Top 50
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~10h total · Updated weekly · Last refresh Jul 24

Top 50 Matrix Interview Questions

The most frequently asked Matrix questions across all roles and companies, ranked by real interview frequency. Updated weekly.

Count Islands in a Grid
Medium

Use DFS on a matrix-as-graph to count connected components of land cells.

MatrixGraphs
NaviTwitch
Matrix Row-Column Equality
Medium

Tests ability to reason about 2D data structures and implement efficient checks.

Hash TablesArraysMatrix
Recently asked
Snap
Compute Series Parallel Resistance
Easy

Evaluate a resistor network described by operations and resistor values using array-based stack processing.

MathArraysMatrix
Recently asked
NVIDIA
Rotate Square Matrix In Place
Medium

Rotate an n x n matrix 90 degrees clockwise in place using transpose and row reversal.

Array ManipulationMatrix
Capital One
Complete Shape Grid Rows Columns
Easy

Fill a partially completed shape grid so each row and column contains each shape exactly once using set-based search.

SearchingMatrix
Rolls-Royce
Find Missing Rotating Object
Easy

Determine the missing 3D object by identifying a consistent rotation pattern across a sequence of cube views.

SearchingGreedyMatrix
Rolls-Royce
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