Online judges are systems designed for the reliable evaluation of algorithm source code submitted by users. In this article, we will take a look at the top 5 best competitive programming websites for interview preparation based on my opinion.
LeetCode is one of the best platforms to prepare for coding interviews in product based companies like Google, Facebook, Amazon, etc. In the past few years, leetcode has risen hugely in popularity and its community has grown immensely. It has a huge collection of question asked on various companies categorised into easy, medium and hard based on their difficulty. It supports 14 programming languages and has a very user friendly interface. It has a weekly challenge and daily programming question.
Best Suited for : beginners, intermediate and advanced
HackerRank is a place providing problems in a wide range of categories such as algorithms, machine learning, etc. HackerRank is a great resource if you’re seeking to polish your coding skills. It has a robust free version, verified solutions that you can check at any time. Several companies look for their HackerRank profile while hiring developers. HackerRank has around 5 levels of difficulty: Easy, Intermediate, Hard, Expert and Advanced. Several companies also hire through HackerRank.
Best Suited for : beginners, intermediate and advanced
Top Coder is one of the oldest comptetive programming websites. Top Coder has a huge community which is the main driving force behind the website. There are four primary segments of each Topcoder community, open to every member: Design, Development, Data Science, and Competitive Programming. It is one of the best coding practice sites for beginners that offer a lot of algorithmic challenges that you can complete on your own using their code editor tool.Topcoder Open (TCO) is an annual design, software development, data science and competitive programming championship, organized by Topcoder, and hosted in different venues around the US.
Best Suited for : beginners, intermediate and advanced
Code-Chef is one of the most popular coding platforms in India. I was started as an education initiative by Directi company and is currently owned by unacademy, It very often hosts hiring challenges for various companies. The coders are divided in to four divisions based on their rating. The only problem for me with code-chef is that sometimes the problem statements are too long and unnecessary.
Best Suited for : beginners, Intermediate
Code Studio is a new coding platform by Coding Ninjas. It has seen incredible growth in the past 2 years. It hosts hiring challenge for many product based companies and also have one of the best collection of interview experiences by students. Coding Ninjas itself offers many paid courses which are taught by industry experts. Overall, its a great new website to consider if you are starting out as a competitive programmer or a college student trying to crack coding interviews.
Best Suited for : beginners, intermediate
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