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Updated weekly · Last refresh Aug 30

Lg Ad Solutions Software Engineer Interview Questions

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

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1
CodingStart here. 4 questions · ~47 min
Lowest Common Ancestor in BSTEasy
Practice

Find the lowest common ancestor of two nodes in a binary search tree using BST ordering.

RecursionTreesLg Ad Solutions
Reverse a Singly Linked ListEasy
Practice

Problem Given the head of a singly linked list, reverse the list, and return the new head node. The linked list is defined as follows: python class ListNo...

RecursionStackDynamic ProgrammingLg Ad Solutions
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2
Pipelines4 questions · ~47 min
Multi-Region IaC Pipeline ConsistencyMedium

Approach for managing infrastructure as code so environments stay consistent across global regions.

Infrastructureinfrastructure as codeAutomationLg Ad Solutions
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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3
Behavioral & Leadership5 questions · ~59 min
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4
More topics5 questions · ~59 min
Video-On-Demand CDN DesignHard

Tests your CDN and streaming architecture knowledge for latency, throughput, and reliability.

InfrastructureLaunch PlanningTrade-offsLg Ad Solutions
Ad Serving With Budget PacingHard

Tests your ability to design an ad-tech system that enforces pacing and frequency controls for unduplicated reach.

ML RankingFeature StoreRecommendation SystemsLg Ad Solutions
Handling Interrupts in OSMedium

Evaluates understanding of interrupt generation and OS-level interrupt handling mechanisms.

Operating SystemsinterruptsLg Ad Solutions
Auto-Scaling Cloud Resource OptimizationMedium

Tests your ability to balance cost and performance using scaling strategies and workload-aware tuning.

Trade-offsExecutionResource AllocationLg Ad Solutions
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The finish line: interview-readyComplete all 18 questions to finish this plan.