Data Structure & Algorithm

Coding Question

What's Included

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

560problems

100+hours

All Coding Questions

560 questions

Group Loans by Top-Level Company

+1 more

NEW

Asked by

Hash Table

Medium

Streaming Stop Token

+1 more

NEW

Asked by

String

Hard

1 days ago

Count Maximum Borrowing Days

NEW

Asked by

Greedy

Medium

Simulate a Deterministic Finite Automaton

NEW

Asked by

String

Easy

Merge Unique Arrays

NEW

Asked by

Array

Easy

Minimum Operations to Sort by Rotate and Flip

Asked by

BFS

Hard

1 months ago

Merge Values into Blocks

Asked by

Union Find

Hard

2 days ago

Minimum Redistribution Cost

Asked by

Prefix Sum

Medium

6 days ago

Filter Unsafe Messages

+1 more

Asked by

String

Medium

2 days ago

Max Matrix Border Distinct Sum

Asked by

Array

Medium

Updated: Aug 19, 2026