DSA & Coding Problems Explorer

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

8773 problems

#	Title	Topics	Acceptance	Pts	Difficulty
5301	String length manual "practice" #32	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
5302	T-SQL subquery above average #32	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
5303	Above average #33	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
5304	Map squares #33	JavaScript — Objects javascript coding-practice	—	40	Hard	Solve
5305	Map squares #33	React — useEffect react coding-practice	—	40	Hard	Solve
5306	Map squares #33	Node.js — Express patterns nodejs coding-practice	—	40	Hard	Solve
5307	MongoDB relationships #33	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
5308	MySQL subquery above avg #33	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
5309	PostgreSQL CTE top earners #33	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
5310	Reverse "interview" #33	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
5311	T-SQL subquery above average #33	SQL Server — Subqueries sqlserver coding-practice	—	40	Hard	Solve
5312	Valid parentheses depth #33	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
5313	Above average #34	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
5314	Count vowels in "csharp" #34	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
5315	Max in set #34	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
5316	Max in set #34	React — useEffect react coding-practice	—	30	Medium	Solve
5317	Max in set #34	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
5318	MongoDB relationships #34	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
5319	MySQL subquery above avg #34	MySQL — Subqueries mysql coding-practice	—	40	Hard	Solve
5320	PostgreSQL CTE top earners #34	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	40	Hard	Solve
5321	Queue — simulate task scheduler #34	DSA — Stacks & Queues dsa coding-practice	—	30	Medium	Solve
5322	T-SQL subquery above average #34	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
5323	Above average #35	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
5324	MongoDB relationships #35	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
5325	MySQL subquery above avg #35	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
5326	PostgreSQL CTE top earners #35	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
5327	Reduce product #35	JavaScript — Objects javascript coding-practice	—	20	Easy	Solve
5328	Reduce product #35	React — useEffect react coding-practice	—	20	Easy	Solve
5329	Reduce product #35	Node.js — Express patterns nodejs coding-practice	—	20	Easy	Solve
5330	T-SQL subquery above average #35	SQL Server — Subqueries sqlserver coding-practice	—	20	Easy	Solve
5331	Uppercase "toolliyo" #35	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
5332	Valid parentheses depth #35	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
5333	Above average #36	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
5334	MongoDB relationships #36	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
5335	MySQL subquery above avg #36	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
5336	PostgreSQL CTE top earners #36	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
5337	Queue — simulate task scheduler #36	DSA — Stacks & Queues dsa coding-practice	—	30	Medium	Solve
5338	String length manual "developer" #36	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
5339	Sum 1..10 #36	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
5340	Sum 1..10 #36	React — useEffect react coding-practice	—	30	Medium	Solve
5341	Sum 1..10 #36	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
5342	T-SQL subquery above average #36	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
5343	Above average #37	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
5344	Filter evens #37	JavaScript — Objects javascript coding-practice	—	40	Hard	Solve
5345	Filter evens #37	React — useEffect react coding-practice	—	40	Hard	Solve
5346	Filter evens #37	Node.js — Express patterns nodejs coding-practice	—	40	Hard	Solve
5347	MongoDB relationships #37	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
5348	MySQL subquery above avg #37	MySQL — Subqueries mysql coding-practice	—	40	Hard	Solve
5349	PostgreSQL CTE top earners #37	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	40	Hard	Solve
5350	Reverse "code" #37	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve

Problem of the day

Combination Sum II

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