CyberCertPrepMobile Security FundamentalsApp ComponentsEASYFree question

Scenario

An iOS developer receives a crash report showing that their app crashed in the AppDelegate applicationDidEnterBackground: method while displaying a modal with sensitive account information. On the crash device, screenshots in the iOS app switcher show the account numbers.

What should the developer do in applicationDidEnterBackground: (or sceneDidEnterBackground:) to prevent sensitive information exposure in the app switcher?

A.Call UIApplication.shared.ignoreSnapshotOnNextApplicationLaunch() which instructs iOS to skip the snapshot for the current session
B.Set UIApplication.shared.isIdleTimerDisabled = true in applicationDidEnterBackground: to prevent the device from locking and taking the screenshot
C.Place an opaque overlay view or blur the window in sceneDidEnterBackground:, and remove it in sceneWillEnterForeground: - or use UIImageView with a placeholder image over the window; this prevents the OS snapshot (used for the app switcher thumbnail) from capturing sensitive content
D.Implement applicationWillResignActive: and call becomeFirstResponder() to prevent the app from entering background state when sensitive dialogs are open

Where this fits in the Mobile Security Fundamentals exam

App Components

Android components (Activities, Services, BroadcastReceivers, ContentProviders) and iOS scenes/view controllers; exported components and attack surface.

This question belongs to the "App Components" domain, which makes up about 12% of the Mobile Security Fundamentals exam.

Practice this topic Mobile Security Fundamentals exam guide

What should the developer do in applicationDidEnterBackground: (or sceneDidEnterBackground:) to prevent sensitive information exposure in the app switcher?

Where this fits in the Mobile Security Fundamentals exam

More free App Components questions

One question down. Thousands to go.