
HackerRank
CodeSignal
iMocha
TestGorilla
HackerEarth
mettl
HireVue
Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.

Atomic - Periodic Table
Periodica - Periodic Table
Periodic-table.io
Periodic Table
Kalzium
Periodic Table of Elements
Gnome Chemistry Utils
Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions from write-up sources.

Which is more popular?
Based on our record, Ptable seems to be a lot more popular than Codility. While we know about 29 links to Ptable, we've tracked only 2 mentions of Codility.
Website, pricing, platforms and company facts side by side.
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In their own words, as submitted to SaaSHub.


The Codility platform includes: CodeCheck - Design role-specific remote skills assessments to screen your technical candidates before moving them to the interview stage. CodeLive - Host technical remote or onsite interviews via our shared editor using a range of templates and whiteboards....
No description of Ptable yet.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
Walkthroughs and reviews on video.
An Introduction to Codility: The Tech Hiring Platform for Engineering Teams
PTable Review Final
How often each product is chosen within a category, 0–100% relative to the other.


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


Codility is a platform that helps companies assess the coding skills of developers. They offer a range of online coding tests and assessments that enable employers to evaluate candidates' technical abilities.
We have no reviews of Ptable yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


- Technical skills: have they got the walk to match the talk? Programming languages on a resume mean little if candidates are unable to demonstrate their hard coding skills. You can test these skills with technical skill tests, such as... - Source: dev.to / over 2 years ago
Codility : Verify and improve coding skills. - Source: dev.to / over 5 years ago
Https://ptable.com/#Electrons/HOAO Shows the highest occupied atomic orbital in full 3D you can rotate. Select any slot in the Hund diagram to see that orbital instead. - Source: Hacker News / over 2 years ago
Ptable renders them with WebGL from the quantum numbers using the Schrodinger equation, wrapping a threshold density of the generated point cloud with a surface. https://ptable.com/#Electrons/HOAO. - Source: Hacker News / almost 3 years ago
I was frustrated by the +4 oxidation state as well, but ptable.com says they exist based on the electrons tab. Probably only exists with fluorine, and maybe oxygen, at nonstandard temperature and pressures, but I honestly don't know. Source: almost 4 years ago
When comparing Codility and Ptable, you can also consider the following products.

HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
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Bring a Periodic Table with you anywhere you go
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CodeSignal is the leading assessment platform for technical hiring.
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Download this app from Microsoft Store for Windows 10. See screenshots, read the latest customer reviews, and compare ratings for Periodica - Periodic Table.
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Interactive periodic table of the chemical elements in 38 languages - Includes properties, history, name origin, facts, applications, hazards, isotopes and more
Compare Periodic-table.io to Codility or Ptable: