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Amazon Lab126 Applied Scientist Interview Questions

The questions to prepare for a Amazon Lab126 Applied Scientist interview. Questions from real interview reports rank first. Updated weekly.

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1
CodingStart here. 8 questions · ~77 min
Longest Subarray Sum Equals KMedium
Practice

Find the longest contiguous subarray whose sum equals K using prefix sums and a hash map.

ArraysAmazon Lab126
Reverse Linked List In-PlaceEasy
Practice

Reverse a singly linked list in place by rewiring next pointers in one pass.

Linked ListsAlgorithmsAmazon Lab126
Analyze Time and Space ComplexityEasy

Explain how to derive time and space complexity for a coding solution and justify the final Big O bounds.

Hash TablesArraysSortingAmazon Lab126
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2
Machine Learning9 questions · ~87 min
Architecture Choice Tradeoff ExplanationMedium

Explain how you weighed accuracy, generalization, complexity, and operational constraints when selecting a model architecture.

Decision MakingTrade-offsarchitectureAmazon Lab126
Upsampling and DownsamplingMedium

Evaluates your DSP fundamentals and how they relate to signal and model pipelines.

Amazon Lab126
Linear vs Logistic RegressionMedium

Evaluates your understanding of modeling assumptions, outputs, and use cases.

linear regressionAmazon Lab126
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3
Behavioral & Leadership8 questions · ~77 min
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4
More topics2 questions · ~19 min
Object Detection System DesignHard

Evaluates your ability to design an end-to-end object detection approach for robotics constraints.

system designAmazon Lab126
Large-Scale Data StreamsHard

Assesses your system design skills for throughput, latency, and reliability in streaming.

system designdata processingscalabilityAmazon Lab126
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