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Updated weekly · Last refresh Oct 17

Yahoo Software Engineer Interview Questions

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

50questions
~10htotal time
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1
CodingStart here. 13 questions · ~158 min
Reverse a SubarrayEasy
Practice

Reverse Yahoo News feed items in contiguous groups of k using an in-place two-pointer algorithm.

AlgorithmsYahoo
Reverse a Linked List In O(n)Easy
Practice

Reverse a singly linked list in O(n) time by rewiring each node's next pointer in place.

Yahoo
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2
System Design13 questions · ~158 min
Design a URL Shortening ServiceHard

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingYahoo
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3
Security & Infrastructure11 questions · ~133 min
What Is a CDN and How It WorksMedium

Assesses infrastructure fundamentals and ability to connect them to engineering practice.

linuxYahoo
Docker vs Virtual MachinesMedium

Assesses containerization fundamentals and deployment tradeoffs.

virtualizationdockerYahoo
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4
Technical Fundamentals5 questions · ~61 min
Java vs Python ComparisonEasy

Assesses your language fundamentals and ability to reason about tradeoffs.

LanguagescomparisonYahoo
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5
Behavioral & Leadership4 questions · ~48 min
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6
More topics4 questions · ~48 min
Java and SQL TopicsMedium

Assesses your understanding of Java language features and relational query concepts.

javasqlYahoo
Time Management for Project GoalsMedium

Evaluates planning, prioritization, and delivery discipline.

time managementYahoo
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
7-Day Rolling Active UsersMedium
Practice
Practice drill

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
Optimize a Slow SQL QueryHard
Practice
Practice drill

Rewrite a slow PostgreSQL loan payment query to reduce scanned rows while preserving the required aggregated results.

database optimizationJoinsData WranglingAmeripriseEEltro Cyberchrome PrivateEnergyHub
Running Total With Window FunctionsEasy
Practice
Practice drill

Calculate each user's running order total over time using a window function.

Window FunctionsDate FunctionsRunning TotalsBayerSparksoftWestern Digital
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.