
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4
Technical Fundamentals5 questions · ~60 min
Linux Boot Process ExplanationHard

Trace Linux startup from UEFI or BIOS through the bootloader, kernel, initramfs, and systemd.

linux tuningcli commandstechnical fundamentalsRoku
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5
Security & Infrastructure10 questions · ~120 min
TCP Connection Flow ControlMedium

Tests your understanding of TCP behavior and flow control mechanisms.

NetworkingRoku
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6
Behavioral & Leadership3 questions · ~36 min
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7
More topics2 questions · ~24 min
SQL Join for Top EarnersEasy
Practice

Use ORDER BY and LIMIT to return Roku's two highest-paid employees.

queriesJoinssqlRoku
Cross-Platform Consistency vs OptimizationMedium

Tests product-minded engineering tradeoffs across platforms and performance versus uniform behavior.

cross-functionaluser-centric designRoku

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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
Optimizing Skewed JoinsHard
Practice
Recently asked
Practice drill

Optimize a skewed Roku-scale JOIN by reducing fact rows before joining and separating hot keys from the general workload.

Performance Tuningdatabase optimizationlarge datasetsRoku
Longest Session and AveragesMedium
Practice
Recently asked
Practice drill

Find Roku's longest completed session and average completed session length for each device type.

Date FunctionsJoinsGroup ByRoku
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.