Major Topics

1. Data Structures and Algorithms

• Must Do Problems on Topic Wise (GFG)
• Must Do Problems on Topic Wise (Practice) (GFG)
• Complete DSA Roadmap (InterviewBit)
• Abdul Bari Standard DSA Playlist (YT)
• Leetcode Problems

2. Programming Language

OOPs

• Commonly Asked Questions 1 (GFG)
• Quiz (GFG)
• How to draw Class Diagrams (YT)

C++

• Commonly Asked Questions 1 (GFG)
• Commonly Asked Questions 2 (GFG)
• Quiz (GFG)

Java

• Commonly Asked Questions 1 (GFG)
• Commonly Asked Questions 2 (GFG)
• Quiz (GFG)

3. Database Management Systems

• Most Important DBMS Questions + Video Crash Course (InterviewBit)
• SQL Syntax Ref
• Commonly Asked Questions 1 (GFG)
• Commonly Asked Questions 2 (GFG)
• SQL Problems (Leetcode)
• How to draw ER Diagram (YT)
• Sanchit Jain Complete Playlist (YT)

4. Operating Systems

• Commonly Asked Questions 1 (GFG)
• Sanchit Jain Complete Playlist (YT)
• Quiz (GFG)

5. System Design

• Usually not asked during Internship Interviews
• Gaurav Sen Complete Playlist (YT)
• Online courses like SystemsExpert and Grokking System Design are good

6. Competitive Programming

• Required for companies like Codenation, Media.net, Google, Tower research
• Codeforces
• AtCoder
• Codechef
• SecondThread (YT)
• Errichto (YT)
• Gaurav Sen (YT)
• William Lin (YT)
• Codechef (YT)
• SPOJ
• CSES Problem Set