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Updated weekly · Last refresh Aug 30

Gallup Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 15 questions · ~128 min
Linked List ReversalEasy
Practice

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

RecursionLinked ListsArraysGallup
Implement Binary SearchEasy

Tests algorithm implementation skills and correctness reasoning.

RecursionArraysSearchingGallup
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2
SQL & Data Manipulation3 questions + 3 drills · ~56 min
Optimizing Slow QueriesMedium

Tests performance tuning skills and understanding of query execution.

JoinsData WranglingCTEsGallup
SQL and Database FundamentalsEasy

Tests your foundational SQL and database knowledge and ability to describe practical experience.

JoinsData WranglingAggregationsGallup
SQL and Java 8 FundamentalsMedium

Assesses practical database and modern Java skills used in real development.

javasqlGallup
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
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
3
Behavioral & Leadership29 questions · ~248 min
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4
More topics3 questions · ~26 min
Recover a Project Off TrackEasy

Explain how you would recover a project that is slipping, balancing risks, scope, stakeholder expectations, and delivery trade-offs.

Rollback PlanTrade-offsRisk AssessmentGallup
Applying SOLID PrinciplesMedium

Assesses design discipline and maintainability practices using SOLID.

design patternsGallup
Prioritize Features for New LaunchMedium

Explain how you would prioritize launch features when stakeholders want different things and the first release needs clear success criteria.

Trade-offsFeature PrioritizationRoadmappingGallup

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