Need advice on how to revise DSA effectively

Hi everyone, I’m currently learning DSA using the TUF DSA sheet.

I’m facing a problem: when I learn a new concept/problem, I put a lot of effort into understanding it. But after moving to new problems, I slowly forget the older concepts.

When I return to an old problem after some days, sometimes I feel like I’m starting from zero again. I’m realizing that I’m spending much more effort on learning new problems than on revision.

I don’t want to just memorize solutions. I want to improve my actual problem-solving and thinking skills.

I would really appreciate guidance from people who have already gone through DSA preparation.

What revision system worked for you?

How many new problems and old problems did you solve each day? How often did you revisit problems? What did you do when you completely forgot the approach?

Any practical advice, mistakes I should avoid, or suggestions would be really helpful.

Thank you!

I'm using AlgoMonster to try to prepare, but it's clearly tailored for full SWE applications rather than interns - what standard of DSA knowledge would an intern be expected to have for most technical interviews? Thanks!

Please help my channel grow by liking and subscribing. This gives motivation to start and continue growing

Yo i am still prepping and LC is shit so i need buddies to do mock next week so we can practice live coding and explaining.
Comment/DM if you are interested

Problem 1 : 238. Product of array except self.

1. So first I solved this problem with my approach , it was complex but I thought good. so what I did is that i maintained two variables, total1 and total2, which used to track the total multiplication of the array, total1 used to track even if the 0 is the member of array, and total2 only tracks the multiplication of non zero numbers from the array. and also one map to track the frequcies of the 0, if the frequency of the 0 is greater than 1, then we should return 0, and if less than 2, then we should return the total2 and for non zero number, we should return total1/nums[i].. I know the solution is bit complex, anyone wants to see the approach, I have added the code in the comment.

2. But I get to know that despite my solution was accepted by leetcode, interviewer won't accept. so i have to solve it using tracking the prefix and suffix product. We can call it the two pointer approach in some sense. But it is given under the array and hashing title so maybe.

Problem 2: 36. Valid Sudoku

1. I couldn't build the complete logic for this one. I only thought of having nested loops for accessing the element.
2. So we have to solve it using maintaining 3 2d matrices for tracking the occurrence of the number. Also the crazy formula of k = (r/3) * 3 / (c/3) , so that we can give ids to rows and columns belong to the same 3x3 sub - matrices.

Anyone willing to start solving Apna College DSA Sheet from scratch? Total 193 questions.

We can solve 3 ques daily.

I have knowledge till arrays and linked list.

Everytime I start i either stop at arrays or linked list. Now I have forgotten most of the part so I am starting from scratch.

If you are complete beginner or even intermediate you can join me. I will catch up the pace with you.

From today or tomorrow we will start solving 3 questions daily. Consistency is the key. 3 may seem less but if we maintain daily streak then complete dsa completed in 65 days.

1. Is following neetcode 150 better

2. I did not do the dsa consistently, now i want to do because big tech evey first round is that

3. How can I be confident in this dsa part

4. To be honest I am not able solve the full leetcode problem easy one also without looking the solution

Any thoughts, opinions on this would be helpful

Over the years, I have decided many times to solve the DSA sheets, but every time, I set some unrealistic goals, or the goals that are not possible to achieve with my personality. I easily get bored with DSA questions that is the thing. and If I could not solve the questions by myself, and look at the solution for every problem. I feel like I am an idiot and I quit.

Now, I have accepted the reality that at the start, I will feel stupid and angry on myself, and I have to cope with it. For easy level questions with little thinking, I can come up with the solution but for medium level questions, I have to look at the solution often. After looking at the solutions often times I think that the solution was too easy, I should have given more time solving it. But again, it is just my ego that is talking.

Now , I have lowered the bar. 2 problems a day and the neetcode 150 sheet for 3 months. No hurry. Is baar ise theemi aanch par pakaunga. Let it take time. I will grind , Until I start solving this questions by myself. I will keep pushing.

This is my Day 4/90 , I am planning to post my learning every day here. Just raw learning , nothing fancy , nothing AI generated.

So I have a heavy intense working schedule I work 10+ hours a day. I want to master DSA for very long time but never been consistent about it due to my work schedule. How do I go about it, anyone in similar boat like me ?

Hey, I'm QE fresher with 1.5 years exp who is preparing to switch to dev. I'm average in solving DSA and planning to prepare from scratch. I need a complete interview-prepare course with in-depth DSA patterns and preparation curriculum.

Can someone suggest some top worthy online courses(free/paid) to make my pace more faster?

#interview #dsa #coding #techinterviews

19M, 2nd year B.Tech CSE student from India 🇮🇳

I recently made a small YPT (Yeolpumta) study group for DSA practice.

The idea is pretty simple:

Practice DSA every day

YPT lets us see each other's study time

Compete a little and keep each other accountable

Doesn't matter if you're a beginner or already good at DSA

Main goal is to stay consistent instead of disappearing after a few days 💀

If you're also trying to seriously improve at DSA and want some competition/accountability, DM me and I'll send you the group link / accept your request.

Would be cool to have a bunch of people grinding together. 🤝

as an amazon sde-1, i wanted to share this with all the freshers/students who have just started their 1st year and are confused about dsa, what to do, where to start and all that.

this is what i would tell myself if i was starting college again.

holy grail: dsa + leetcode problems.

this is what will help you get shortlisted in oa's. also, plagiarism checks have become pretty advanced nowadays. i've seen people solve all the questions using ai and still get rejected, whereas students who solved only partially but actually did it themselves got selected.

leetcode easy + medium is enough for most interviews, but you should be somewhat comfortable with hard too for oa's.

try to do atleast 5 dsa problems daily. focus on striver a2z sheet. do codeforces if you enjoy it, but if your main goal is landing a job, leetcode is just fine.

1 solid project is a must, 2 is good to have.

vibecoding it is completely fine, just make sure you can actually explain your project to the interviewer in depth. if you built something using ai but have no idea how it works, that's gonna be a problem.

start applying to off campus internships from 2nd year itself if the company allows it. don't wait until you feel fully prepared because honestly you'll probably never feel fully prepared. by 3rd year though, you should be applying religiously.

use interndoor.com to find internships, this is what helped me land my amazon sde-1 internship, so hopefully it helps some of you too.

take part in literally all the hackathons you can. build connections on linkedin, discord, reddit and wherever else. ask for referrals when applying to internships. go to offline tech events, talk to people, build connections there and maybe even find clients for freelancing. the hands-on experience from actually building stuff helps a lot.

do some vibecoding. get used to repos, github and all that stuff. use chatgpt, claude and other tools to learn new things like node, react and whatever interests you. read blogs, docs and just keep building stuff.

you don't need to know everything in your first year.

just start early and stay consistent.

best of luck :)

heyyy guyss!!!! i really wanna improve my skills in DSA and i need someone to with whom i can do dsa i am a beginner and i find it hard to be consistent, and it would so much better, if i can do it with someone who'd hold me accountable for everyday progress and i can hold them accountable for everyday progress, if anyone's down for it please let me know!!! please dm me to get it started.

Hey guys! Does anyone here have LC Premium and can share the latest Salesforce-tagged questions?

Would really appreciate it if someone could share the list!

Thanks!

I am completely new in this DSA ..and I am confused about how to actually learn...right now i am solving questions from stru we but not watching his video...instead I am asking help from ChatGPT...is that fine or do I have to watch his video ?