Top 40 commonly asked DSA questions :

𝗔𝗿𝗿𝗮𝘆𝘀 𝗮𝗻𝗱 𝗦𝘁𝗿𝗶𝗻𝗴𝘀:
1. Find the missing number in an array of integers.
2. Implement an algorithm to rotate an array.
3. Check if a string is a palindrome.
4. Find the first non-repeating character in a string.
5. Implement an algorithm to reverse a linked list.
6. Merge two sorted arrays.
7. Implement a stack using arrays/linked list.
8. Write a program to remove duplicates from a sorted array.

𝗟𝗶𝗻𝗸𝗲𝗱 𝗟𝗶𝘀𝘁𝘀:
1. Detect a cycle in a linked list.
2. Find the intersection point of two linked lists.
3. Reverse a linked list in groups of k.
4. Implement a function to add two numbers represented by linked lists.
5. Clone a linked list with next and random pointer.

𝗧𝗿𝗲𝗲𝘀 𝗮𝗻𝗱 𝗕𝗶𝗻𝗮𝗿𝘆 𝗦𝗲𝗮𝗿𝗰𝗵 𝗧𝗿𝗲𝗲𝘀 (𝗕𝗦𝗧):
1. Find the height of a binary tree.
2. Check if a binary tree is balanced.
3. Find the lowest common ancestor in a binary tree.
4. Serialize and deserialize a binary tree.
5. Implement an algorithm for in-order traversal without recursion.
6. Convert a BST to a sorted doubly linked list.

You can check these amazing resources for DSA Preparation

All the best 👍👍

How does HTTP works?

Anyone else remember when the search bar and the address bar were two different things??

Prepare for GATE: The Right Time is NOW!

GeeksforGeeks brings you everything you need to crack GATE 2026 – 900+ live hours, 300+ recorded sessions, and expert mentorship to keep you on track.

What’s inside?

✔ Live & recorded classes with India’s top educators
✔ 200+ mock tests to track your progress
✔ Study materials - PYQs, workbooks, formula book & more
✔ 1:1 mentorship & AI doubt resolution for instant support
✔ Interview prep for IITs & PSUs to help you land opportunities

Learn from Experts Like:

Satish Kumar Yadav – Trained 20K+ students
Dr. Khaleel – Ph.D. in CS, 29+ years of experience
Chandan Jha – Ex-ISRO, AIR 23 in GATE
Vijay Kumar Agarwal – M.Tech (NIT), 13+ years of experience
Sakshi Singhal – IIT Roorkee, AIR 56 CSIR-NET
Shailendra Singh – GATE 99.24 percentile
Devasane Mallesham – IIT Bombay, 13+ years of experience

Use code UPSKILL30 to get an extra 30% OFF (Limited time only)

📌 Enroll for a free counseling session now: https://gfgcdn.com/tu/UI2/

𝗠𝗮𝘀𝘁𝗲𝗿 𝗦𝗼𝗳𝘁 𝗦𝗸𝗶𝗹𝗹𝘀 𝗳𝗼𝗿 𝗖𝗮𝗿𝗲𝗲𝗿 𝗦𝘂𝗰𝗰𝗲𝘀𝘀!😍

Want to stand out in your career?

Soft skills are just as important as technical expertise! 🌟

Here are 3 FREE courses to help you communicate, negotiate, and present with confidence

𝐋𝐢𝐧𝐤👇:-

https://pdlink.in/41V1Yqi

Tag someone who needs this boost! 🚀

10 AI tools that can save you hours:

1. http://Durable.co → AI website builder

2. http://Consensus.app → AI academic research

3. http://Rytr.me → Personal AI copywriter

4. http://Bardeen.ai → Automating tasks with AI

5. http://Taskade.com → Brain powered by AI

6. http://Quillbot.com → Reformulate your texts

7. http://Leonardo.ai → Generate realistic photos

8. http://Otter.ai → AI takes notes for you

9. http://Boomy.com → Create music in seconds

10. http://Clipdrop.co → Personal AI copywriter

Try them, they’re awesome!

𝗗𝗮𝘁𝗮 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 𝗙𝗥𝗘𝗘 𝗢𝗻𝗹𝗶𝗻𝗲 𝗠𝗮𝘀𝘁𝗲𝗿𝗰𝗹𝗮𝘀𝘀 😍 

Know The Roadmap To a Successful Data Science Career 

- A Guide to Career in Data Science : Tools, Skills and Career Fundamentals.

