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Data Structure & Algorithm

Coding Question

Practice the most tested coding interview topics: arrays, graphs, trees and dynamic programming. Problems tagged by company frequency and difficulty level.

Highlights

Real coding questions reported in top-tier technical interviews

Optimal solutions with time & space complexity explained

Covers arrays, trees, graphs, recursion & all core DSA topics

Tagged by company frequency & difficulty level

24k+ students

20k+ reported

530 problems

100+ hours

All Types

Difficulty

Frequency

Last Reported

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StringTrie

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Medium

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ArrayMatrix

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Medium

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StringArray

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Medium

-

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SimulationHash Table

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Hard

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ArraySorting

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Medium

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Union Find

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Medium

1 months ago

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ToDo List with Task Dependencies

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DesignHash Table

Asked By

Medium

-

Updated: Jun 15, 2026

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