
HackerRank
7.4#1 in interview intelligence softwareFrom $165 a monthWebAPImacOSWindows
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| Fact | HackerRank | SQLZoo |
|---|---|---|
| Privacy | HackerRank states that it complies with ISO 27001 and the EU General Data Protection Regulation (GDPR). | The privacy policy says cookies and local storage record interactions and maintain user history, which is reviewed to improve content; anonymized usage patterns may be used for research. |
| Purpose | HackerRank helps companies attract, hire, and upskill developers while supporting a large developer community. | SQLZoo provides tutorials and reference to support people learning SQL. |
You want what its maker publishes above — check its page for the details.
SQLZoo suits people learning SQL through guided tutorials, practical exercises, and quizzes. Its maintainer also describes it as a fit for large classes with an instructor supporting learners face to face.