Every week, I(Kumar K - FAANG SDE) receive hundreds of messages from students saying:
“I completed most of the questions from popular DSA sheets, but I am still failing in company OAs, interviews, LeetCode contests and Codeforces contests.”
This is happening because a lot of students believe one common myth:
Doing standard DSA sheets is enough to crack top tech company OAs and interviews.
But in the 2026 AI era, this is no longer fully true.
Popular sheets like Striver A2Z, TUF SDE Sheet and Love Babbar DSA Sheet are good for building a base. Striver’s A2Z sheet itself has hundreds of structured problems across topics, and Love Babbar’s sheet is also known for around 450 DSA problems.
But the problem is this:
Standard DSA Sheets Mostly Train SDSA, Not NSDSA
DSA preparation can be divided into two parts:
1. SDSA — Standard DSA
These are common patterns and popular questions already available in most DSA sheets.
Examples:
Two Sum
Merge Intervals
Detect Cycle
Standard DP
Basic Graph Traversal
Basic Bit Manipulation
2. NSDSA — Non-Standard DSA
These are unseen, tricky, mixed-concept, company-style problems.
These questions are usually not directly available in standard sheets.
For OAs, companies are now heavily asking NSDSA .
For interviews, many rounds start with a standard question, but then the interviewer adds a hard follow-up to test your actual problem-solving skill.
Why Standard DSA Sheets Alone Fail
When you solve only 30–40 questions from a topic, you usually learn only surface-level patterns.
For example, in Bit Manipulation, many sheets cover basic questions like:
Number of 1 bits
Power of 2
Count set bits
Unique number
Power set
Screenshot of Bit Manipulation Topic from a popular DSA Sheet
But Bit Manipulation has many deeper patterns:
Prefix XOR
Bitwise contribution
Dividing prefix into 20–30 bits
Prefix AND/OR concepts
XOR with subarrays
Bit DP style observations
These patterns frequently appear in OAs, interviews and contests, but are missing from many standard sheets.
The Real Placement Trend in 2026
For OAs:
Almost 100% focus is shifting towards NSDSA.
For interviews:
60–80% can become NSDSA through follow-ups, variations and mixed-topic questions.
This is why students who only memorize sheet solutions struggle when the question is slightly changed.
They know the solution to the original problem, but they don’t know how to think when the problem becomes new.
Why NSDSA Is Harder
NSDSA tests:
Real problem-solving
Pattern mixing
Mathematical observation
Greedy intuition
DP state design
Data structure creativity
Time pressure handling
Ability to solve unseen problems
The effort required for NSDSA is easily 5–10x more than SDSA.
This is the missing part in most students’ preparation.
Case Study: What Companies Are Asking Now
Many recent company experiences show this trend:
Standard question turning into hard follow-up
Codeforces-style questions in interviews
OA problems not available in any sheet
Segment Tree + Math mixed questions
Tree + Greedy + DP mixed problems
System design + DSA mixed interview questions
This is exactly why only completing a DSA sheet does not guarantee placement anymore.
Watch Full Explanation
I explained this complete concept in detail here:
VIDEO
Final Advice for Students
Do not stop at standard DSA sheets.
Use them only for building your base.
After that, move towards:
Company OA problems
LeetCode contest problems
Codeforces-style thinking
Mixed-topic problems
Follow-up based interview problems
NSDSA practice
In 2026:
Only SDSA makes you dependent on memorized patterns. NSDSA makes you strong, confident and interview-ready.
If your goal is to crack placements, internships, OAs and top tech interviews, then your preparation must go beyond TUF, Striver and Love Babbar sheets.
Solution :-
Start preparing NSDSA seriously here:
https://videsiqna.in
Join the community for free DSA + OA + CP weekend live training :
https://chat.whatsapp.com/GtsJ70d35fW4huk7ut4eYT?mode=gi_t