Top 21
Prep plan
Updated weekly · Last refresh Oct 17

ADP GenAI Engineer Interview Questions

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

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1
CodingStart here. 3 questions · ~31 min
Reverse Linked List ComplexityEasy
Practice

Reverse a singly linked list in place using pointer reassignment with O(n) time and O(1) extra space.

time complexityLinked ListsData StructuresADP
Maximum Sum Contiguous SubarrayEasy
Practice

Use Kadane's algorithm to find the contiguous subarray with the largest sum in linear time.

Dynamic ProgrammingArraysGreedyADP
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2
Generative AI & LLMs7 questions · ~73 min
Cut LLM Cost Without Quality LossMedium

Redesign a customer-support LLM workflow to cut inference cost by 50%+ while preserving answer quality, latency, and safety.

Prompt EngineeringRAGLLM EvaluationADP
Explain Self-Attention in TransformersMedium

Explain how self-attention works and why it is central to transformer-based LLMs.

Neural NetworksPrompt EngineeringDeep LearningADP
Choose Between RAG and Fine-TuningEasy

Compare RAG and fine-tuning, and decide when each is the better fit for an LLM product.

ADP
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3
System Design3 questions · ~31 min
Designing a GenAI SystemMedium

Assesses your ability to design a scalable GenAI architecture and communicate it clearly.

architectureADP
Enterprise HR Assistant DesignHard

Tests your ability to design scalable GenAI systems tailored to ADP's HR and payroll domain needs.

Feature StoreModel ServingRecommendation SystemsADP
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4
Behavioral & Leadership7 questions · ~73 min
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5
More topics1 question · ~10 min
ADP GenAI Project ArchitectureMedium

Tests your ability to explain architecture decisions and tradeoffs in complex GenAI systems.

project experiencedesign rationaletechnical depthADP
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