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Lg Ad Solutions Interview Questions

The questions to prepare for Lg Ad Solutions interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

50questions
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1
CodingStart here. 4 questions · ~38 min
Directed Graph Cycle DetectionMedium
Practice

Determine whether a directed graph contains a cycle using DFS or topological sorting.

RecursionGraphsLg Ad Solutions
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2
Execution7 questions · ~66 min
Roadmap With Competing PrioritiesHard
Recently asked

Build and execute an engineering roadmap when product, reliability, and platform priorities compete for the same team capacity.

RoadmappingScope ManagementPrioritizationLg Ad Solutions
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3
Metrics7 questions · ~66 min
Choose a Product North StarMedium
Recently asked

Pick a North Star Metric that reflects customer value, business impact, and long-term product health.

Product-Market FitNorth Star MetricKPIsLg Ad Solutions
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4
SQL & Data Manipulation6 questions + 3 drills · ~87 min
Optimize Large PostgreSQL Query PerformanceMedium

Explain how to tune slow PostgreSQL queries on multi-million-row tables using indexes, execution plans, joins, and partitioning.

Performance Tuningquery optimizationsqlLg Ad Solutions
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Top Users by Recent Transaction VolumeMedium
Practice
Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 BankRevolutChime
Identify Funnel Bottlenecks in OnboardingHard
Practice
Practice drill

Use joins, CTEs, and aggregations to find the weakest step in an onboarding funnel and estimate lost conversions.

Funnel AnalysissqlDiagnosisAtlassianRevolut
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5
Pipelines4 questions · ~38 min
Design Real-Time Ad Event PipelineHard

Design a low-latency ad event pipeline processing up to 900K events/sec with accurate click and impression aggregates for reporting and billing.

InfrastructureStream ProcessingIdempotencyLg Ad Solutions
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6
Statistics & Probability7 questions · ~66 min
Correlation vs Causation in GrowthEasy

Explain why a campaign can correlate with growth without causing it, and how to tell the difference.

ExperimentationCorrelationCausal InferenceLg Ad Solutions
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7
More topics15 questions · ~142 min
Rate Limiting for API GatewayHard

Tests your system design skills for correctness, performance, and operational reliability under load.

InfrastructurelatencyLg Ad Solutions
Estimate Active Smart TVsMedium

Tests estimation skills and ability to build a defensible top-down model.

EstimationProblem SolvingMarket SizingLg Ad Solutions
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.