5 Leetcode Alternatives for Data Scientists

In the competitive landscape of data science interviews, candidates often turn to platforms like LeetCode to hone their coding skills and prepare for technical assessments. However, while LeetCode is popular for software engineering interviews, its effectiveness for data science interviews may be limited.

Today we will explore the best alternative to Leetcode for Data Scientists, to help you ace your next Data Science Interview.

What is Leetcode?

LeetCode is a renowned online platform that offers a vast array of coding challenges and programming problems, primarily geared towards software engineers and developers. Founded in 2015, LeetCode has become a go-to resource for individuals seeking to enhance their coding skills, prepare for technical interviews, and advance their careers in the tech industry.

With its extensive library of problems spanning various difficulty levels and topics, LeetCode provides users with the opportunity to practice coding in multiple programming languages, including Python, Java, C++, and more. Additionally, LeetCode offers features such as discussion forums, where users can collaborate, share solutions, and seek assistance from a global community of developers, making it a comprehensive and interactive platform for honing coding proficiency.

Best Alternatives to Leetcode

1. Kaggle

Kaggle, acquired by Google in 2017, has evolved into the premier platform for data science enthusiasts and professionals alike. At its core, Kaggle hosts data science competitions where participants tackle real-world problems using machine learning and statistical modeling techniques. These competitions span diverse domains, providing participants with hands-on experience in solving complex data-driven challenges.

Apart from competitions, Kaggle offers an extensive collection of datasets covering various topics. These datasets serve as invaluable resources for data exploration, analysis, and model building, allowing users to gain insights and make meaningful contributions to the data science community.

In addition to competitions and datasets, Kaggle provides interactive code notebooks called Kernels, tutorials, courses, and discussions. These resources cater to learners of all levels, from beginners to experienced practitioners seeking to deepen their expertise in advanced topics.

2. Data Lemur

Data Lemur offers a curated selection of interactive exercises, tutorials, and projects covering a wide range of data science topics, including data cleaning, analysis, visualization, machine learning, and more. Many of their questions come directly from FAANG (Facebook, Amazon, Apple, Netflix, Google) interviews. Each exercise is designed to provide learners with practical experience in applying data science techniques to solve real-world problems, fostering a deeper understanding of concepts and methodologies.

One of Data Lemur's standout features is its interactive coding environment, which allows learners to write and execute code directly within the platform. This hands-on approach enables learners to experiment with different algorithms, visualize data, and analyze results in real time, enhancing their coding skills and analytical capabilities.

Data Lemur's comprehensive curriculum is tailored to prepare learners for data science roles in industry. By completing exercises and projects, learners gain proficiency in essential data science tools and techniques, build a portfolio of projects, and develop the skills sought after by employers in the field.

If you're not able to make a decision between Stratascratch and DataLemur check out this blog which breaks down the pricing and key features to help you decide which is best for your Data Science journey!

3. Data Camp

DataCamp provides a diverse range of interactive courses, projects, and assessments covering key topics in data science, including programming languages like Python and R, data manipulation, visualization, machine learning, and statistical analysis. Each course is carefully crafted to provide hands-on learning experiences, allowing learners to apply concepts in real-world scenarios and reinforce their understanding through interactive exercises and challenges.

One of DataCamp's standout features is its interactive coding interface, which allows learners to write and execute code directly within the platform. This immersive learning experience enables learners to practice coding skills in a supportive environment, receive instant feedback, and track their progress as they work through courses.

DataCamp's curriculum is specifically designed to prepare learners for data science interviews and real-world projects. By completing courses, learners gain proficiency in essential data science tools and techniques, build a portfolio of projects, and acquire the skills sought after by employers in the field.

4. Mode Analytics

Mode Analytics offers a range of resources, including SQL tutorials, data analysis challenges, and interview preparation materials, all designed specifically for data scientists. These resources provide learners with hands-on experience in querying databases, analyzing data, and solving real-world problems, enhancing their proficiency in key data science skills.

