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Q: Which one of the following is open source operating system?
  • A. iOS
  • B. Android
  • C. Windows Vista
  • D. Windows -10
Correct Answer: Option B - Android is an open source operating system. Which is based on a modified version of the Linux Kernel and other open source software. Which is mainly designed for touchscreen mobile devices like smart phones and tablets. Android is developed by a Consortium of developers. It was unveiled in November 2007.
B. Android is an open source operating system. Which is based on a modified version of the Linux Kernel and other open source software. Which is mainly designed for touchscreen mobile devices like smart phones and tablets. Android is developed by a Consortium of developers. It was unveiled in November 2007.

Explanations:

Android is an open source operating system. Which is based on a modified version of the Linux Kernel and other open source software. Which is mainly designed for touchscreen mobile devices like smart phones and tablets. Android is developed by a Consortium of developers. It was unveiled in November 2007.