coding-practice Coding Problems

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

6523 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
2901	T-SQL subquery above average #17	SQL Server — Subqueries sqlserver coding-practice	—	40	Hard	Solve
2902	Valid parentheses depth #17	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
2903	Above average #18	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2904	Count vowels in "developer" #18	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2905	Map squares #18	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
2906	Map squares #18	React — useEffect react coding-practice	—	30	Medium	Solve
2907	Map squares #18	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
2908	MongoDB relationships #18	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2909	MySQL subquery above avg #18	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2910	PostgreSQL CTE top earners #18	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2911	Queue — simulate task scheduler #18	DSA — Stacks & Queues dsa coding-practice	—	30	Medium	Solve
2912	T-SQL subquery above average #18	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
2913	Above average #19	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
2914	Max in set #19	JavaScript — Objects javascript coding-practice	—	20	Easy	Solve
2915	Max in set #19	React — useEffect react coding-practice	—	20	Easy	Solve
2916	Max in set #19	Node.js — Express patterns nodejs coding-practice	—	20	Easy	Solve
2917	MongoDB relationships #19	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2918	MySQL subquery above avg #19	MySQL — Subqueries mysql coding-practice	—	40	Hard	Solve
2919	PostgreSQL CTE top earners #19	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	40	Hard	Solve
2920	T-SQL subquery above average #19	SQL Server — Subqueries sqlserver coding-practice	—	20	Easy	Solve
2921	Uppercase "code" #19	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2922	Valid parentheses depth #19	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
2923	Above average #20	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2924	MongoDB relationships #20	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2925	MySQL subquery above avg #20	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2926	PostgreSQL CTE top earners #20	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2927	Queue — simulate task scheduler #20	DSA — Stacks & Queues dsa coding-practice	—	30	Medium	Solve
2928	Reduce product #20	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
2929	Reduce product #20	React — useEffect react coding-practice	—	30	Medium	Solve
2930	Reduce product #20	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
2931	String length manual "practice" #20	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2932	T-SQL subquery above average #20	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
2933	Above average #21	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2934	MongoDB relationships #21	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2935	MySQL subquery above avg #21	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2936	PostgreSQL CTE top earners #21	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2937	Reverse "interview" #21	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2938	Sum 1..10 #21	JavaScript — Objects javascript coding-practice	—	40	Hard	Solve
2939	Sum 1..10 #21	React — useEffect react coding-practice	—	40	Hard	Solve
2940	Sum 1..10 #21	Node.js — Express patterns nodejs coding-practice	—	40	Hard	Solve
2941	T-SQL subquery above average #21	SQL Server — Subqueries sqlserver coding-practice	—	40	Hard	Solve
2942	Valid parentheses depth #21	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
2943	Above average #22	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
2944	Count vowels in "csharp" #22	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2945	Filter evens #22	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
2946	Filter evens #22	React — useEffect react coding-practice	—	30	Medium	Solve
2947	Filter evens #22	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
2948	MongoDB relationships #22	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2949	MySQL subquery above avg #22	MySQL — Subqueries mysql coding-practice	—	40	Hard	Solve
2950	PostgreSQL CTE top earners #22	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	40	Hard	Solve

Problem of the day

Graph Valid Tree

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