- Jumpstart Your Data Science Career with Essential Tools and Skills

Eligibility :- Students,Freshers & Woking Professionals 

𝐑𝐞𝐠𝐢𝐬𝐭𝐞𝐫 𝐅𝐨𝐫 𝐅𝐑𝐄𝐄 👇:-

https://pdlink.in/41GuGex

(Limited Slots ..HurryUp🏃‍♂️ ) 

𝐃𝐚𝐭𝐞 & 𝐓𝐢𝐦𝐞:-  22nd March, 2025, at 7 PM

🍓 Python Certifications to boost your resume in 2023 🍓

𝟭. 𝗜𝗻𝘁𝗿𝗼 𝘁𝗼 𝗣𝘆𝘁𝗵𝗼𝗻
This a great course to get started with learning Python, if you have no coding experience.
👉 https://kaggle.com/learn/intro-to-programming

𝟮. 𝗣𝘆𝘁𝗵𝗼𝗻 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗰𝗼𝘂𝗿𝘀𝗲
Learn the fundamentals like functions, loops, conditional statements, etc of the most important language for data science.
👉 https://kaggle.com/learn/python

𝟯. 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗘𝘀𝘀𝗲𝗻𝘁𝗶𝗮𝗹𝘀 𝗶𝗻 𝗣𝘆𝘁𝗵𝗼𝗻
Part 1 prepares you for PCEP – Certified Entry-Level Python Programmer Certification.
Part 2 prepares you for PCAP – Certified Associate in Python Programming Certification.
👉 https://netacad.com/courses/programming/pcap-programming-essentials-python

𝟰. Python Data Structure and Algorithms
👉 https://news.1rj.ru/str/programming_guide/76

𝟱. 𝗦𝗰𝗶𝗲𝗻𝘁𝗶𝗳𝗶𝗰 𝗖𝗼𝗺𝗽𝘂𝘁𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗣𝘆𝘁𝗵𝗼𝗻
You'll learn Python fundamentals like variables, loops, conditionals, and functions.
Then you'll quickly ramp up to complex data structures, networking, relational databases, and data visualization.
👉 https://freecodecamp.org/learn/scientific-computing-with-python/

𝗣𝗼𝘄𝗲𝗿𝗕𝗜 𝗧𝗼𝗽 𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 😍

Here are two FREE Power BI courses that will teach you everything you need to know!

1️⃣ Microsoft Learn: Power BI Training
2️⃣ Simplilearn: Power BI for Beginners

𝐋𝐢𝐧𝐤 👇:-

https://pdlink.in/4hptC4z

Enroll For FREE & Get Certified 🎓

Devops learning plan for beginners

𝗜𝗕𝗠 𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 😍

Top Free Courses You Can Take Today

1️⃣ Data Science Fundamentals
2️⃣ AI & Machine Learning
3️⃣ Python for Data Science
4️⃣ Cloud Computing & Big Data

𝐋𝐢𝐧𝐤 👇:-

https://pdlink.in/41Hy2hp

Enroll For FREE & Get Certified 🎓

🔰 Bash Scripting Basics

𝗠𝗮𝘀𝘁𝗲𝗿 𝗦𝗤𝗟 𝗳𝗼𝗿 𝗙𝗥𝗘𝗘 𝘄𝗶𝘁𝗵 𝗧𝗵𝗲𝘀𝗲 𝟱 𝗣𝗼𝘄𝗲𝗿𝗳𝘂𝗹 𝗪𝗲𝗯𝘀𝗶𝘁𝗲𝘀!😍

Want to boost your data skills without spending a dime?

These FREE SQL courses will take you from beginner to expert, whether you’re an aspiring Data Analyst, Data Scientist, or Backend Developer!📊

𝐋𝐢𝐧𝐤👇:-

https://pdlink.in/4l2q2Ay

Start Learning Today ✅️

Introduction to Algorithms
by MIT, Spring 2020

Instructor(s) 👨‍🏫

Prof. Erik Demaine
Dr. Jason Ku
Prof. Justin Solomon

🎬 21 lecture video lessons
🎬 3 quiz video lessons (4+ hours)
🎬 8 problem video sessions (12 hours)


⏰ 40 hours of video

🔗 Course home
🔗 Lecture videos
🔗 Resources

#dsa #algorithms #datastructures

In my teen's I thought:

• A fancy job noscript.
• A huge salary.
• A demanding job.
= WINNING

In my 20s I realized:

• Having control of your time.
• Doing work you enjoy.
• Seeing family more happy.
= WINNING

Life Looks Different Every Decade.

Hey guys,

Here are some best Telegram Channels for free education in 2025
👇👇

Free Courses with Certificate

Web Development Free Resources

Data Science & Machine Learning

Programming Free Books

Python Free Courses

Ethical Hacking & Cyber Security

English Speaking & Communication

Stock Marketing & Investment Banking

Coding Projects

Jobs & Internship Opportunities

Crack your coding Interviews

Udemy Free Courses with Certificate

ChatGPT Prompts

AI Projects

Free access to all the Paid Channels
👇👇
https://news.1rj.ru/str/addlist/4q2PYC0pH_VjZDk5

Do react with ♥️ if you need more content like this

ENJOY LEARNING 👍👍

𝟱 𝗙𝗿𝗲𝗲 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝘁𝗼 𝗞𝗶𝗰𝗸𝘀𝘁𝗮𝗿𝘁 𝗬𝗼𝘂𝗿 𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 𝗖𝗮𝗿𝗲𝗲𝗿 𝗶𝗻 𝟮𝟬𝟮𝟱😍

Looking to break into data analytics but don’t know where to start?👋

🚀 The demand for data professionals is skyrocketing in 2025, & 𝘆𝗼𝘂 𝗱𝗼𝗻’𝘁 𝗻𝗲𝗲𝗱 𝗮 𝗱𝗲𝗴𝗿𝗲𝗲 𝘁𝗼 𝗴𝗲𝘁 𝘀𝘁𝗮𝗿𝘁𝗲𝗱!🚨

𝐋𝐢𝐧𝐤👇:-

https://pdlink.in/4kLxe3N

🔗 Start now and transform your career for FREE!

