What are three features of the iOS mobile device operating system? (Choose three.)
- Linux based operating system
- closed source operating system
- developed by Open Handset Alliance
- source code not released to the public
- uses walled garden model for apps
- third-party apps are installed directly using an .apk file
Explanation: The iOS mobile device operating system is a closed source OS developed by Apple which uses a walled garden model for apps and its source code is not released to the public. Android is an open source operating system developed by the Open Handset Alliance.
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