Message on Whatsapp 8879355057 for DSA(OA + Interview) + Fullstack Dev Training + 1-1 Personalized Mentoring to get 10+LPA Job
6 like 0 dislike

Author of this roadmap : Kumar K (

This roadmap is to be followed to prepare for coding-DSA rounds of top product based companies.


List of all OA :

in Tutorials-Roadmap by Expert (110,880 points)
edited by | 74,541 views

1 Answer

7 like 0 dislike
Best answer

About author of this RoadMap : Kumar K , hails from a tier4 college , was weak in academics but cracked MAANG after graduating from college , achieves all India Rank 10 on Hackerearth in DSA , 6 stars on Codechef and successfully mentored 150 students personally out of which 50 students got 10+LPA Packages and 10+ got 30+LPA packages . Most of his students belonged from service based companies or tierless colleges. 



Steps : 

0)Don't ever directly jump to DSA. Make sure you are good with basics and fundamentals of programming(loops && conditions) and good with at least one of these programming languages. (C++/Java/Python)

0.5)If you are java person do this -

If you are C++ person do this -


1)To do the above(further strengthening of fundamentals) , you may solve 30 - 40 problems from this list prepared by me from HackerRank :[status][]=unsolved&filters[skills][]=Problem%20Solving%20(Basic)&filters[difficulty][]=easy&filters[subdomains][]=warmup&filters[subdomains][]=implementation&filters[subdomains][]=strings&filters[subdomains][]=arrays-and-sorting&filters[subdomains][]=search&filters[subdomains][]=greedy&filters[subdomains][]=dynamic-programming&badge_type=problem-solving .

Before doing this list , make sure you do basics of either of one of these programming languages : (Java/C++/Python) and step 0.5 


1.2)If you are using C++ , learn STL from here : 

For Java , learn collections fro here :  


2)For each and every problem which you are trying to solve on HackerRank , LeetCode or GeeksforGeeks , solution is always there in editorial/tutorial section and make sure to read the discuss/comments section as many people have shared their approaches/solutions in them.

3)Whenever you learn some new algorithm or trick , learn to document it in a file/google doc/diary , it is important to go through this on a weekly basis so all ideas stay fresh in your mind.

4) While doing preparation on your DSA journey , go topic-wise which I have mentioned in this diagram :  


5)Do the topics in the order mentioned in the above diagram.

6)For each of these topics , do : i)Learn theory from good resources and videos. ii)First solve 20-30 popular and standard problems on the topic , then try 20-30 problems on the topic which are not standard or conventional . You may skip the later part if you are not aiming for the very top companies.

7)This is the secret formula to gain mastery over DSA. You can know about it in more depth here :

8)For all the topics above , Desi QnA team will be adding the best resources / videos and problems to practice very soon. Revision and contest tactics will be added soon too. :)

9)For now , the resources on first few topics are out :

i)Hashing :

ii)Two-Pointers :

iii)Sliding-Window :

iv)Linked List :

v)Binary Tree : 


Bonus : (Dynamic-Programming also available for folks who might want to have a look!!) :

10)My algorithms group on telegram : &&

11)My Jobs group on telegram :

All problems mentioned , try to submit them and test them on leetcode , as leetcode is the best platform and it also adds good weightage to resume when you have good amount of problems solved on leetcode



by Expert (110,880 points)
edited by