1. Different versions of Android OS: Android is a mobile operating system developed by Google. It has gone through several major updates since its first release in 2008. Some of the different versions include Android Cupcake (1.5), Donut (1.6), Eclair (2.0–2.1), Froyo (2.2–2.2.3), Gingerbread (2.3–2.3.7), Honeycomb (3.0–3.2.6), Ice Cream Sandwich (4.0–4.0.4), Jelly Bean (4.1–4.3.1), KitKat (4.4–4.4.4), Lollipop (5.0–5.1.1), Marshmallow (6.0–6.0.1), Nougat (7.0–7.1.2), Oreo (8.0–8.1), Pie (9.0), and the latest versions are Android 10 and Android 11.

2. Android Virtual Device (AVD): An Android Virtual Device (AVD) is a configuration that defines the characteristics of an Android phone, tablet, Wear OS, Android TV, or Automotive OS device that you want to simulate in the Android Emulator. It includes information about the system image, the device form factor, the Android version, and the set of hardware features that the simulated device supports.

3. Components of Android: Android has four main components: Activities, Services, Broadcast Receivers, and Content Providers. Activities are the UI components, Services are the background components, Broadcast Receivers are the components that respond to system-wide broadcast announcements, and Content Providers manage a shared set of application data.

4. Toast in Android: A toast provides simple feedback about an operation in a small popup. It only fills the amount of space required for the message and the current activity remains visible and interactive. Toasts automatically disappear after a timeout.

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1. Different versions of Android OS: Android is a mobile operating system developed by Google. It has gone through several major updates since its first release in 2008. Some of the different versions include Android Cupcake (1.5), Donut (1.6), Eclair (2.0–2.1), Froyo (2.2–2.2.3), Gingerbread (2.3–2.3.7), Honeycomb (3.0–3.2.6), Ice Cream Sandwich (4.0–4.0.4), Jelly Bean (4.1–4.3.1), KitKat (4.4–4.4.4), Lollipop (5.0–5.1.1), Marshmallow (6.0–6.0.1), Nougat (7.0–7.1.2), Oreo (8.0–8.1), Pie (9.0), and the latest versions are Android 10 and Android 11.

2. Android Virtual Device (AVD): An Android Virtual Device (AVD) is a configuration that defines the characteristics of an Android phone, tablet, Wear OS, Android TV, or Automotive OS device that you want to simulate in the Android Emulator. It includes information about the system image, the device form factor, the Android version, and the set of hardware features that the simulated device supports.

3. Components of Android: Android has four main components: Activities, Services, Broadcast Receivers, and Content Providers. Activities are the UI components, Services are the background components, Broadcast Receivers are the components that respond to system-wide broadcast announcements, and Content Providers manage a shared set of application data.

4. Toast in Android: A toast provides simple feedback about an operation in a small popup. It only fills the amount of space required for the message and the current activity remains visible and interactive. Toasts automatically disappear after a timeout.

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1. Different versions of Android OS: Android is a mobile operating system developed by Google. It has gone through several major updates since its first release in 2008. Some of the different versions include Android Cupcake (1.5), Donut (1.6), Eclair (2.0–2.1), Froyo (2.2–2.2.3), Gingerbread (2.3–2.3.7), Honeycomb (3.0–3.2.6), Ice Cream Sandwich (4.0–4.0.4), Jelly Bean (4.1–4.3.1), KitKat (4.4–4.4.4), Lollipop (5.0–5.1.1), Marshmallow (6.0–6.0.1), Nougat (7.0–7.1.2), Oreo (8.0–8.1), Pie (9.0), and the latest versions are Android 10 and Android 11.

2. Android Virtual Device (AVD): An Android Virtual Device (AVD) is a configuration that defines the characteristics of an Android phone, tablet, Wear OS, Android TV, or Automotive OS device that you want to simulate in the Android Emulator. It includes information about the system image, the device form factor, the Android version, and the set of hardware features that the simulated device supports.

3. Components of Android: Android has four main components: Activities, Services, Broadcast Receivers, and Content Providers. Activities are the UI components, Services are the background components, Broadcast Receivers are the components that respond to system-wide broadcast announcements, and Content Providers manage a shared set of application data.

4. Toast in Android: A toast provides simple feedback about an operation in a small popup. It only fills the amount of space required for the message and the current activity remains visible and interactive. Toasts automatically disappear after a timeout.

Q.5 Write a short note on following1. Different versions of Android OS.2. Android Virtual Device (AVD).3. Components of Android.4. Toast in Android.

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