bulk-generated Coding Problems

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

6307 problems in this topic

#	Title	Topics	Acceptance	Pts	Difficulty
2501	First duplicate in array #93	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2502	T-SQL AVG salary by department #93	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	40	Hard	Solve
2503	First duplicate in array #94	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2504	T-SQL AVG salary by department #94	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
2505	First duplicate in array #95	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2506	T-SQL AVG salary by department #95	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	20	Easy	Solve
2507	First duplicate in array #96	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2508	T-SQL AVG salary by department #96	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
2509	First duplicate in array #97	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2510	T-SQL AVG salary by department #97	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	40	Hard	Solve
2511	First duplicate in array #98	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2512	T-SQL AVG salary by department #98	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
2513	First duplicate in array #99	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2514	T-SQL AVG salary by department #99	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	20	Easy	Solve
2515	First duplicate in array #100	DSA — Hashing dsa coding-practice	—	20	Easy	Solve
2516	T-SQL AVG salary by department #100	SQL Server — Aggregates & GROUP BY sqlserver coding-practice	—	30	Medium	Solve
2517	Above average #1	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
2518	MongoDB relationships #1	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2519	MySQL subquery above avg #1	MySQL — Subqueries mysql coding-practice	—	40	Hard	Solve
2520	PostgreSQL CTE top earners #1	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	40	Hard	Solve
2521	Reverse "code" #1	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2522	Sum 1..5 #1	JavaScript — Objects javascript coding-practice	—	40	Hard	Solve
2523	Sum 1..5 #1	React — useEffect react coding-practice	—	40	Hard	Solve
2524	Sum 1..5 #1	Node.js — Express patterns nodejs coding-practice	—	40	Hard	Solve
2525	T-SQL subquery above average #1	SQL Server — Subqueries sqlserver coding-practice	—	40	Hard	Solve
2526	Valid parentheses depth #1	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
2527	Above average #2	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2528	Count vowels in "practice" #2	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2529	Filter evens #2	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
2530	Filter evens #2	React — useEffect react coding-practice	—	30	Medium	Solve
2531	Filter evens #2	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve
2532	MongoDB relationships #2	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2533	MySQL subquery above avg #2	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2534	PostgreSQL CTE top earners #2	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2535	Queue — simulate task scheduler #2	DSA — Stacks & Queues dsa coding-practice	—	30	Medium	Solve
2536	T-SQL subquery above average #2	SQL Server — Subqueries sqlserver coding-practice	—	30	Medium	Solve
2537	Above average #3	SQL — Subqueries sql coding-practice	—	30	Medium	Solve
2538	Map squares #3	JavaScript — Objects javascript coding-practice	—	20	Easy	Solve
2539	Map squares #3	React — useEffect react coding-practice	—	20	Easy	Solve
2540	Map squares #3	Node.js — Express patterns nodejs coding-practice	—	20	Easy	Solve
2541	MongoDB relationships #3	MongoDB — Embedding vs referencing mongodb coding-practice	—	30	Medium	Solve
2542	MySQL subquery above avg #3	MySQL — Subqueries mysql coding-practice	—	30	Medium	Solve
2543	PostgreSQL CTE top earners #3	PostgreSQL — Subqueries & CTEs postgresql coding-practice	—	30	Medium	Solve
2544	T-SQL subquery above average #3	SQL Server — Subqueries sqlserver coding-practice	—	20	Easy	Solve
2545	Uppercase "interview" #3	C# Programs — Strings csharp coding-practice	—	20	Easy	Solve
2546	Valid parentheses depth #3	DSA — Stacks & Queues dsa coding-practice	—	20	Easy	Solve
2547	Above average #4	SQL — Subqueries sql coding-practice	—	40	Hard	Solve
2548	Max in set #4	JavaScript — Objects javascript coding-practice	—	30	Medium	Solve
2549	Max in set #4	React — useEffect react coding-practice	—	30	Medium	Solve
2550	Max in set #4	Node.js — Express patterns nodejs coding-practice	—	30	Medium	Solve

Problem of the day

Min Stack

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