basic Coding Problems

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

457 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
151	Count evens from 1 to 24	Basic C# Programs csharp coding-practice	—	20	Easy	Solve
152	MySQL SELECT top earners #20	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
153	PostgreSQL SELECT with LIMIT #20	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
154	Reduce product #20	Basic JavaScript Programs javascript coding-practice	—	30	Medium	Solve
155	Reduce product #20	Basic Node.js Programs nodejs coding-practice	—	30	Medium	Solve
156	Select price > 290 #20	SQL — SELECT basics sql coding-practice	—	30	Medium	Solve
157	T-SQL SELECT TOP 7 by salary #20	SQL Server — SELECT basics sqlserver coding-practice	—	30	Medium	Solve
158	GCD of 5 and 12	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
159	MySQL SELECT top earners #21	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
160	PostgreSQL SELECT with LIMIT #21	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
161	Select price > 300 #21	SQL — SELECT basics sql coding-practice	—	30	Medium	Solve
162	Sum 1..10 #21	Basic JavaScript Programs javascript coding-practice	—	40	Hard	Solve
163	Sum 1..10 #21	Basic Node.js Programs nodejs coding-practice	—	40	Hard	Solve
164	T-SQL SELECT TOP 3 by salary #21	SQL Server — SELECT basics sqlserver coding-practice	—	40	Hard	Solve
165	Filter evens #22	Basic Node.js Programs nodejs coding-practice	—	30	Medium	Solve
166	Filter evens #22	Basic JavaScript Programs javascript coding-practice	—	30	Medium	Solve
167	MySQL SELECT top earners #22	MySQL — SELECT basics mysql coding-practice	—	40	Hard	Solve
168	PostgreSQL SELECT with LIMIT #22	PostgreSQL — SELECT basics postgresql coding-practice	—	40	Hard	Solve
169	Print numbers 1 to 6	Basic C# Programs csharp coding-practice	—	20	Easy	Solve
170	Select price > 310 #22	SQL — SELECT basics sql coding-practice	—	40	Hard	Solve
171	T-SQL SELECT TOP 4 by salary #22	SQL Server — SELECT basics sqlserver coding-practice	—	30	Medium	Solve
172	Map squares #23	Basic Node.js Programs nodejs coding-practice	—	20	Easy	Solve
173	Map squares #23	Basic JavaScript Programs javascript coding-practice	—	20	Easy	Solve
174	MySQL SELECT top earners #23	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
175	PostgreSQL SELECT with LIMIT #23	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
176	Select price > 320 #23	SQL — SELECT basics sql coding-practice	—	30	Medium	Solve
177	Sum of first 7 natural numbers	Basic C# Programs csharp coding-practice	—	20	Easy	Solve
178	T-SQL SELECT TOP 5 by salary #23	SQL Server — SELECT basics sqlserver coding-practice	—	20	Easy	Solve
179	Factorial of 8	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
180	Max in set #24	Basic Node.js Programs nodejs coding-practice	—	30	Medium	Solve
181	Max in set #24	Basic JavaScript Programs javascript coding-practice	—	30	Medium	Solve
182	MySQL SELECT top earners #24	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
183	PostgreSQL SELECT with LIMIT #24	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
184	Select price > 330 #24	SQL — SELECT basics sql coding-practice	—	30	Medium	Solve
185	T-SQL SELECT TOP 6 by salary #24	SQL Server — SELECT basics sqlserver coding-practice	—	30	Medium	Solve
186	Check if 11 is prime	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
187	MySQL SELECT top earners #25	MySQL — SELECT basics mysql coding-practice	—	40	Hard	Solve
188	PostgreSQL SELECT with LIMIT #25	PostgreSQL — SELECT basics postgresql coding-practice	—	40	Hard	Solve
189	Reduce product #25	Basic Node.js Programs nodejs coding-practice	—	40	Hard	Solve
190	Reduce product #25	Basic JavaScript Programs javascript coding-practice	—	40	Hard	Solve
191	Select price > 340 #25	SQL — SELECT basics sql coding-practice	—	40	Hard	Solve
192	T-SQL SELECT TOP 7 by salary #25	SQL Server — SELECT basics sqlserver coding-practice	—	40	Hard	Solve
193	First 6 Fibonacci numbers	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
194	MySQL SELECT top earners #26	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
195	PostgreSQL SELECT with LIMIT #26	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
196	Select price > 350 #26	SQL — SELECT basics sql coding-practice	—	30	Medium	Solve
197	Sum 1..15 #26	Basic Node.js Programs nodejs coding-practice	—	30	Medium	Solve
198	Sum 1..15 #26	Basic JavaScript Programs javascript coding-practice	—	30	Medium	Solve
199	T-SQL SELECT TOP 3 by salary #26	SQL Server — SELECT basics sqlserver coding-practice	—	30	Medium	Solve
200	Count evens from 1 to 11	Basic C# Programs csharp coding-practice	—	20	Easy	Solve

Problem of the day

Minimum Interval to Include Each Query

Hard · +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