Preparing for Internships: A Comprehensive Guide

Summary

This guide covers the essential resources and strategies to prepare for internships, focusing on topics that are most likely to be assessed during the application process. Below, you’ll find a categorized list of resources, along with links and descriptions to help you navigate your preparation journey effectively.

Requirements by Companies

Before diving into preparation, it’s essential to understand the expectations and requirements set by companies. This includes the level of proficiency required, the competition you might face, and the time needed to complete different stages of the application process.

• Level to Prepare To: Companies typically expect strong problem-solving skills, knowledge of data structures and algorithms, and proficiency in system design. Some might also test your understanding of computer science fundamentals.
• Competition: Expect stiff competition, especially from peers who have been rigorously preparing through platforms like LeetCode and Codeforces.
• Time to Complete Stages: Depending on the company, the application process might involve multiple stages, including online assessments, technical interviews, and system design interviews. Allocating 3-6 months for thorough preparation is advisable.

Things to Prepare

Data Structures & Algorithms (DSA)

This is critical for getting through online assessments (OAs) and technical rounds. Here are some top resources to master DSA:

Lists and References

• Striver’s List: Striver’s A2Z DSA Course/Sheet - A comprehensive guide to crack any FAANG or PBCs.
• Neetcode 150: Practice - A curated list of 150 essential LeetCode problems.
• Grind 75: Grind 75 - A better Blind 75, customizable by the author of Blind 75.

Video Solutions

• Take U Forward: YouTube
• Neetcode: My Brain after 569 Leetcode Problems

Competitive Programming (CP)

While not always mandatory, being prepared for Codeforces-level questions can give you an edge during placements.

References

• CP Handbook: CSES
• Algorithms for Competitive Programming: cp-algorithms.com
• USACO Guide: USACO Guide

Lists

• CSES Problem-Set: CSES Problem Set
• AOJ Ladders
• Junior Training Sheet V7.0: Google Sheets

Projects

Building projects can help you stand out during technical rounds. Here’s a priority order for the type of projects you should consider:

General Sources

• Developer Roadmaps: roadmap.sh
• System Design Primer: GitHub
• Build Your Own X: GitHub

Web Development

• Concepts to Cover: HTML, CSS, JavaScript, Frontend Frameworks, Backend Frameworks
• References: MDN
• Courses: Udemy, The Odin Project, Full Stack Open

App Development

Focus on building cross-platform applications using frameworks like Flutter or React Native.

AI / ML

Although not always part of the job description, knowledge in AI/ML can be a significant plus.

Concepts to Cover

• Machine Learning: From Logistic Regression to Ensemble Learning
• Deep Learning: Backpropagation, ANNs, CNNs, DNNs, Transformers, Autoencoders, GANs, Recommender Systems

References

• The Deep Learning Book: MIT Press
• Dive into Deep Learning: d2l.ai

Courses

• Kaggle Tutorials: Kaggle

Low-Level Design (LLD) / CS Theory

Understanding low-level design and computer science theory is crucial for technical rounds.

General Resources

• GeeksforGeeks (GFG): GFG
• System Design Primer: GitHub

OOPS (Object-Oriented Programming)

• References/Courses:
  • GFG
  • InterviewBit
  • OOP in Java Course - YouTube
• Practice:
  • GFG Gate Questions
  • InterviewBit

Database Management Systems (DBMS)

Understanding DBMS concepts is crucial for system design interviews.

References/Courses

• GFG: GFG DBMS
• InterviewBit: InterviewBit DBMS
• CMU Intro to Database Systems: YouTube

Practice

• GFG Gate Questions: GFG
• InterviewBit: InterviewBit

Operating Systems (OS)

Knowledge of operating systems is tested in many technical interviews.

References/Courses

• GFG: GFG OS
• InterviewBit: InterviewBit OS
• CS 162: Operating Systems and Systems Programming - Berkeley: YouTube

Practice

• GFG Gate Questions: GFG
• InterviewBit: InterviewBit

Networking

Networking knowledge is essential for understanding distributed systems and web applications.

References/Courses

• High Performance Browser Networking: O’Reilly

Aptitude

Aptitude tests are common in the initial stages of the hiring process.

References/Courses

• IndiaBIX: Aptitude Questions and Answers
• CAT/GMAT/GRE Resources