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Data-Centric Algorithmic Problem Solving Questions

Foundational algorithm design and data-structure concepts with an emphasis on data-centric problem solving. Covers algorithmic paradigms (e.g., greedy, dynamic programming, divide-and-conquer, graph algorithms), data structures, complexity analysis, and practical approaches to solving computational problems using data.

MediumTechnical
0 practiced
Implement Union-Find (Disjoint Set) with path compression and union by rank in Python. Then use it to detect whether an undirected graph (edge list) contains a cycle. Provide time/space complexity analysis.
EasyTechnical
0 practiced
Compare arrays (dynamic arrays / Python lists) vs linked lists: explain differences in memory layout, random access, insertion/deletion cost, cache behavior, and typical library support in Python or R. As a data scientist, when might you prefer one over the other?
EasyTechnical
0 practiced
Explain the bias-variance tradeoff in supervised learning. Provide examples of models that tend to have high bias vs high variance and list practical techniques to address each (regularization, ensembling, feature selection).
HardTechnical
0 practiced
Outline an algorithmic approach for real-time anomaly detection on high-dimensional streaming telemetry. Cover feature extraction, dimensionality reduction, online model choices (e.g., incremental PCA, streaming isolation forest), concept drift detection, and how to evaluate alarms in production.
EasyTechnical
0 practiced
Explain prefix sums (cumulative sums) and how they can be used to answer range sum queries in O(1) after O(n) preprocessing. Then extend the idea to 2D prefix sums and describe a use-case in image processing or heatmaps.

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