
LeetCode
Codility
CodeSignal
iMocha
HackerEarth
Codewars
TestGorilla
HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.

Springer Link
Emerald Insight
ProQuest
Sage Journals
Loc.gov
IntechOpen
Asce Library
ScienceDirect provides subscription-based access to a large database of scientific and medical...

Which is more popular?
Based on our record, HackerRank should be more popular than ScienceDirect. It has been mentioned 67 times since March 2021.
Website, pricing, platforms and company facts side by side.
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What each product offers, as listed by its team.


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Recommended for
HackerRank is recommended for students, individual learners, and job seekers looking to improve their coding skills, as well as for companies seeking an efficient way to evaluate candidates' technical abilities during the hiring process.
No analysis of ScienceDirect yet.
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using HackerRank and ScienceDirect. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


What are LeetCode and LeetCode alternatives good for?LeetCode💡Interested in leveling up your career? Apply to the Formation Fellowship...
HackerRank’s challenges cover a wide range of topics and difficulty levels, allowing developers to enhance their problem-solving skills and learn new algorithms and data structures. The competitive nature of...
HackerRank offers a wide array of challenges across various domains such as algorithms, mathematics, SQL, and functional programming. Its interface is user-friendly, and the platform provides detailed feedback on...
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Recommendations tracked on public social media and blogs since March 2021.


This way, you transfer what you already know (problem-solving) but only change the syntax. Platforms like Hackerrank are also great to solve the same problem in different languages and learn from other people’s solutions. - Source: dev.to / about 1 year ago
Firstly, solve some common data structure problems with it. Implement some data structures like arrays, linked lists, stacks, queues, etc. You can check common problems on LeetCode, Hackerank or some other resources. - Source: dev.to / over 2 years ago
I don't have a consecutive internet connection and I can't keep up learning process so I started practicing in hackerrank.com I have started some challenges in python and c++ there. Thus I have no internet connection so I cannot practice... Source: almost 3 years ago
You can research some more in those two sites (especially in sciencedirect.com, you can filter by open studies if you are broke like me). Source: about 3 years ago
That's incorrect. You also need to get some better sources. EPA.gov, the ICCT report, and sciencedirect.com are highly political institutions. Source: over 3 years ago
First of all, sciencedirect.com is not a peer reviewed science site. it gets a 2 out of 4 stars when rated by actual scientists. Source: almost 4 years ago
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Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
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Emerald Insight is a website that offers you thousands of books, articles, journals, and research papers on virtually all subjects from physical sciences such as physics and chemistry, to life sciences such as botany and zoology.
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CodeSignal is the leading assessment platform for technical hiring.
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ProQuest is a website that serves as an online educational hub where you can get eBooks, journals, research papers, articles, and even audios, videos, historical news, and magazines on any topic, subject, or fields such as physical sciences, health …
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