DSA & Coding Problems Explorer

All C# Programs — Data Structures 167 DSA — Two Pointers 105 C# Programs — Arrays 105 DSA — Dynamic Programming 105 DSA — Binary Search 105 DSA — Stacks & Queues 105 DSA — Hashing 105 DSA — Trees 105 DSA — Strings 105 DSA — Graphs 105 C# Programs — Strings 105 DSA — Arrays 105 DSA — Sorting 105 C# Programs — LINQ 104 C# Programs — Collections 103 C# Programs — Sorting 103 C# Programs — OOP 103 C# Programs — Inheritance 101 SQL Server — Indexes & plans 101 SQL Server — DDL & constraints 101 C# Programs — Interfaces 101 SQL Server — SELECT basics 101 SQL Server — WHERE & filtering 101 SQL Server — Window functions 101 SQL Server — T-SQL procedures 101 SQL Server — Aggregates & GROUP BY 101 SQL Server — CTEs 101 SQL Server — JOINs 101

8773 problems

#	Title	Topics	Acceptance	Pts	Difficulty
4701	First duplicate in array #34	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
4702	Max in set #34	React — Hooks react coding-practice	—	30	Medium	Solve
4703	Max in set #34	JavaScript — Functions javascript coding-practice	—	30	Medium	Solve
4704	Max in set #34	Node.js — HTTP nodejs coding-practice	—	30	Medium	Solve
4705	MongoDB indexing #34	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
4706	MySQL AVG salary by dept #34	MySQL — Aggregates & GROUP BY mysql coding-practice	—	40	Hard	Solve
4707	PostgreSQL GROUP BY HAVING #34	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	40	Hard	Solve
4708	T-SQL AVG salary by department #34	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
4709	math exercise #34	C# Programs — Mathematical Functions csharp coding-practice	—	40	Hard	Solve
4710	Avg by category #35	SQL — Aggregates & GROUP BY sql coding-practice	—	30	Medium	Solve
4711	First duplicate in array #35	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
4712	MongoDB indexing #35	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
4713	MySQL AVG salary by dept #35	MySQL — Aggregates & GROUP BY mysql coding-practice	—	30	Medium	Solve
4714	PostgreSQL GROUP BY HAVING #35	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	30	Medium	Solve
4715	Reduce product #35	React — Hooks react coding-practice	—	20	Easy	Solve
4716	Reduce product #35	Node.js — HTTP nodejs coding-practice	—	20	Easy	Solve
4717	Reduce product #35	JavaScript — Functions javascript coding-practice	—	20	Easy	Solve
4718	T-SQL AVG salary by department #35	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	20	Easy	Solve
4719	math exercise #35	C# Programs — Mathematical Functions csharp coding-practice	—	30	Medium	Solve
4720	Avg by category #36	SQL — Aggregates & GROUP BY sql coding-practice	—	30	Medium	Solve
4721	First duplicate in array #36	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
4722	MongoDB indexing #36	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
4723	MySQL AVG salary by dept #36	MySQL — Aggregates & GROUP BY mysql coding-practice	—	30	Medium	Solve
4724	PostgreSQL GROUP BY HAVING #36	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	30	Medium	Solve
4725	Sum 1..10 #36	Node.js — HTTP nodejs coding-practice	—	30	Medium	Solve
4726	Sum 1..10 #36	React — Hooks react coding-practice	—	30	Medium	Solve
4727	Sum 1..10 #36	JavaScript — Functions javascript coding-practice	—	30	Medium	Solve
4728	T-SQL AVG salary by department #36	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
4729	math exercise #36	C# Programs — Mathematical Functions csharp coding-practice	—	30	Medium	Solve
4730	Avg by category #37	SQL — Aggregates & GROUP BY sql coding-practice	—	40	Hard	Solve
4731	Filter evens #37	React — Hooks react coding-practice	—	40	Hard	Solve
4732	Filter evens #37	JavaScript — Functions javascript coding-practice	—	40	Hard	Solve
4733	Filter evens #37	Node.js — HTTP nodejs coding-practice	—	40	Hard	Solve
4734	First duplicate in array #37	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
4735	MongoDB indexing #37	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
4736	MySQL AVG salary by dept #37	MySQL — Aggregates & GROUP BY mysql coding-practice	—	40	Hard	Solve
4737	PostgreSQL GROUP BY HAVING #37	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	40	Hard	Solve
4738	T-SQL AVG salary by department #37	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	40	Hard	Solve
4739	math exercise #37	C# Programs — Mathematical Functions csharp coding-practice	—	40	Hard	Solve
4740	Avg by category #38	SQL — Aggregates & GROUP BY sql coding-practice	—	30	Medium	Solve
4741	First duplicate in array #38	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
4742	Map squares #38	React — Hooks react coding-practice	—	30	Medium	Solve
4743	Map squares #38	Node.js — HTTP nodejs coding-practice	—	30	Medium	Solve
4744	Map squares #38	JavaScript — Functions javascript coding-practice	—	30	Medium	Solve
4745	MongoDB indexing #38	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
4746	MySQL AVG salary by dept #38	MySQL — Aggregates & GROUP BY mysql coding-practice	—	30	Medium	Solve
4747	PostgreSQL GROUP BY HAVING #38	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	30	Medium	Solve
4748	T-SQL AVG salary by department #38	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
4749	math exercise #38	C# Programs — Mathematical Functions csharp coding-practice	—	30	Medium	Solve
4750	Avg by category #39	SQL — Aggregates & GROUP BY sql coding-practice	—	30	Medium	Solve

Problem of the day

Min Stack

Medium · +15 pts

Solve today

Weekly leaderboard

View all

1 Pratik Chopade 1 solved

Company sheets

Toolliyo unique — practice by hiring company.

Google Amazon Microsoft Meta Apple Netflix TikTok LinkedIn Nvidia Uber

Browse all companies

Interview path

DSA Interview 150 All roadmaps 3,700+ Interview Q&A

Problems explorer