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

538problems

100+hours

All Coding Questions

538 questions

Minimum Operations to Sort by Rotate and Flip

NEW

Asked by

BFS

Hard

Merge Values into Blocks

NEW

Asked by

Union Find

Hard

Minimum Redistribution Cost

NEW

Asked by

Prefix Sum

Medium

6 days ago

Filter Unsafe Messages

+1 more

NEW

Asked by

String

Medium

1 days ago

Max Matrix Border Distinct Sum

NEW

Asked by

Array

Medium

Count and Flip Binary Operations

NEW

Asked by

String

Medium

Jumping by Height

Asked by

Simulation

Hard

Find Camera Admin User

Asked by

Graph

Medium

4 days ago

Rank Songs by Popularity

Asked by

Array

Medium

2 weeks ago

Maximize Hole in Prison Gate

Asked by

Greedy

Medium

1 weeks ago

Updated: Jul 9, 2026