Last updated: 2026-06-10
This site does not provide login features. Quiz history, missed questions, saved questions, and language settings are stored only in your browser using localStorage.
This learning data is not sent to or stored on the site operator's server.
This site uses Google Analytics 4 (GA4) to understand aggregated usage and improve the site. GA4 may send information such as viewed pages, referrers, browser and device information, click and quiz-completion events, and cookie-based identifiers to Google LLC.
GA4 is configured with IP anonymization, Google Signals disabled, and ad personalization signals disabled. This site does not include directly identifying information such as names, email addresses, or postal addresses in GA4 events.
Google Search Console is also used by the site operator to monitor search performance.
This site may include affiliate links to Amazon Associates and online learning services. When you click such links, click-related information may be sent to the linked service or affiliate provider. See the External Transmission Policy for details.
GA4 may use cookies or similar identifiers for analytics. You can disable or delete cookies in your browser settings. You may also use Google's Google Analytics Opt-out Browser Add-on where available.
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For questions or correction requests, please contact certyo.works+contact@gmail.com.