coding-practice Coding Problems

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

6523 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
1651	PostgreSQL JOIN with alias #15	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1652	Reduce product #15	JavaScript — Strings javascript coding-practice	—	20	Easy	Solve
1653	Reduce product #15	Node.js — File System nodejs coding-practice	—	20	Easy	Solve
1654	Reduce product #15	React — State react coding-practice	—	20	Easy	Solve
1655	T-SQL INNER JOIN departments #15	SQL Server — JOINs sqlserver coding-practice	—	20	Easy	Solve
1656	matrix exercise #15	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1657	Container with most water #16	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1658	Join exercise #16	SQL — JOINs sql coding-practice	—	40	Hard	Solve
1659	MongoDB aggregation #16	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1660	MySQL INNER JOIN dept names #16	MySQL — JOINs mysql coding-practice	—	40	Hard	Solve
1661	PostgreSQL JOIN with alias #16	PostgreSQL — JOINs postgresql coding-practice	—	40	Hard	Solve
1662	Sum 1..5 #16	JavaScript — Strings javascript coding-practice	—	30	Medium	Solve
1663	Sum 1..5 #16	Node.js — File System nodejs coding-practice	—	30	Medium	Solve
1664	Sum 1..5 #16	React — State react coding-practice	—	30	Medium	Solve
1665	T-SQL INNER JOIN departments #16	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1666	matrix exercise #16	C# Programs — Matrix csharp coding-practice	—	40	Hard	Solve
1667	Container with most water #17	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1668	Filter evens #17	JavaScript — Strings javascript coding-practice	—	40	Hard	Solve
1669	Filter evens #17	Node.js — File System nodejs coding-practice	—	40	Hard	Solve
1670	Filter evens #17	React — State react coding-practice	—	40	Hard	Solve
1671	Join exercise #17	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1672	MongoDB aggregation #17	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1673	MySQL INNER JOIN dept names #17	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1674	PostgreSQL JOIN with alias #17	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1675	T-SQL INNER JOIN departments #17	SQL Server — JOINs sqlserver coding-practice	—	40	Hard	Solve
1676	matrix exercise #17	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1677	Container with most water #18	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1678	Join exercise #18	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1679	Map squares #18	JavaScript — Strings javascript coding-practice	—	30	Medium	Solve
1680	Map squares #18	Node.js — File System nodejs coding-practice	—	30	Medium	Solve
1681	Map squares #18	React — State react coding-practice	—	30	Medium	Solve
1682	MongoDB aggregation #18	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1683	MySQL INNER JOIN dept names #18	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1684	PostgreSQL JOIN with alias #18	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1685	T-SQL INNER JOIN departments #18	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1686	matrix exercise #18	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1687	Container with most water #19	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1688	Join exercise #19	SQL — JOINs sql coding-practice	—	40	Hard	Solve
1689	Max in set #19	JavaScript — Strings javascript coding-practice	—	20	Easy	Solve
1690	Max in set #19	Node.js — File System nodejs coding-practice	—	20	Easy	Solve
1691	Max in set #19	React — State react coding-practice	—	20	Easy	Solve
1692	MongoDB aggregation #19	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1693	MySQL INNER JOIN dept names #19	MySQL — JOINs mysql coding-practice	—	40	Hard	Solve
1694	PostgreSQL JOIN with alias #19	PostgreSQL — JOINs postgresql coding-practice	—	40	Hard	Solve
1695	T-SQL INNER JOIN departments #19	SQL Server — JOINs sqlserver coding-practice	—	20	Easy	Solve
1696	matrix exercise #19	C# Programs — Matrix csharp coding-practice	—	40	Hard	Solve
1697	Container with most water #20	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1698	Join exercise #20	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1699	MongoDB aggregation #20	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1700	MySQL INNER JOIN dept names #20	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve

Problem of the day

Graph Valid Tree

Medium · +15 pts

Solve today

Weekly leaderboard

View all

Be the first to climb the board this week.

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