Last Updated: 31 Jan, 2026
Ninjas SDE Sheet
Ninjas SDE Sheet is your gateway to acing SDE interviews! Packed with essential coding challenges frequently encountered in top-tier company interviews, this sheet is your trusty companion for major placement preparations. Discover a curated collection of problems that have helped many aspirants secure their ideal roles. Dive into the SDE Sheet, conquer the DSA challenges, and prepare to shine in interviews with leading MNCs. Best wishes for your coding adventures!
Difficulty
Companies
Sort by
Hot topics
Arrays
Backtracking
Binary Search
Binary Search Trees
Binary Trees
Bit Manipulation
Breadth-first Search
Depth-first Search
Divide and Conquer
Dynamic Programming
Fundamentals
Graph
Greedy
Hash Table
Heap
Categories
Problem Title
Exp
Difficulty
Avg. time
Attempted
Upvotes
40
Easy
15 mins
8.4k
415
40
Easy
10 mins
40k
115
40
Easy
10 mins
0k
16
40
Easy
20 mins
0k
33
40
Easy
14 mins
107.2k
256
40
Easy
12 mins
47.8k
352
40
Easy
20 mins
305.9k
1 k
40
Easy
30 mins
0k
22
40
Easy
10 mins
19.7k
143
40
Easy
15 mins
406.7k
985
40
Easy
15 mins
70k
219
40
Easy
6 mins
0k
20
40
Easy
25 mins
0k
20
40
Easy
10 mins
84.1k
451
40
Easy
14 mins
2k
94
40
Easy
20 mins
123.4k
331
40
Easy
15 mins
74.5k
230
40
Easy
23 mins
32.4k
134
40
Easy
15 mins
30.2k
104
40
Easy
15 mins
22.1k
67
40
Easy
10 mins
9.7k
47
40
Easy
10 mins
34.9k
206
40
Easy
17 mins
0k
5
40
Easy
15 mins
0k
10
40
Easy
21 mins
0k
0
1
2
3
4
Frequently Asked Questions
What is the SDE Problem Sheet?
The SDE Problem Sheet is a curated collection of algorithmic problems aimed at helping software developers refresh and enhance their Data Structures and Algorithms (DSA) skills. It covers a range of difficulties, starting from basic problems in the easy sheet to more complex algorithms as one grinds towards the ninja sheet.
Who is the target audience for this Problem Sheet?
The Problem Sheet is designed for software developers who want to revisit and strengthen their DSA skills. It caters to individuals looking to reacquaint themselves with essential concepts and tackle problems of varying difficulty levels.
What topics does the Problem Sheet cover?
The Problem Sheet comprehensively covers essential DSA topics such as arrays, linked lists, stacks, queues, trees, heaps, hash tables, and graphs. It progresses through lower-difficulty problems for foundational understanding and advances to higher difficulty levels, incorporating complex algorithms like dynamic programming and advanced graph algorithms.
How can I use the SDE Problem Sheet effectively?
Start by solving problems based on your current skill level. Gradually progress to more challenging problems as you gain confidence. Focus on understanding the underlying concepts, time and space complexities, and optimal solutions.
Are solutions provided for the problems?
Yes, all problems have a provided solution. It's beneficial to attempt solving the problems on your own first and then refer to the solutions to compare and learn.