coding-practice Coding Problems

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

6523 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
1901	PostgreSQL JOIN with alias #40	PostgreSQL — JOINs postgresql coding-practice	—	40	Hard	Solve
1902	Reduce product #40	Node.js — File System nodejs coding-practice	—	30	Medium	Solve
1903	Reduce product #40	React — State react coding-practice	—	30	Medium	Solve
1904	Reduce product #40	JavaScript — Strings javascript coding-practice	—	30	Medium	Solve
1905	T-SQL INNER JOIN departments #40	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1906	matrix exercise #40	C# Programs — Matrix csharp coding-practice	—	40	Hard	Solve
1907	Container with most water #41	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1908	Join exercise #41	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1909	MongoDB aggregation #41	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1910	MySQL INNER JOIN dept names #41	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1911	PostgreSQL JOIN with alias #41	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1912	Sum 1..15 #41	React — State react coding-practice	—	40	Hard	Solve
1913	Sum 1..15 #41	Node.js — File System nodejs coding-practice	—	40	Hard	Solve
1914	Sum 1..15 #41	JavaScript — Strings javascript coding-practice	—	40	Hard	Solve
1915	T-SQL INNER JOIN departments #41	SQL Server — JOINs sqlserver coding-practice	—	40	Hard	Solve
1916	matrix exercise #41	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1917	Container with most water #42	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1918	Filter evens #42	JavaScript — Strings javascript coding-practice	—	30	Medium	Solve
1919	Filter evens #42	React — State react coding-practice	—	30	Medium	Solve
1920	Filter evens #42	Node.js — File System nodejs coding-practice	—	30	Medium	Solve
1921	Join exercise #42	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1922	MongoDB aggregation #42	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1923	MySQL INNER JOIN dept names #42	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1924	PostgreSQL JOIN with alias #42	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1925	T-SQL INNER JOIN departments #42	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1926	matrix exercise #42	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1927	Container with most water #43	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1928	Join exercise #43	SQL — JOINs sql coding-practice	—	40	Hard	Solve
1929	Map squares #43	JavaScript — Strings javascript coding-practice	—	20	Easy	Solve
1930	Map squares #43	React — State react coding-practice	—	20	Easy	Solve
1931	Map squares #43	Node.js — File System nodejs coding-practice	—	20	Easy	Solve
1932	MongoDB aggregation #43	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1933	MySQL INNER JOIN dept names #43	MySQL — JOINs mysql coding-practice	—	40	Hard	Solve
1934	PostgreSQL JOIN with alias #43	PostgreSQL — JOINs postgresql coding-practice	—	40	Hard	Solve
1935	T-SQL INNER JOIN departments #43	SQL Server — JOINs sqlserver coding-practice	—	20	Easy	Solve
1936	matrix exercise #43	C# Programs — Matrix csharp coding-practice	—	40	Hard	Solve
1937	Container with most water #44	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1938	Join exercise #44	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1939	Max in set #44	Node.js — File System nodejs coding-practice	—	30	Medium	Solve
1940	Max in set #44	JavaScript — Strings javascript coding-practice	—	30	Medium	Solve
1941	Max in set #44	React — State react coding-practice	—	30	Medium	Solve
1942	MongoDB aggregation #44	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1943	MySQL INNER JOIN dept names #44	MySQL — JOINs mysql coding-practice	—	30	Medium	Solve
1944	PostgreSQL JOIN with alias #44	PostgreSQL — JOINs postgresql coding-practice	—	30	Medium	Solve
1945	T-SQL INNER JOIN departments #44	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1946	matrix exercise #44	C# Programs — Matrix csharp coding-practice	—	30	Medium	Solve
1947	Container with most water #45	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1948	Join exercise #45	SQL — JOINs sql coding-practice	—	30	Medium	Solve
1949	MongoDB aggregation #45	MongoDB — Aggregation mongodb coding-practice	—	30	Medium	Solve
1950	MySQL INNER JOIN dept names #45	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