coding-practice Coding Problems

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

6523 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
2851	String length manual "developer" #12	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2852	T-SQL subquery above average #12	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
2853	Above average #13	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
2854	Map squares #13	JavaScript — Objects javascript coding-practice	—	40	Hard	Solve
2855	Map squares #13	React — useEffect react coding-practice	—	40	Hard	Solve
2856	Map squares #13	Node.js — Express patterns nodejs coding-practice	—	40	Hard	Solve
2857	MongoDB relationships #13	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2858	MySQL subquery above avg #13	MySQL — Subqueries mysql coding-practice	—	40	Hard	Solve
2859	PostgreSQL CTE top earners #13	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	40	Hard	Solve
2860	Reverse "code" #13	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2861	T-SQL subquery above average #13	SQL Server — Subqueries sqlserver coding-practice	—	40	Hard	Solve
2862	Valid parentheses depth #13	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
2863	Above average #14	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2864	Count vowels in "practice" #14	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2865	Max in set #14	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
2866	Max in set #14	React — useEffect react coding-practice	—	30	Medium	Solve
2867	Max in set #14	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
2868	MongoDB relationships #14	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2869	MySQL subquery above avg #14	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2870	PostgreSQL CTE top earners #14	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2871	Queue — simulate task scheduler #14	DSA — Stacks & Queues dsa coding-practice	—	30	Medium	Solve
2872	T-SQL subquery above average #14	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
2873	Above average #15	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2874	MongoDB relationships #15	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2875	MySQL subquery above avg #15	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2876	PostgreSQL CTE top earners #15	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2877	Reduce product #15	JavaScript — Objects javascript coding-practice	—	20	Easy	Solve
2878	Reduce product #15	React — useEffect react coding-practice	—	20	Easy	Solve
2879	Reduce product #15	Node.js — Express patterns nodejs coding-practice	—	20	Easy	Solve
2880	T-SQL subquery above average #15	SQL Server — Subqueries sqlserver coding-practice	—	20	Easy	Solve
2881	Uppercase "interview" #15	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2882	Valid parentheses depth #15	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
2883	Above average #16	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
2884	MongoDB relationships #16	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2885	MySQL subquery above avg #16	MySQL — Subqueries mysql coding-practice	—	40	Hard	Solve
2886	PostgreSQL CTE top earners #16	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	40	Hard	Solve
2887	Queue — simulate task scheduler #16	DSA — Stacks & Queues dsa coding-practice	—	30	Medium	Solve
2888	String length manual "csharp" #16	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2889	Sum 1..5 #16	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
2890	Sum 1..5 #16	React — useEffect react coding-practice	—	30	Medium	Solve
2891	Sum 1..5 #16	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
2892	T-SQL subquery above average #16	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
2893	Above average #17	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2894	Filter evens #17	JavaScript — Objects javascript coding-practice	—	40	Hard	Solve
2895	Filter evens #17	React — useEffect react coding-practice	—	40	Hard	Solve
2896	Filter evens #17	Node.js — Express patterns nodejs coding-practice	—	40	Hard	Solve
2897	MongoDB relationships #17	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2898	MySQL subquery above avg #17	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2899	PostgreSQL CTE top earners #17	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2900	Reverse "toolliyo" #17	C# Programs — Strings csharp coding-practice	—	20	Easy	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