coding-practice Coding Problems

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

6523 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
1851	PostgreSQL JOIN with alias #35	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1852	Reduce product #35	JavaScript — Strings javascript coding-practice	—	20	Easy	Solve
1853	Reduce product #35	Node.js — File System nodejs coding-practice	—	20	Easy	Solve
1854	Reduce product #35	React — State react coding-practice	—	20	Easy	Solve
1855	T-SQL INNER JOIN departments #35	SQL Server — JOINs sqlserver coding-practice	—	20	Easy	Solve
1856	matrix exercise #35	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1857	Container with most water #36	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1858	Join exercise #36	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1859	MongoDB aggregation #36	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1860	MySQL INNER JOIN dept names #36	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1861	PostgreSQL JOIN with alias #36	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1862	Sum 1..10 #36	React — State react coding-practice	—	30	Medium	Solve
1863	Sum 1..10 #36	JavaScript — Strings javascript coding-practice	—	30	Medium	Solve
1864	Sum 1..10 #36	Node.js — File System nodejs coding-practice	—	30	Medium	Solve
1865	T-SQL INNER JOIN departments #36	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1866	matrix exercise #36	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1867	Container with most water #37	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1868	Filter evens #37	Node.js — File System nodejs coding-practice	—	40	Hard	Solve
1869	Filter evens #37	React — State react coding-practice	—	40	Hard	Solve
1870	Filter evens #37	JavaScript — Strings javascript coding-practice	—	40	Hard	Solve
1871	Join exercise #37	SQL — JOINs sql coding-practice	—	40	Hard	Solve
1872	MongoDB aggregation #37	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1873	MySQL INNER JOIN dept names #37	MySQL — JOINs mysql coding-practice	—	40	Hard	Solve
1874	PostgreSQL JOIN with alias #37	PostgreSQL — JOINs postgresql coding-practice	—	40	Hard	Solve
1875	T-SQL INNER JOIN departments #37	SQL Server — JOINs sqlserver coding-practice	—	40	Hard	Solve
1876	matrix exercise #37	C# Programs — Matrix csharp coding-practice	—	40	Hard	Solve
1877	Container with most water #38	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1878	Join exercise #38	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1879	Map squares #38	Node.js — File System nodejs coding-practice	—	30	Medium	Solve
1880	Map squares #38	JavaScript — Strings javascript coding-practice	—	30	Medium	Solve
1881	Map squares #38	React — State react coding-practice	—	30	Medium	Solve
1882	MongoDB aggregation #38	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1883	MySQL INNER JOIN dept names #38	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1884	PostgreSQL JOIN with alias #38	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1885	T-SQL INNER JOIN departments #38	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1886	matrix exercise #38	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1887	Container with most water #39	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1888	Join exercise #39	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1889	Max in set #39	JavaScript — Strings javascript coding-practice	—	20	Easy	Solve
1890	Max in set #39	React — State react coding-practice	—	20	Easy	Solve
1891	Max in set #39	Node.js — File System nodejs coding-practice	—	20	Easy	Solve
1892	MongoDB aggregation #39	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1893	MySQL INNER JOIN dept names #39	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1894	PostgreSQL JOIN with alias #39	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1895	T-SQL INNER JOIN departments #39	SQL Server — JOINs sqlserver coding-practice	—	20	Easy	Solve
1896	matrix exercise #39	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1897	Container with most water #40	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1898	Join exercise #40	SQL — JOINs sql coding-practice	—	40	Hard	Solve
1899	MongoDB aggregation #40	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1900	MySQL INNER JOIN dept names #40	MySQL — JOINs mysql coding-practice	—	40	Hard	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