bulk-generated Coding Problems

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

6307 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
1901	T-SQL INNER JOIN departments #99	SQL Server — JOINs sqlserver coding-practice	—	20	Easy	Solve
1902	Container with most water #100	DSA — Two Pointers dsa coding-practice	—	30	Medium	Solve
1903	T-SQL INNER JOIN departments #100	SQL Server — JOINs sqlserver coding-practice	—	30	Medium	Solve
1904	Avg by category #1	SQL — Aggregates & GROUP BY sql coding-practice	—	40	Hard	Solve
1905	First duplicate in array #1	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
1906	MongoDB indexing #1	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
1907	MySQL AVG salary by dept #1	MySQL — Aggregates & GROUP BY mysql coding-practice	—	40	Hard	Solve
1908	PostgreSQL GROUP BY HAVING #1	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	40	Hard	Solve
1909	Sum 1..5 #1	Node.js — HTTP nodejs coding-practice	—	40	Hard	Solve
1910	Sum 1..5 #1	React — Hooks react coding-practice	—	40	Hard	Solve
1911	Sum 1..5 #1	JavaScript — Functions javascript coding-practice	—	40	Hard	Solve
1912	T-SQL AVG salary by department #1	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	40	Hard	Solve
1913	math exercise #1	C# Programs — Mathematical Functions csharp coding-practice	—	40	Hard	Solve
1914	Avg by category #2	SQL — Aggregates & GROUP BY sql coding-practice	—	30	Medium	Solve
1915	Filter evens #2	Node.js — HTTP nodejs coding-practice	—	30	Medium	Solve
1916	Filter evens #2	React — Hooks react coding-practice	—	30	Medium	Solve
1917	Filter evens #2	JavaScript — Functions javascript coding-practice	—	30	Medium	Solve
1918	First duplicate in array #2	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
1919	MongoDB indexing #2	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
1920	MySQL AVG salary by dept #2	MySQL — Aggregates & GROUP BY mysql coding-practice	—	30	Medium	Solve
1921	PostgreSQL GROUP BY HAVING #2	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	30	Medium	Solve
1922	T-SQL AVG salary by department #2	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
1923	math exercise #2	C# Programs — Mathematical Functions csharp coding-practice	—	30	Medium	Solve
1924	Avg by category #3	SQL — Aggregates & GROUP BY sql coding-practice	—	30	Medium	Solve
1925	First duplicate in array #3	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
1926	Map squares #3	Node.js — HTTP nodejs coding-practice	—	20	Easy	Solve
1927	Map squares #3	React — Hooks react coding-practice	—	20	Easy	Solve
1928	Map squares #3	JavaScript — Functions javascript coding-practice	—	20	Easy	Solve
1929	MongoDB indexing #3	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
1930	MySQL AVG salary by dept #3	MySQL — Aggregates & GROUP BY mysql coding-practice	—	30	Medium	Solve
1931	PostgreSQL GROUP BY HAVING #3	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	30	Medium	Solve
1932	T-SQL AVG salary by department #3	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	20	Easy	Solve
1933	math exercise #3	C# Programs — Mathematical Functions csharp coding-practice	—	30	Medium	Solve
1934	Avg by category #4	SQL — Aggregates & GROUP BY sql coding-practice	—	40	Hard	Solve
1935	First duplicate in array #4	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
1936	Max in set #4	Node.js — HTTP nodejs coding-practice	—	30	Medium	Solve
1937	Max in set #4	React — Hooks react coding-practice	—	30	Medium	Solve
1938	Max in set #4	JavaScript — Functions javascript coding-practice	—	30	Medium	Solve
1939	MongoDB indexing #4	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
1940	MySQL AVG salary by dept #4	MySQL — Aggregates & GROUP BY mysql coding-practice	—	40	Hard	Solve
1941	PostgreSQL GROUP BY HAVING #4	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	40	Hard	Solve
1942	T-SQL AVG salary by department #4	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
1943	math exercise #4	C# Programs — Mathematical Functions csharp coding-practice	—	40	Hard	Solve
1944	Avg by category #5	SQL — Aggregates & GROUP BY sql coding-practice	—	30	Medium	Solve
1945	First duplicate in array #5	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
1946	MongoDB indexing #5	MongoDB — Indexing mongodb coding-practice	—	30	Medium	Solve
1947	MySQL AVG salary by dept #5	MySQL — Aggregates & GROUP BY mysql coding-practice	—	30	Medium	Solve
1948	PostgreSQL GROUP BY HAVING #5	PostgreSQL — Aggregates & GROUP BY postgresql coding-practice	—	30	Medium	Solve
1949	Reduce product #5	React — Hooks react coding-practice	—	40	Hard	Solve
1950	Reduce product #5	Node.js — HTTP nodejs 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