One of Mode Analytics' standout features is its SQL tutorials, which cover essential querying techniques and best practices. Learners can deepen their understanding of SQL through interactive tutorials, practical examples, and exercises, gaining the skills needed to manipulate and analyze data effectively.

Mode Analytics' interview preparation resources offer curated collections of data science interview questions, complete with detailed solutions and explanations. By practicing with these questions, learners can familiarize themselves with common interview scenarios, refine their problem-solving strategies, and boost their confidence for interviews and projects.

5. Exercism

Exercism offers a wide array of coding exercises and challenges in various programming languages, including Python, R, SQL, and more. These exercises cover fundamental data science concepts, algorithms, and techniques, allowing learners to practice their coding skills in a supportive environment.

One of Exercism's standout features is its mentorship program, where learners can receive feedback and guidance from experienced mentors. This collaborative approach fosters a supportive learning community, enabling learners to improve their problem-solving skills and gain valuable insights from peers and mentors.

Exercism's exercises are designed to prepare learners for data science roles by providing hands-on practice with coding challenges commonly encountered in real-world scenarios. By completing exercises and engaging with the community, learners can deepen their understanding of data science concepts and develop the skills needed to succeed in interviews, projects, and career advancement.

Honorable Mention: Ace the Data Science Interview

While it's not an online platform, it's another comprehensive resource for Data Interview Prep. While it has a chapter on Coding Interview Questions, which are similar to the ones found on LeetCode and DataLemur, you'll find many Data Science interview questions testing product-sense, case studies, and statistics that you won't find on any online platform

Which Platform Should I Use?

All these platforms are great for their reasons and are defined by their unique features. You may be asking yourself, well which one do I use?

Depending on what you are looking for different platforms may suit your needs best, here is what we think:

Kaggle: Best for Practical Application and Community Engagement

• Kaggle excels in providing hands-on experience through data science competitions, datasets, and kernels.
• Ideal for individuals seeking practical application and real-world problem-solving experience.
• Has a vibrant community where users can collaborate, share insights, and learn from peers and experts.

Data Lemur: Best for SQL questions and Data Science Interview Preparation

• Data Lemur offers a unique approach to data science learning, incorporating innovative methodologies, interactive features, and specialized resources not available on other platforms.
• Ideal for those looking for customized learning experiences where you can set goals and create personalized study plans
• Offers questions directly from competitive FAANG interviews, as well as guides on how to tackle interviews at specific companies

Data Camp: Best for structured Learning and Interactive Courses

• DataCamp specializes in interactive courses covering a wide range of data science topics.
• Ideal for learners who prefer structured learning paths and hands-on exercises.
• Offers a user-friendly interface and comprehensive curriculum designed to build proficiency in data science skills.

Mode Analytics: Best for SQL Skills and Data Analysis Challenges

• Mode Analytics offers SQL tutorials, data analysis challenges, and interview preparation resources.
• Ideal for individuals seeking to enhance their SQL skills and gain experience in data analysis.
• Provides curated challenges and resources tailored specifically for data scientists.

Exercism: Best for Coding Practice and Mentorship

• Exercism provides coding exercises and challenges in various programming languages.
• Ideal for individuals looking to improve their coding skills and problem-solving abilities.
• Mentorship program where learners can receive feedback and guidance from experienced mentors.

Looking to prepare specifically for the SQL Interview? Read about DataLemur vs. Leetcode for SQL Interviews, and what platform is best to equip you with the skills needed to ace the interview.

Conclusion

In conclusion, while established platforms like Kaggle, DataCamp, Exercism, and Mode Analytics offer robust resources and proven track records in data science education, the emergence of newer platforms like Data Lemur highlights the evolving landscape of learning options available to aspiring data scientists. Each platform brings its own strengths and unique features to the table, catering to diverse learning styles and preferences within the data science community. Ultimately, the choice of platform depends on individual needs, objectives, and the desire to explore novel approaches to data science education in an ever-changing field.

If you're looking for the best site to prepare for the Data Science Interview check out these 5 sites!