Here we have compiled a list of 40+ cheat sheets that cover a wide range of topics essential for you. 👇

1. HTML & CSS :- htmlcheatsheet.com
2. JavaScript :- https://lnkd.in/dfSvFuhM
3. Jquery :- https://lnkd.in/dcvy6kmQ
4. Bootstrap 5 :- https://lnkd.in/dNZ6qdBh
5. Tailwind CSS :- https://lnkd.in/d_T5q5Tx
6. React :- https://news.1rj.ru/str/Programming_experts/230
7. Python :- https://news.1rj.ru/str/pythondevelopersindia/99
8. MongoDB :- https://lnkd.in/dBXxCQ43
9. SQL :- https://news.1rj.ru/str/sqlspecialist/222
10. Nodejs :- https://lnkd.in/dwry8BKH
11. Expressjs :- https://lnkd.in/d3BMMwem
12. Django :- https://lnkd.in/dYWQKZnT
13. PHP :- https://quickref.me/php
14. Google Dork :- https://lnkd.in/dKej3-42
15. Linux :- https://lnkd.in/dCgH_qUq
16. Git :- https://lnkd.in/djf9Wc98
17. VSCode :- https://quickref.me/vscode
18. PC Keyboard :- http://bit.ly/3luF73K
19. Data Structures and Algorithms :- https://lnkd.in/d75ijyr3
20. DSA Practice :- https://lnkd.in/dDc6SaR8
21. Data Science :- https://lnkd.in/dHaxPYYA
22. Flask :- https://lnkd.in/dkUyWHqR
23. CCNA :- https://lnkd.in/dE_yD6ny
24. Cloud Computing :- https://lnkd.in/d9vggegr
25. Machine Learning :- https://news.1rj.ru/str/learndataanalysis/29
26. Windows Command :- https://lnkd.in/dAMeCywP
27. Computer Basics :- https://lnkd.in/d9yaNaWN
28. MySQL :- https://lnkd.in/d7iJjSpQ
29. PostgreSQL :- https://lnkd.in/dDHQkk5f
30. MSExcel :- https://bit.ly/3Jz0dpG
31. MSWord :- https://lnkd.in/dAX4FGkR
32. Java :- https://lnkd.in/dRe98iSB
33. Cryptography :- https://lnkd.in/dYvRHAH9
34. C++ :- https://lnkd.in/d4GjE2kd
35. C :- https://lnkd.in/diuHU72d
36. Resume Creation :- https://bit.ly/3JA3KnJ
37. ChatGPT :- https://lnkd.in/dsK37bSj
38. Docker :- https://lnkd.in/dNVJxYNa
39. Gmail :- bit.ly/3JX68pR
40. AngularJS :- bit.ly/3yYY0ik
41. Atom Text Editor :- bit.ly/40oJFY9
42. R Programming :- bit.ly/3Jysq00

𝐁𝐞𝐜𝐨𝐦𝐞 𝐀 𝐃𝐚𝐭𝐚 𝐀𝐧𝐚𝐥𝐲𝐬𝐭 𝐈𝐧 𝐓𝐨𝐩 𝐌𝐍𝐂𝐬 😍 

Learn Data Analytics, Data Science & AI

Curriculum designed and taught by Alumni from IITs

Learn by doing, build Industry level projects

𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐞𝐬:- 

🙌100% Job Assistance
🎓450+ Partner Companies
💻50+ Practice Interviews

𝐁𝐨𝐨𝐤 𝐚 𝟏:𝟏 𝐅𝐑𝐄𝐄 𝐂𝐨𝐮𝐧𝐬𝐞𝐥𝐢𝐧𝐠 𝐒𝐞𝐬𝐬𝐢𝐨𝐧 👇:-

https://bit.ly/4g3kyT6

( Limited Slots )

𝗬𝗼𝘂𝗿 𝗥𝗼𝗮𝗱𝗺𝗮𝗽 𝘁𝗼 𝗕𝗲𝗰𝗼𝗺𝗶𝗻𝗴 𝗮𝗻 𝗔𝗜 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 𝗶𝗻 𝟮𝟬𝟮𝟱!😍

Want to break into Artificial Intelligence and work with cutting-edge technologies?👋

This FREE roadmap will guide you through everything you need to become an AI Engineer in 2025!🎊

𝐋𝐢𝐧𝐤👇:-

https://pdlink.in/4iA6aTE

Build Real-World AI Projects & stand out from the crowd!✅️