- Hackerrank
- Leetcode
- CodeChef
- Codeforces
- Hackerearth
- Codewars
- freeCodeCamp
- AtCoder
- Spoj
- CodeStudio by Coding Ninjas
GeeksForGeeks - Best place to find detailed notes on theoretical subjects including Database Management System, Data Structures, Data Algorithms, Object Oriented Programming, Operating Systems and many more.An all rounder website for placement preparation having company wise coding questions and MCQs.
InterviewBit - A great website to practice interview questions from top companies.
CareerCup - Good source for software engineering interview preparation.
CP-Algorithms - A good place to learn advanced data structures and algorithms for competitive programming.
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TopCoder Competitive Programming Tutorials - A list of best tutorials written by respected Topcoder members.
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A Way to Practice Competitive Programming - This tutorial will help you get from Rating 1000 to 2400+ on Codeforces. It is written by Codeforces Grandmaster Masataka Yoneda.
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Errichto's Youtube Channel - Good video tutorials about competitive programming.
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Striver's Youtube Channel - How to start Competitive Programming ? Guide for Beginners !
- Pramp - Here you can take free mock interviews based on data structures and algorithms, behavioural skills, product management and a lot more domains to explore.
- StopStalk - Here you can track your progress accross various websites and compare it with your friends and professional competitive coders.
- SDE Sheet Covers all the important topics for placements(with solutions).
- Cheat_Sheet Covers some important problems
- must_do Here you can find some of the most frequent problems asked in interviews
- DSA Cracker Sheet Covers all the important questions from all the topics for beginner.
- DSA Cheat Sheet Conatins 450 DSA Questions from all topics ranging from easy to hard level - made by Love Babbar
Crack_the_coding_interview An important book to up your interview skills
Narasimha Karumanchi - Data structures and algorithms made easy An important book to learn must needed algorithms for interviews
Competitive Programmer's Handbook An important book to improve competitive programming skills.