basic Coding Problems

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

457 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
1	Hello World program	Basic JavaScript Programs javascript coding-practice	—	20	Easy	Solve
2	Hello World program	Basic C# Programs csharp coding-practice	25%	20	Easy	Solve
3	MySQL SELECT with LIMIT	SQL Server — SELECT basics sqlserver coding-practice	—	20	Easy	Solve
4	MySQL SELECT with LIMIT	MySQL — SELECT basics mysql coding-practice	—	20	Easy	Solve
5	PostgreSQL SELECT with ILIKE	PostgreSQL — SELECT basics postgresql coding-practice	—	20	Easy	Solve
6	Read environment variable with default	Basic Node.js Programs nodejs coding-practice	—	20	Easy	Solve
7	Select all employees	SQL — SELECT basics sql coding-practice	—	20	Easy	Solve
8	Select specific columns	SQL — SELECT basics sql coding-practice	—	20	Easy	Solve
9	Swap two numbers without third variable	Basic JavaScript Programs javascript coding-practice	—	20	Easy	Solve
10	Swap two numbers without third variable	Basic C# Programs csharp coding-practice	—	20	Easy	Solve
11	Check even or odd	Basic C# Programs csharp coding-practice	—	20	Easy	Solve
12	Check even or odd	Basic JavaScript Programs javascript coding-practice	—	20	Easy	Solve
13	Factorial of a number	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
14	Sum of array elements	Basic JavaScript Programs javascript coding-practice	—	20	Easy	Solve
15	Fibonacci series (first 10 terms)	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
16	Find maximum in array	Basic JavaScript Programs javascript coding-practice	—	20	Easy	Solve
17	Prime number check	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
18	MySQL SELECT top earners #1	MySQL — SELECT basics mysql coding-practice	—	40	Hard	Solve
19	PostgreSQL SELECT with LIMIT #1	PostgreSQL — SELECT basics postgresql coding-practice	—	40	Hard	Solve
20	Print numbers 1 to 5	Basic C# Programs csharp coding-practice	—	20	Easy	Solve
21	Select price > 100 #1	SQL — SELECT basics sql coding-practice	—	40	Hard	Solve
22	Sum 1..5 #1	Basic JavaScript Programs javascript coding-practice	—	40	Hard	Solve
23	Sum 1..5 #1	Basic Node.js Programs nodejs coding-practice	—	40	Hard	Solve
24	T-SQL SELECT TOP 3 by salary #1	SQL Server — SELECT basics sqlserver coding-practice	—	40	Hard	Solve
25	Filter evens #2	Basic Node.js Programs nodejs coding-practice	—	30	Medium	Solve
26	Filter evens #2	Basic JavaScript Programs javascript coding-practice	—	30	Medium	Solve
27	MySQL SELECT top earners #2	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
28	PostgreSQL SELECT with LIMIT #2	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
29	Select price > 110 #2	SQL — SELECT basics sql coding-practice	—	30	Medium	Solve
30	Sum of first 6 natural numbers	Basic C# Programs csharp coding-practice	—	20	Easy	Solve
31	T-SQL SELECT TOP 4 by salary #2	SQL Server — SELECT basics sqlserver coding-practice	—	30	Medium	Solve
32	Factorial of 7	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
33	Map squares #3	Basic JavaScript Programs javascript coding-practice	—	20	Easy	Solve
34	Map squares #3	Basic Node.js Programs nodejs coding-practice	—	20	Easy	Solve
35	MySQL SELECT top earners #3	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
36	PostgreSQL SELECT with LIMIT #3	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
37	Select price > 120 #3	SQL — SELECT basics sql coding-practice	—	30	Medium	Solve
38	T-SQL SELECT TOP 5 by salary #3	SQL Server — SELECT basics sqlserver coding-practice	—	20	Easy	Solve
39	Check if 7 is prime	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
40	Max in set #4	Basic JavaScript Programs javascript coding-practice	—	30	Medium	Solve
41	Max in set #4	Basic Node.js Programs nodejs coding-practice	—	30	Medium	Solve
42	MySQL SELECT top earners #4	MySQL — SELECT basics mysql coding-practice	—	40	Hard	Solve
43	PostgreSQL SELECT with LIMIT #4	PostgreSQL — SELECT basics postgresql coding-practice	—	40	Hard	Solve
44	Select price > 130 #4	SQL — SELECT basics sql coding-practice	—	40	Hard	Solve
45	T-SQL SELECT TOP 6 by salary #4	SQL Server — SELECT basics sqlserver coding-practice	—	30	Medium	Solve
46	First 9 Fibonacci numbers	Basic C# Programs csharp coding-practice	—	30	Medium	Solve
47	MySQL SELECT top earners #5	MySQL — SELECT basics mysql coding-practice	—	30	Medium	Solve
48	PostgreSQL SELECT with LIMIT #5	PostgreSQL — SELECT basics postgresql coding-practice	—	30	Medium	Solve
49	Reduce product #5	Basic JavaScript Programs javascript coding-practice	—	40	Hard	Solve
50	Reduce product #5	Basic Node.js Programs nodejs coding-practice	—	40	Hard	Solve

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Graph Valid Tree

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