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Updated weekly · Last refresh Aug 30

Yahoo Software Engineer Interview Questions

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

50questions
~9htotal time
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1
CodingStart here. 15 questions · ~163 min
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysYahoo
Implement Binary Search AlgorithmEasy
Practice

Write a binary search function to find a target value in a sorted array.

SearchingYahoo
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2
System Design15 questions · ~163 min
Design a URL Shortening ServiceHard

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

Feature StoreModel ServingYahoo
Modernizing Search Web ArchitectureMedium

Tests system design judgment for search services, migration, and architecture evolution.

system designdistributed systemsarchitectureYahoo
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3
Security & Infrastructure11 questions · ~120 min
OS Concepts: Paging and ThrashingHard

Tests depth of OS fundamentals relevant to performance and memory behavior.

Hardwaretechnicalos internalsYahoo
What Is a CDN and How It WorksMedium

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

linuxYahoo
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4
SQL & Data Manipulation3 questions + 3 drills · ~63 min
Java and SQL TopicsMedium

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

javasqlYahoo
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
Join and Aggregate by DayMedium
Practice
Practice drill

Aggregate Yahoo Mail messages and ad clicks by day using joins, CTEs, date extraction, and conditional aggregation.

Date FunctionsJoinsAggregationsYahoo
Retention by Cohort SQLHard
Practice
Practice drill

Calculate Yahoo Mail monthly cohort retention with multi-level CTEs, calendar periods, deduplicated activity, and retention percentages.

Window FunctionsDate FunctionsAggregationsYahoo
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5
Behavioral & Leadership4 questions · ~44 min
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6
More topics2 questions · ~22 min
Time Management for Project GoalsMedium

Evaluates planning, prioritization, and delivery discipline.

time managementYahoo
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.