Loading…

Skip to main content

CoursesUniverse

Courses Bootcamps AI Interview Pricing

Loading…

Terms of Service Privacy Policy Contact© 2026 CoursesUniverse

CoursesUniverse

Ship real projects in browser-based labs. Learn cloud, AI, DevOps, and security with mentors, career paths, and credentials employers recognize.

coursesuniverse@gmail.com

Platform

Courses
Roadmaps
Tools
Career tools
Tunisia hub
Leaderboard
Books
Exam packs
Categories
Pricing

Company

About
Blog
Contact
FAQ

For business

Corporate training
HRUniverse
Advertise
Coaching

Legal

Terms of Service
Privacy Policy
Login
Sign up

Our partners

© 2026 CoursesUniverse. All rights reserved.

Created by Haithem Mihoubi

Home Courses Practice Paths

Practice

DSA practice problems

80 problems across 20 patterns — the coding-interview grind, organized by technique instead of random order.

Prefer one priority order instead of by-pattern? See the master roadmap

DSA System Design Low-Level Design Concurrency QA & Testing Behavioral

0 / 80 solvedEASY0/30

Coding Practice Problems | CoursesUniverse

MEDIUM0/45

HARD0/5

PatternAll Two Pointers Sliding Window Hash Tables Binary Search DFS / BFS Dynamic Programming Backtracking Trees & BST Heaps & Top-K Elements Linked Lists Intervals Graphs: Union-Find & Topological Sort Greedy Prefix Sum Monotonic Stack Trie (Prefix Tree)Bit Manipulation Two Heaps Cyclic Sort Matrix Traversal

CompanyAll Adobe Airbnb Amazon Apple Bloomberg Google LinkedIn Meta Microsoft Netflix Palantir Snapchat Uber Yelp Zenefits

Difficulty

All Easy Medium Hard

Status

All Unsolved Solved Starred

PatternAll Two Pointers Sliding Window Hash Tables Binary Search DFS / BFS Dynamic Programming Backtracking Trees & BST Heaps & Top-K Elements Linked Lists Intervals Graphs: Union-Find & Topological Sort Greedy Prefix Sum Monotonic Stack Trie (Prefix Tree)Bit Manipulation Two Heaps Cyclic Sort Matrix Traversal

CompanyAll Adobe Airbnb Amazon Apple Bloomberg Google LinkedIn Meta Microsoft Netflix Palantir Snapchat Uber Yelp Zenefits

Difficulty

All Easy Medium Hard

Status

All Unsolved Solved Starred

Heaps & Top-K Elements

Top K Frequent ElementsMEDIUM