Top 50 Clustering Interview Questions
The most frequently asked Clustering questions across all roles and companies, ranked by real interview frequency. Updated daily.
Find the largest 4-connected cluster of nonzero cells in a 2D array using iterative DFS.
KLAImplement K-means from scratch by repeatedly assigning points and recomputing centroids.
Infosys
UberGroup 3D lidar points using spatial hashing and union-find when connections are transitively within distance K.
MotionalImplement deterministic K-Means clustering from scratch using squared Euclidean distances and centroid updates.
TubiCount connected clusters of ones in a binary matrix using breadth-first or depth-first search.
General Motors (GM)Compute WCSS by assigning each point to its nearest centroid and summing squared Euclidean distances.
UST GlobalCompute the total squared distance from each point to its assigned cluster centroid using a two-pass algorithm.
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Return the top 3 non-null scores and handle ties using ranking logic.
CapgeminiReturn the first row for each unique value, then rank the k most frequent values.
EverlawBuild a recursive employee hierarchy query that returns each reachable employee, depth, root, and complete reporting path.
ZoomInfo Technologies