Question: Which of the following is the first completely open-source mobile operating system (OS)?
A Android
B iOS
C Windows Mobile
D Ubuntu Touch
Answer: Android
| Operating system | Description |
| Android | It is an open-source mobile operating system, based on the Linux kernel. |
| Year of First Release | 2008 |
| Developer | Originally developed by Android Inc. (acquired by Google in 2005) |
| Usage | · Used in smartphones · tablets · smart watches · TVs |
| App Store | Google Play Store is the official app store for Android applications. |
| Customization | Android allows users to personalize their devices |
| User Interface | Features a user-friendly interface with widgets, notifications, and navigation buttons. |
| Versions | · Jelly Bean · KitKat · Lollipop etc. |
| Security | Includes various security features and frequent updates to protect user data. |
| Market Share | Android had the largest market share among mobile operating systems. |