CyberCertPrepMobile Security FundamentalsMobile Security BasicsEASYFree question
A user reports being billed for in-app purchases they did not make on their Android device. Which combination of controls BEST prevents unauthorized in-app purchase fraud on a shared device?
- A.Require purchase authentication for every transaction via Google Play settings and enable Family Library restrictions
- B.Enable the platform scanner and block installation from every source outside the official store on the shared handset the family uses
- C.Uninstall the affected application and reinstall it from a backup taken before all the charges appeared on the account statement
- D.Enable the screen lock and always switch off the contactless radio
Why A is correct
Google Play's 'Require authentication for purchases' setting (Settings > Require authentication > For all purchases) enforces biometric or PIN confirmation for every in-app purchase, preventing unauthorized charges on a shared device. Family Library restrictions further limit which accounts can authorize spending. Google Play Protect scans for malware but does not prevent authorized-session purchase abuse. Screen lock and NFC state do not affect in-app billing authentication. Reinstalling the app does not change the underlying billing authentication policy.
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