Which operating system is open source and created by Google?

• A. Windows
• B. iOS
• C. Android
• D. Linux

Answer: (C)

The operating system that is open source and created by Google is Android. Android is built on the Linux kernel and designed primarily for touchscreen devices such as smartphones and tablets. Being open source means that the source code is available for anyone to use, modify, and distribute, which has led to a vibrant ecosystem of developers and a wide variety of applications available on the platform.

In contrast, Windows and iOS are proprietary operating systems, meaning that their source code is not available to the public for modification or redistribution. Windows is developed by Microsoft, while iOS is developed by Apple. Linux, while open source, was not created by Google; it is the foundation on which Android operates, and it was developed by Linus Torvalds. Therefore, Android is the correct choice as it directly aligns with both the criteria of being open source and being developed by Google.